[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // ------------------------------------------------------------- |
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| 28 | // GEANT 4 class implementation file |
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| 29 | // |
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| 30 | // History: based on object model of |
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| 31 | // 2nd December 1995, G.Cosmo |
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| 32 | // ---------- G4hLowEnergyIonisation physics process ------- |
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| 33 | // by Vladimir Ivanchenko, 14 July 1999 |
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| 34 | // was made on the base of G4hIonisation class |
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| 35 | // developed by Laszlo Urban |
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| 36 | // ************************************************************ |
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| 37 | // It is the extention of the ionisation process for the slow |
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| 38 | // charged hadrons. |
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| 39 | // ************************************************************ |
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| 40 | // 28 July 1999 V.Ivanchenko cleen up |
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| 41 | // 17 August 1999 G.Mancinelli added ICRU parametrisations for protons |
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| 42 | // 20 August 1999 G.Mancinelli added ICRU tables for alpha |
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| 43 | // 31 August 1999 V.Ivanchenko update and cleen up |
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| 44 | // 30 Sept. 1999 V.Ivanchenko minor upgrade |
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| 45 | // 12 Dec. 1999 S. Chauvie added Barkas correction |
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| 46 | // 19 Jan. 2000 V.Ivanchenko minor changing in Barkas corrections |
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| 47 | // 02 April 2000 S. Chauvie linearization of Barkas effect |
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| 48 | // 03 April 2000 V.Ivanchenko Nuclear Stopping power for antiprotons |
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| 49 | // 23 May 2000 MG Pia Clean up for QAO model |
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| 50 | // 24 May 2000 MG Pia Code properly indented to improve legibility |
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| 51 | // 17 July 2000 V.Ivanchenko Bug in scaling AlongStepDoIt method |
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| 52 | // 25 July 2000 V.Ivanchenko New design iteration |
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| 53 | // 17 August 2000 V.Ivanchenko Add ion fluctuation models |
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| 54 | // 18 August 2000 V.Ivanchenko Bug fixed in GetConstrain |
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| 55 | // 22 August 2000 V.Ivanchenko Insert paramStepLimit and |
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| 56 | // reorganise access to Barkas and Bloch terms |
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| 57 | // 04 Sept. 2000 V.Ivanchenko rename fluctuations |
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| 58 | // 05 Sept. 2000 V.Ivanchenko clean up |
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| 59 | // 03 Oct. 2000 V.Ivanchenko CodeWizard clean up |
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| 60 | // 03 Nov. 2000 V.Ivanchenko MinKineticEnergy=LowestKineticEnergy=10eV |
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| 61 | // 05 Nov. 2000 MG Pia - Removed const cast previously introduced to get |
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| 62 | // the code compiled (const G4Material* now introduced in |
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| 63 | // electromagnetic/utils utils-V02-00-03 tag) |
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| 64 | // (this is going back and forth, to cope with Michel's |
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| 65 | // utils tag not being accepted yet by system testing) |
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| 66 | // 21 Nov. 2000 V.Ivanchenko Fix a problem in fluctuations |
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| 67 | // 23 Nov. 2000 V.Ivanchenko Ion type fluctuations only for charge>0 |
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| 68 | // 10 May 2001 V.Ivanchenko Clean up againist Linux compilation with -Wall |
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| 69 | // 23 May 2001 V.Ivanchenko Minor fix in PostStepDoIt |
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| 70 | // 07 June 2001 V.Ivanchenko Clean up AntiProtonDEDX + add print out |
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| 71 | // 18 June 2001 V.Ivanchenko Cleanup print out |
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| 72 | // 18 Oct. 2001 V.Ivanchenko Add fluorescence |
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| 73 | // 30 Oct. 2001 V.Ivanchenko Add minGammaEnergy and minElectronEnergy |
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| 74 | // 07 Dec 2001 V.Ivanchenko Add SetFluorescence method |
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| 75 | // 15 Feb 2002 V.Ivanchenko Fix problem of Generic Ions |
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| 76 | // 25 Mar 2002 V.Ivanchenko Fix problem of fluorescence below threshold |
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| 77 | // 28 Mar 2002 V.Ivanchenko Set fluorescence off by default |
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| 78 | // 09 Apr 2002 V.Ivanchenko Fix table problem of GenericIons |
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| 79 | // 28 May 2002 V.Ivanchenko Remove flag fStopAndKill |
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| 80 | // 31 May 2002 V.Ivanchenko Add path of Fluo + Auger cuts to |
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| 81 | // AtomicDeexcitation |
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| 82 | // 03 Jun 2002 MGP Restore fStopAndKill |
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| 83 | // 10 Jun 2002 V.Ivanchenko Restore fStopButAlive |
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| 84 | // 12 Jun 2002 V.Ivanchenko Fix in fluctuations - if tmax<2*Ipot Gaussian |
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| 85 | // fluctuations enables |
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| 86 | // 20 Sept 2002 V.Ivanchenko Clean up energy ranges for models |
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| 87 | // 07 Oct 2002 V.Ivanchenko Clean up initialisation of fluorescence |
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| 88 | // 28 Oct 2002 V.Ivanchenko Optimal binning for dE/dx |
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| 89 | // 10 Dec 2002 V.Ivanchenko antiProtonLowEnergy -> 25 keV, QEG model below |
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| 90 | // 21 Jan 2003 V.Ivanchenko Cut per region |
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| 91 | // 10 Mar 2003 V.Ivanchenko Use SubTypes for ions |
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| 92 | // 12 Apr 2003 V.Ivanchenko Cut per region for fluo AlongStep |
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| 93 | // 18 Apr 2003 V.Ivanchenko finalRange redefinition |
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| 94 | // 26 Apr 2003 V.Ivanchenko fix for stepLimit |
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| 95 | // 30 Mar 2004 S.Saliceti add shellCS data member and expFlag variable, |
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| 96 | // atom total cross section for the Empiric Model |
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| 97 | // 28 May 2004 V.Ivanchenko fix for ionisation of antiprotons in complex materials |
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| 98 | // 30 Aug 2004 V.Ivanchenko use energy limit for parameterisation from model |
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| 99 | // 03 Oct 2005 V.Ivanchenko change logic of definition of high energy limit for |
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| 100 | // parametrised proton model: min(user value, model limit) |
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| 101 | // 26 Jan 2005 S. Chauvie added PrintInfoDefinition() for antiproton |
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[1315] | 102 | // 30 Sep 2009 A.Mantero Removed dependencies to old shell Ionisation XS models |
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| 103 | // 07 Jun 2010 Code Celaning for June beta Release |
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[819] | 104 | // ----------------------------------------------------------------------- |
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| 105 | |
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| 106 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 107 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 108 | |
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| 109 | #include "G4hLowEnergyIonisation.hh" |
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| 110 | #include "globals.hh" |
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| 111 | #include "G4ios.hh" |
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| 112 | #include "Randomize.hh" |
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| 113 | #include "G4Poisson.hh" |
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| 114 | #include "G4UnitsTable.hh" |
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| 115 | #include "G4EnergyLossTables.hh" |
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| 116 | #include "G4Material.hh" |
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| 117 | #include "G4DynamicParticle.hh" |
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| 118 | #include "G4ParticleDefinition.hh" |
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| 119 | #include "G4AtomicDeexcitation.hh" |
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| 120 | #include "G4AtomicTransitionManager.hh" |
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| 121 | #include "G4ShellVacancy.hh" |
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| 122 | #include "G4VhShellCrossSection.hh" |
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| 123 | #include "G4VEMDataSet.hh" |
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| 124 | #include "G4EMDataSet.hh" |
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| 125 | #include "G4CompositeEMDataSet.hh" |
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| 126 | #include "G4Gamma.hh" |
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| 127 | #include "G4LogLogInterpolation.hh" |
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| 128 | #include "G4SemiLogInterpolation.hh" |
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| 129 | #include "G4ProcessManager.hh" |
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| 130 | #include "G4ProductionCutsTable.hh" |
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[1315] | 131 | #include "G4teoCrossSection.hh" |
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| 132 | #include "G4empCrossSection.hh" |
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[819] | 133 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 134 | |
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| 135 | G4hLowEnergyIonisation::G4hLowEnergyIonisation(const G4String& processName) |
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| 136 | : G4hLowEnergyLoss(processName), |
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| 137 | theBetheBlochModel(0), |
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| 138 | theProtonModel(0), |
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| 139 | theAntiProtonModel(0), |
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| 140 | theIonEffChargeModel(0), |
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| 141 | theNuclearStoppingModel(0), |
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| 142 | theIonChuFluctuationModel(0), |
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| 143 | theIonYangFluctuationModel(0), |
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| 144 | theProtonTable("ICRU_R49p"), |
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| 145 | theAntiProtonTable("ICRU_R49p"), |
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| 146 | theNuclearTable("ICRU_R49"), |
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| 147 | nStopping(true), |
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| 148 | theBarkas(true), |
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| 149 | theMeanFreePathTable(0), |
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| 150 | paramStepLimit (0.005), |
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| 151 | shellVacancy(0), |
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| 152 | shellCS(0), |
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[1315] | 153 | theFluo(false) |
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[819] | 154 | { |
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| 155 | InitializeMe(); |
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| 156 | } |
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| 157 | |
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| 158 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 159 | |
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| 160 | void G4hLowEnergyIonisation::InitializeMe() |
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| 161 | { |
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| 162 | LowestKineticEnergy = 10.0*eV ; |
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| 163 | HighestKineticEnergy = 100.0*GeV ; |
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| 164 | MinKineticEnergy = 10.0*eV ; |
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| 165 | TotBin = 360 ; |
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| 166 | protonLowEnergy = 1.*keV ; |
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| 167 | protonHighEnergy = 100.*MeV ; |
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| 168 | antiProtonLowEnergy = 25.*keV ; |
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| 169 | antiProtonHighEnergy = 2.*MeV ; |
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| 170 | minGammaEnergy = 25.*keV; |
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| 171 | minElectronEnergy = 25.*keV; |
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| 172 | verboseLevel = 0; |
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| 173 | |
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[1315] | 174 | shellCS = new G4teoCrossSection("analytical"); |
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[819] | 175 | |
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| 176 | } |
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| 177 | |
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| 178 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 179 | |
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| 180 | G4hLowEnergyIonisation::~G4hLowEnergyIonisation() |
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| 181 | { |
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| 182 | if (theMeanFreePathTable) { |
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| 183 | theMeanFreePathTable->clearAndDestroy(); |
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| 184 | delete theMeanFreePathTable; |
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| 185 | } |
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| 186 | if(theBetheBlochModel)delete theBetheBlochModel; |
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| 187 | if(theProtonModel)delete theProtonModel; |
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| 188 | if(theAntiProtonModel)delete theAntiProtonModel; |
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| 189 | if(theNuclearStoppingModel)delete theNuclearStoppingModel; |
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| 190 | if(theIonEffChargeModel)delete theIonEffChargeModel; |
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| 191 | if(theIonChuFluctuationModel)delete theIonChuFluctuationModel; |
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| 192 | if(theIonYangFluctuationModel)delete theIonYangFluctuationModel; |
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| 193 | if(shellVacancy) delete shellVacancy; |
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| 194 | if(shellCS) delete shellCS; |
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| 195 | cutForDelta.clear(); |
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| 196 | G4int length = zFluoDataVector.size(); |
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| 197 | if(length) { |
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| 198 | for(G4int i=0; i<length; i++) { |
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| 199 | delete zFluoDataVector[i]; |
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| 200 | } |
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| 201 | zFluoDataVector.clear(); |
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| 202 | } |
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| 203 | } |
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| 204 | |
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| 205 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 206 | |
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| 207 | void G4hLowEnergyIonisation::SetElectronicStoppingPowerModel( |
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| 208 | const G4ParticleDefinition* aParticle, |
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| 209 | const G4String& dedxTable) |
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| 210 | // This method defines the ionisation parametrisation method via its name |
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| 211 | { |
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| 212 | if(0 < aParticle->GetPDGCharge()) { |
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| 213 | SetProtonElectronicStoppingPowerModel(dedxTable) ; |
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| 214 | } else { |
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| 215 | SetAntiProtonElectronicStoppingPowerModel(dedxTable) ; |
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| 216 | } |
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| 217 | } |
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| 218 | |
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| 219 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 220 | |
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| 221 | void G4hLowEnergyIonisation::InitializeParametrisation() |
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| 222 | |
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| 223 | { |
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| 224 | // Define models for parametrisation of electronic energy losses |
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| 225 | theBetheBlochModel = new G4hBetheBlochModel("Bethe-Bloch") ; |
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| 226 | theProtonModel = new G4hParametrisedLossModel(theProtonTable) ; |
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| 227 | protonHighEnergy = std::min(protonHighEnergy,theProtonModel->HighEnergyLimit(0, 0)); |
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| 228 | theAntiProtonModel = new G4QAOLowEnergyLoss(theAntiProtonTable) ; |
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| 229 | theNuclearStoppingModel = new G4hNuclearStoppingModel(theNuclearTable) ; |
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| 230 | theIonEffChargeModel = new G4hIonEffChargeSquare("Ziegler1988") ; |
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| 231 | theIonChuFluctuationModel = new G4IonChuFluctuationModel("Chu") ; |
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| 232 | theIonYangFluctuationModel = new G4IonYangFluctuationModel("Yang") ; |
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| 233 | } |
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| 234 | |
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| 235 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 236 | |
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| 237 | void G4hLowEnergyIonisation::BuildPhysicsTable( |
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| 238 | const G4ParticleDefinition& aParticleType) |
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| 239 | |
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| 240 | // just call BuildLossTable+BuildLambdaTable |
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| 241 | { |
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| 242 | if(verboseLevel > 0) { |
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| 243 | G4cout << "G4hLowEnergyIonisation::BuildPhysicsTable for " |
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| 244 | << aParticleType.GetParticleName() |
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| 245 | << " mass(MeV)= " << aParticleType.GetPDGMass()/MeV |
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| 246 | << " charge= " << aParticleType.GetPDGCharge()/eplus |
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| 247 | << " type= " << aParticleType.GetParticleType() |
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| 248 | << G4endl; |
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| 249 | |
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| 250 | if(verboseLevel > 1) { |
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| 251 | G4ProcessVector* pv = aParticleType.GetProcessManager()->GetProcessList(); |
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| 252 | |
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| 253 | G4cout << " 0: " << (*pv)[0]->GetProcessName() << " " << (*pv)[0] |
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| 254 | << " 1: " << (*pv)[1]->GetProcessName() << " " << (*pv)[1] |
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| 255 | // << " 2: " << (*pv)[2]->GetProcessName() << " " << (*pv)[2] |
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| 256 | << G4endl; |
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| 257 | G4cout << "ionModel= " << theIonEffChargeModel |
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| 258 | << " MFPtable= " << theMeanFreePathTable |
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| 259 | << " iniMass= " << initialMass |
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| 260 | << G4endl; |
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| 261 | } |
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| 262 | } |
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| 263 | |
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| 264 | if(aParticleType.GetParticleType() == "nucleus" && |
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| 265 | aParticleType.GetParticleName() != "GenericIon" && |
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| 266 | aParticleType.GetParticleSubType() == "generic") |
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| 267 | { |
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| 268 | |
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| 269 | G4EnergyLossTables::Register(&aParticleType, |
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| 270 | theDEDXpTable, |
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| 271 | theRangepTable, |
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| 272 | theInverseRangepTable, |
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| 273 | theLabTimepTable, |
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| 274 | theProperTimepTable, |
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| 275 | LowestKineticEnergy, HighestKineticEnergy, |
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| 276 | proton_mass_c2/aParticleType.GetPDGMass(), |
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| 277 | TotBin); |
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| 278 | |
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| 279 | return; |
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| 280 | } |
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| 281 | |
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| 282 | if( !CutsWhereModified() && theLossTable) return; |
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| 283 | |
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| 284 | InitializeParametrisation() ; |
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| 285 | G4Proton* theProton = G4Proton::Proton(); |
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| 286 | G4AntiProton* theAntiProton = G4AntiProton::AntiProton(); |
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| 287 | |
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| 288 | charge = aParticleType.GetPDGCharge()/eplus; |
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| 289 | chargeSquare = charge*charge ; |
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| 290 | |
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| 291 | const G4ProductionCutsTable* theCoupleTable= |
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| 292 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 293 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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| 294 | |
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| 295 | cutForDelta.clear(); |
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| 296 | cutForGamma.clear(); |
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| 297 | |
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| 298 | for (size_t j=0; j<numOfCouples; j++) { |
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| 299 | |
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| 300 | // get material parameters needed for the energy loss calculation |
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| 301 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
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| 302 | const G4Material* material= couple->GetMaterial(); |
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| 303 | |
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| 304 | // the cut cannot be below lowest limit |
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| 305 | G4double tCut = (*(theCoupleTable->GetEnergyCutsVector(1)))[j]; |
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| 306 | if(tCut > HighestKineticEnergy) tCut = HighestKineticEnergy; |
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| 307 | |
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| 308 | G4double excEnergy = material->GetIonisation()->GetMeanExcitationEnergy(); |
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| 309 | |
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| 310 | tCut = std::max(tCut,excEnergy); |
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| 311 | cutForDelta.push_back(tCut); |
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| 312 | |
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| 313 | // the cut cannot be below lowest limit |
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| 314 | tCut = (*(theCoupleTable->GetEnergyCutsVector(0)))[j]; |
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| 315 | if(tCut > HighestKineticEnergy) tCut = HighestKineticEnergy; |
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| 316 | tCut = std::max(tCut,minGammaEnergy); |
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| 317 | cutForGamma.push_back(tCut); |
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| 318 | } |
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| 319 | |
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| 320 | if(verboseLevel > 0) { |
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| 321 | G4cout << "Cuts are defined " << G4endl; |
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| 322 | } |
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| 323 | |
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| 324 | if(0.0 < charge) |
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| 325 | { |
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| 326 | { |
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| 327 | BuildLossTable(*theProton) ; |
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| 328 | |
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| 329 | // The following vector has a fixed dimension (see src/G4hLowEnergyLoss.cc for more details) |
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| 330 | // It happended in the past that caused memory corruption errors. The problem is still pending, even if temporary solved |
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| 331 | // G4cout << "[NOTE]: __LINE__=" << __LINE__ << ", aParticleType=" << aParticleType.GetParticleName() << ", theProton=" << theProton << ", theLossTable=" << theLossTable << ", CounterOfpProcess=" << CounterOfpProcess << G4endl; |
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| 332 | |
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| 333 | RecorderOfpProcess[CounterOfpProcess] = theLossTable ; |
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| 334 | CounterOfpProcess++; |
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| 335 | } |
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| 336 | } else { |
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| 337 | { |
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| 338 | BuildLossTable(*theAntiProton) ; |
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| 339 | |
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| 340 | // The following vector has a fixed dimension (see src/G4hLowEnergyLoss.cc for more details) |
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| 341 | // It happended in the past that caused memory corruption errors. The problem is still pending, even if temporary solved |
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| 342 | // G4cout << "[NOTE]: __LINE__=" << __LINE__ << ", aParticleType=" << aParticleType.GetParticleName() << ", theAntiProton=" << theAntiProton << ", theLossTable=" << theLossTable << ", CounterOfpbarProcess=" << CounterOfpbarProcess << G4endl; |
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| 343 | |
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| 344 | RecorderOfpbarProcess[CounterOfpbarProcess] = theLossTable ; |
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| 345 | CounterOfpbarProcess++; |
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| 346 | } |
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| 347 | } |
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| 348 | |
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| 349 | if(verboseLevel > 0) { |
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| 350 | G4cout << "G4hLowEnergyIonisation::BuildPhysicsTable: " |
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| 351 | << "Loss table is built " |
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| 352 | // << theLossTable |
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| 353 | << G4endl; |
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| 354 | } |
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| 355 | |
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| 356 | BuildLambdaTable(aParticleType) ; |
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| 357 | BuildDataForFluorescence(aParticleType); |
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| 358 | |
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| 359 | if(verboseLevel > 1) { |
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| 360 | G4cout << (*theMeanFreePathTable) << G4endl; |
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| 361 | } |
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| 362 | |
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| 363 | if(verboseLevel > 0) { |
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| 364 | G4cout << "G4hLowEnergyIonisation::BuildPhysicsTable: " |
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| 365 | << "DEDX table will be built " |
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| 366 | // << theDEDXpTable << " " << theDEDXpbarTable |
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| 367 | // << " " << theRangepTable << " " << theRangepbarTable |
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| 368 | << G4endl; |
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| 369 | } |
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| 370 | |
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| 371 | BuildDEDXTable(aParticleType) ; |
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| 372 | |
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| 373 | if(verboseLevel > 1) { |
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| 374 | G4cout << (*theDEDXpTable) << G4endl; |
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| 375 | } |
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| 376 | |
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| 377 | if((&aParticleType == theProton) || (&aParticleType == theAntiProton)) PrintInfoDefinition() ; |
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| 378 | |
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| 379 | if(verboseLevel > 0) { |
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| 380 | G4cout << "G4hLowEnergyIonisation::BuildPhysicsTable: end for " |
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| 381 | << aParticleType.GetParticleName() << G4endl; |
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| 382 | } |
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| 383 | } |
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| 384 | |
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| 385 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 386 | |
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| 387 | void G4hLowEnergyIonisation::BuildLossTable( |
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| 388 | const G4ParticleDefinition& aParticleType) |
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| 389 | { |
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| 390 | |
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| 391 | // Initialisation |
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| 392 | G4double lowEdgeEnergy , ionloss, ionlossBB, paramB ; |
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| 393 | G4double lowEnergy, highEnergy; |
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| 394 | G4Proton* theProton = G4Proton::Proton(); |
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| 395 | |
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| 396 | if(aParticleType == *theProton) { |
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| 397 | lowEnergy = protonLowEnergy ; |
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| 398 | highEnergy = protonHighEnergy ; |
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| 399 | charge = 1.0 ; |
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| 400 | } else { |
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| 401 | lowEnergy = antiProtonLowEnergy ; |
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| 402 | highEnergy = antiProtonHighEnergy ; |
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| 403 | charge = -1.0 ; |
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| 404 | } |
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| 405 | chargeSquare = 1.0 ; |
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| 406 | |
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| 407 | const G4ProductionCutsTable* theCoupleTable= |
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| 408 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 409 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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| 410 | |
---|
| 411 | if ( theLossTable) { |
---|
| 412 | theLossTable->clearAndDestroy(); |
---|
| 413 | delete theLossTable; |
---|
| 414 | } |
---|
| 415 | |
---|
| 416 | theLossTable = new G4PhysicsTable(numOfCouples); |
---|
| 417 | |
---|
| 418 | // loop for materials |
---|
| 419 | for (size_t j=0; j<numOfCouples; j++) { |
---|
| 420 | |
---|
| 421 | // create physics vector and fill it |
---|
| 422 | G4PhysicsLogVector* aVector = new G4PhysicsLogVector(LowestKineticEnergy, |
---|
| 423 | HighestKineticEnergy, |
---|
| 424 | TotBin); |
---|
| 425 | |
---|
| 426 | // get material parameters needed for the energy loss calculation |
---|
| 427 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
---|
| 428 | const G4Material* material= couple->GetMaterial(); |
---|
| 429 | |
---|
| 430 | if ( charge > 0.0 ) { |
---|
| 431 | ionloss = ProtonParametrisedDEDX(couple,highEnergy) ; |
---|
| 432 | } else { |
---|
| 433 | ionloss = AntiProtonParametrisedDEDX(couple,highEnergy) ; |
---|
| 434 | } |
---|
| 435 | |
---|
| 436 | ionlossBB = theBetheBlochModel->TheValue(&aParticleType,material,highEnergy) ; |
---|
| 437 | ionlossBB -= DeltaRaysEnergy(couple,highEnergy,proton_mass_c2) ; |
---|
| 438 | |
---|
| 439 | |
---|
| 440 | paramB = ionloss/ionlossBB - 1.0 ; |
---|
| 441 | |
---|
| 442 | // now comes the loop for the kinetic energy values |
---|
| 443 | for (G4int i = 0 ; i < TotBin ; i++) { |
---|
| 444 | lowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ; |
---|
| 445 | |
---|
| 446 | // low energy part for this material, parametrised energy loss formulae |
---|
| 447 | if ( lowEdgeEnergy < highEnergy ) { |
---|
| 448 | |
---|
| 449 | if ( charge > 0.0 ) { |
---|
| 450 | ionloss = ProtonParametrisedDEDX(couple,lowEdgeEnergy) ; |
---|
| 451 | } else { |
---|
| 452 | ionloss = AntiProtonParametrisedDEDX(couple,lowEdgeEnergy) ; |
---|
| 453 | } |
---|
| 454 | |
---|
| 455 | } else { |
---|
| 456 | |
---|
| 457 | // high energy part for this material, Bethe-Bloch formula |
---|
| 458 | ionloss = theBetheBlochModel->TheValue(theProton,material, |
---|
| 459 | lowEdgeEnergy) ; |
---|
| 460 | |
---|
| 461 | ionloss -= DeltaRaysEnergy(couple,lowEdgeEnergy,proton_mass_c2) ; |
---|
| 462 | |
---|
| 463 | ionloss *= (1.0 + paramB*highEnergy/lowEdgeEnergy) ; |
---|
| 464 | } |
---|
| 465 | |
---|
| 466 | // now put the loss into the vector |
---|
| 467 | if(verboseLevel > 1) { |
---|
| 468 | G4cout << "E(MeV)= " << lowEdgeEnergy/MeV |
---|
| 469 | << " dE/dx(MeV/mm)= " << ionloss*mm/MeV |
---|
| 470 | << " in " << material->GetName() << G4endl; |
---|
| 471 | } |
---|
| 472 | aVector->PutValue(i,ionloss) ; |
---|
| 473 | } |
---|
| 474 | // Insert vector for this material into the table |
---|
| 475 | theLossTable->insert(aVector) ; |
---|
| 476 | } |
---|
| 477 | } |
---|
| 478 | |
---|
| 479 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 480 | |
---|
| 481 | void G4hLowEnergyIonisation::BuildDataForFluorescence( |
---|
| 482 | const G4ParticleDefinition& aParticleType) |
---|
| 483 | { |
---|
| 484 | |
---|
| 485 | if(verboseLevel > 1) { |
---|
| 486 | G4cout << "G4hLowEnergyIonisation::BuildDataForFluorescence for " |
---|
| 487 | << aParticleType.GetParticleName() << " is started" << G4endl; |
---|
| 488 | } |
---|
| 489 | |
---|
| 490 | // fill data for fluorescence |
---|
| 491 | |
---|
| 492 | deexcitationManager.SetCutForSecondaryPhotons(minGammaEnergy); |
---|
| 493 | deexcitationManager.SetCutForAugerElectrons(minElectronEnergy); |
---|
| 494 | |
---|
| 495 | G4double mass = aParticleType.GetPDGMass(); |
---|
| 496 | const G4ProductionCutsTable* theCoupleTable= |
---|
| 497 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
| 498 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
| 499 | |
---|
| 500 | if (shellVacancy != 0) delete shellVacancy; |
---|
| 501 | shellVacancy = new G4ShellVacancy(); |
---|
| 502 | G4DataVector* ksi = 0; |
---|
| 503 | G4DataVector* ksi1 = 0; |
---|
| 504 | G4DataVector* energy = 0; |
---|
| 505 | G4DataVector* energy1 = 0; |
---|
| 506 | size_t binForFluo = TotBin/10; |
---|
| 507 | G4int length = zFluoDataVector.size(); |
---|
| 508 | if(length > 0) { |
---|
| 509 | for(G4int i=0; i<length; i++) { |
---|
| 510 | G4VEMDataSet* x = zFluoDataVector[i]; |
---|
| 511 | delete x; |
---|
| 512 | } |
---|
| 513 | zFluoDataVector.clear(); |
---|
| 514 | } |
---|
| 515 | |
---|
| 516 | G4PhysicsLogVector* bVector = new G4PhysicsLogVector(LowestKineticEnergy, |
---|
| 517 | HighestKineticEnergy, |
---|
| 518 | binForFluo); |
---|
| 519 | const G4AtomicTransitionManager* transitionManager = |
---|
| 520 | G4AtomicTransitionManager::Instance(); |
---|
| 521 | |
---|
| 522 | G4double bindingEnergy; |
---|
| 523 | // G4double x; |
---|
| 524 | // G4double y; |
---|
| 525 | |
---|
| 526 | // loop for materials |
---|
| 527 | for (size_t j=0; j<numOfCouples; j++) { |
---|
| 528 | |
---|
| 529 | // get material parameters needed for the energy loss calculation |
---|
| 530 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
---|
| 531 | const G4Material* material= couple->GetMaterial(); |
---|
| 532 | |
---|
| 533 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
| 534 | size_t NumberOfElements = material->GetNumberOfElements() ; |
---|
| 535 | const G4double* theAtomicNumDensityVector = |
---|
| 536 | material->GetAtomicNumDensityVector(); |
---|
| 537 | G4VDataSetAlgorithm* interp = new G4SemiLogInterpolation(); |
---|
| 538 | G4VEMDataSet* xsis = new G4CompositeEMDataSet(interp, 1., 1.); |
---|
| 539 | G4VDataSetAlgorithm* interp1 = new G4SemiLogInterpolation(); |
---|
| 540 | G4VEMDataSet* xsis1 = new G4CompositeEMDataSet(interp1, 1., 1.); |
---|
| 541 | |
---|
| 542 | G4double tCut = cutForDelta[j]; |
---|
| 543 | G4double elDensity = 1.; |
---|
| 544 | |
---|
| 545 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
---|
| 546 | |
---|
| 547 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
---|
| 548 | G4int nShells = transitionManager->NumberOfShells(Z); |
---|
| 549 | energy = new G4DataVector(); |
---|
| 550 | ksi = new G4DataVector(); |
---|
| 551 | energy1= new G4DataVector(); |
---|
| 552 | ksi1 = new G4DataVector(); |
---|
| 553 | //if(NumberOfElements > 1) |
---|
| 554 | elDensity = theAtomicNumDensityVector[iel]/((G4double)nShells); |
---|
| 555 | |
---|
| 556 | for (size_t j = 0; j<binForFluo; j++) { |
---|
| 557 | |
---|
| 558 | G4double tkin = bVector->GetLowEdgeEnergy(j); |
---|
| 559 | G4double gamma = tkin/mass + 1.; |
---|
| 560 | G4double beta2 = 1.0 - 1.0/(gamma*gamma); |
---|
| 561 | G4double r = electron_mass_c2/mass; |
---|
| 562 | G4double tmax = 2.*electron_mass_c2*(gamma*gamma - 1.)/(1. + 2.*gamma*r + r*r); |
---|
| 563 | G4double cross = 0.; |
---|
| 564 | G4double cross1 = 0.; |
---|
| 565 | G4double eAverage= 0.; |
---|
| 566 | G4double tmin = std::min(tCut,tmax); |
---|
| 567 | G4double rel; |
---|
| 568 | |
---|
| 569 | for (G4int n=0; n<nShells; n++) { |
---|
| 570 | |
---|
| 571 | bindingEnergy = transitionManager->Shell(Z, n)->BindingEnergy(); |
---|
| 572 | if (tmin > bindingEnergy) { |
---|
| 573 | rel = std::log(tmin/bindingEnergy); |
---|
| 574 | eAverage += rel - beta2*(tmin - bindingEnergy)/tmax; |
---|
| 575 | cross += 1.0/bindingEnergy - 1.0/tmin - beta2*rel/tmax; |
---|
| 576 | } |
---|
| 577 | if (tmax > tmin) { |
---|
| 578 | cross1 += 1.0/tmin - 1.0/tmax - beta2*std::log(tmax/tmin)/tmax; |
---|
| 579 | } |
---|
| 580 | } |
---|
| 581 | |
---|
| 582 | cross1 *= elDensity; |
---|
| 583 | energy1->push_back(tkin); |
---|
| 584 | ksi1->push_back(cross1); |
---|
| 585 | |
---|
| 586 | if(eAverage > 0.) cross /= eAverage; |
---|
| 587 | else cross = 0.; |
---|
| 588 | |
---|
| 589 | energy->push_back(tkin); |
---|
| 590 | ksi->push_back(cross); |
---|
| 591 | } |
---|
| 592 | G4VDataSetAlgorithm* algo = interp->Clone(); |
---|
| 593 | G4VEMDataSet* set = new G4EMDataSet(Z,energy,ksi,algo,1.,1.); |
---|
| 594 | xsis->AddComponent(set); |
---|
| 595 | G4VDataSetAlgorithm* algo1 = interp1->Clone(); |
---|
| 596 | G4VEMDataSet* set1 = new G4EMDataSet(Z,energy1,ksi1,algo1,1.,1.); |
---|
| 597 | xsis1->AddComponent(set1); |
---|
| 598 | } |
---|
| 599 | if(verboseLevel > 1) { |
---|
| 600 | G4cout << "### Shell inverse cross sections for " |
---|
| 601 | << material->GetName() << G4endl; |
---|
| 602 | xsis->PrintData(); |
---|
| 603 | G4cout << "### Atom cross sections for " |
---|
| 604 | << material->GetName() << G4endl; |
---|
| 605 | xsis1->PrintData(); |
---|
| 606 | } |
---|
| 607 | shellVacancy->AddXsiTable(xsis); |
---|
| 608 | zFluoDataVector.push_back(xsis1); |
---|
| 609 | } |
---|
| 610 | delete bVector; |
---|
| 611 | } |
---|
| 612 | |
---|
| 613 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 614 | |
---|
| 615 | void G4hLowEnergyIonisation::BuildLambdaTable( |
---|
| 616 | const G4ParticleDefinition& aParticleType) |
---|
| 617 | |
---|
| 618 | { |
---|
| 619 | // Build mean free path tables for the delta ray production process |
---|
| 620 | // tables are built for MATERIALS |
---|
| 621 | |
---|
| 622 | if(verboseLevel > 1) { |
---|
| 623 | G4cout << "G4hLowEnergyIonisation::BuildLambdaTable for " |
---|
| 624 | << aParticleType.GetParticleName() << " is started" << G4endl; |
---|
| 625 | } |
---|
| 626 | |
---|
| 627 | |
---|
| 628 | G4double lowEdgeEnergy, value; |
---|
| 629 | charge = aParticleType.GetPDGCharge()/eplus ; |
---|
| 630 | chargeSquare = charge*charge ; |
---|
| 631 | initialMass = aParticleType.GetPDGMass(); |
---|
| 632 | |
---|
| 633 | const G4ProductionCutsTable* theCoupleTable= |
---|
| 634 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
| 635 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
| 636 | |
---|
| 637 | |
---|
| 638 | if (theMeanFreePathTable) { |
---|
| 639 | theMeanFreePathTable->clearAndDestroy(); |
---|
| 640 | delete theMeanFreePathTable; |
---|
| 641 | } |
---|
| 642 | |
---|
| 643 | theMeanFreePathTable = new G4PhysicsTable(numOfCouples); |
---|
| 644 | |
---|
| 645 | // loop for materials |
---|
| 646 | |
---|
| 647 | for (size_t J=0 ; J < numOfCouples; J++) { |
---|
| 648 | |
---|
| 649 | //create physics vector then fill it .... |
---|
| 650 | G4PhysicsLogVector* aVector = new G4PhysicsLogVector(LowestKineticEnergy, |
---|
| 651 | HighestKineticEnergy, |
---|
| 652 | TotBin); |
---|
| 653 | |
---|
| 654 | // compute the (macroscopic) cross section first |
---|
| 655 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(J); |
---|
| 656 | const G4Material* material= couple->GetMaterial(); |
---|
| 657 | |
---|
| 658 | const G4ElementVector* theElementVector = |
---|
| 659 | material->GetElementVector() ; |
---|
| 660 | const G4double* theAtomicNumDensityVector = |
---|
| 661 | material->GetAtomicNumDensityVector(); |
---|
| 662 | const G4int NumberOfElements = material->GetNumberOfElements() ; |
---|
| 663 | |
---|
| 664 | // get the electron kinetic energy cut for the actual material, |
---|
| 665 | // it will be used in ComputeMicroscopicCrossSection |
---|
| 666 | // ( it is the SAME for ALL the ELEMENTS in THIS MATERIAL ) |
---|
| 667 | // ------------------------------------------------------ |
---|
| 668 | |
---|
| 669 | G4double deltaCut = cutForDelta[J]; |
---|
| 670 | |
---|
| 671 | for ( G4int i = 0 ; i < TotBin ; i++ ) { |
---|
| 672 | lowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ; |
---|
| 673 | G4double sigma = 0.0 ; |
---|
| 674 | G4int Z; |
---|
| 675 | |
---|
| 676 | for (G4int iel=0; iel<NumberOfElements; iel++ ) { |
---|
| 677 | Z = (G4int) (*theElementVector)[iel]->GetZ(); |
---|
| 678 | totalCrossSectionMap [Z] = ComputeMicroscopicCrossSection( |
---|
| 679 | aParticleType, |
---|
| 680 | lowEdgeEnergy, |
---|
| 681 | Z, |
---|
| 682 | deltaCut ) ; |
---|
| 683 | sigma += theAtomicNumDensityVector[iel]*ComputeMicroscopicCrossSection( |
---|
| 684 | aParticleType, |
---|
| 685 | lowEdgeEnergy, |
---|
| 686 | Z, |
---|
| 687 | deltaCut ) ; |
---|
| 688 | |
---|
| 689 | } |
---|
| 690 | |
---|
| 691 | // mean free path = 1./macroscopic cross section |
---|
| 692 | |
---|
| 693 | value = sigma<=0 ? DBL_MAX : 1./sigma ; |
---|
| 694 | |
---|
| 695 | aVector->PutValue(i, value) ; |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | theMeanFreePathTable->insert(aVector); |
---|
| 699 | } |
---|
| 700 | |
---|
| 701 | } |
---|
| 702 | |
---|
| 703 | |
---|
| 704 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 705 | |
---|
| 706 | G4double G4hLowEnergyIonisation::ComputeMicroscopicCrossSection( |
---|
| 707 | const G4ParticleDefinition& aParticleType, |
---|
| 708 | G4double kineticEnergy, |
---|
| 709 | G4double atomicNumber, |
---|
| 710 | G4double deltaCutInEnergy) const |
---|
| 711 | { |
---|
| 712 | //****************************************************************** |
---|
| 713 | // cross section formula is OK for spin=0, 1/2, 1 only ! |
---|
| 714 | // ***************************************************************** |
---|
| 715 | |
---|
| 716 | // calculates the microscopic cross section in GEANT4 internal units |
---|
| 717 | // ( it is called for elements , AtomicNumber = z ) |
---|
| 718 | |
---|
| 719 | G4double energy, gamma, beta2, tmax, var; |
---|
| 720 | G4double totalCrossSection = 0.0 ; |
---|
| 721 | |
---|
| 722 | G4double particleMass = initialMass; |
---|
| 723 | |
---|
| 724 | // get particle data ................................... |
---|
| 725 | |
---|
| 726 | energy = kineticEnergy + particleMass; |
---|
| 727 | |
---|
| 728 | // some kinematics...................... |
---|
| 729 | |
---|
| 730 | gamma = energy/particleMass; |
---|
| 731 | beta2 = 1.0 - 1.0/(gamma*gamma); |
---|
| 732 | var = electron_mass_c2/particleMass; |
---|
| 733 | tmax = 2.*electron_mass_c2*(gamma*gamma - 1.)/(1. + 2.*gamma*var + var*var); |
---|
| 734 | |
---|
| 735 | // now you can calculate the total cross section |
---|
| 736 | |
---|
| 737 | if( tmax > deltaCutInEnergy ) { |
---|
| 738 | |
---|
| 739 | var=deltaCutInEnergy/tmax; |
---|
| 740 | totalCrossSection = (1.0 - var*(1.0 - beta2*std::log(var))) / deltaCutInEnergy ; |
---|
| 741 | G4double spin = aParticleType.GetPDGSpin() ; |
---|
| 742 | |
---|
| 743 | // +term for spin=1/2 particle |
---|
| 744 | if( 0.5 == spin ) |
---|
| 745 | totalCrossSection += 0.5 * (tmax - deltaCutInEnergy) / (energy*energy); |
---|
| 746 | |
---|
| 747 | // +term for spin=1 particle |
---|
| 748 | else if( 0.9 < spin ) |
---|
| 749 | totalCrossSection += -std::log(var)/(3.0*deltaCutInEnergy) + |
---|
| 750 | (tmax - deltaCutInEnergy) * ( (5.0+ 1.0/var)*0.25 / (energy*energy) - |
---|
| 751 | beta2 / (tmax * deltaCutInEnergy) ) / 3.0 ; |
---|
| 752 | |
---|
| 753 | totalCrossSection *= twopi_mc2_rcl2 * atomicNumber / beta2 ; |
---|
| 754 | } |
---|
| 755 | |
---|
| 756 | return totalCrossSection ; |
---|
| 757 | } |
---|
| 758 | |
---|
| 759 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 760 | |
---|
| 761 | G4double G4hLowEnergyIonisation::GetMeanFreePath(const G4Track& trackData, |
---|
| 762 | G4double, // previousStepSize |
---|
| 763 | enum G4ForceCondition* condition) |
---|
| 764 | { |
---|
| 765 | const G4DynamicParticle* aParticle = trackData.GetDynamicParticle(); |
---|
| 766 | const G4MaterialCutsCouple* couple = trackData.GetMaterialCutsCouple(); |
---|
| 767 | const G4Material* material = couple->GetMaterial(); |
---|
| 768 | G4double meanFreePath; |
---|
| 769 | G4bool isOutRange ; |
---|
| 770 | |
---|
| 771 | *condition = NotForced ; |
---|
| 772 | |
---|
| 773 | G4double kineticEnergy = (aParticle->GetKineticEnergy())*initialMass/(aParticle->GetMass()); |
---|
| 774 | charge = aParticle->GetCharge()/eplus; |
---|
| 775 | chargeSquare = theIonEffChargeModel->TheValue(aParticle, material); |
---|
| 776 | |
---|
| 777 | if(kineticEnergy < LowestKineticEnergy) meanFreePath = DBL_MAX; |
---|
| 778 | |
---|
| 779 | else { |
---|
| 780 | if(kineticEnergy > HighestKineticEnergy) |
---|
| 781 | kineticEnergy = HighestKineticEnergy; |
---|
| 782 | meanFreePath = (((*theMeanFreePathTable)(couple->GetIndex()))-> |
---|
| 783 | GetValue(kineticEnergy,isOutRange))/chargeSquare; |
---|
| 784 | } |
---|
| 785 | |
---|
| 786 | return meanFreePath ; |
---|
| 787 | } |
---|
| 788 | |
---|
| 789 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 790 | |
---|
| 791 | G4double G4hLowEnergyIonisation::GetConstraints( |
---|
| 792 | const G4DynamicParticle* particle, |
---|
| 793 | const G4MaterialCutsCouple* couple) |
---|
| 794 | { |
---|
| 795 | // returns the Step limit |
---|
| 796 | // dEdx is calculated as well as the range |
---|
| 797 | // based on Effective Charge Approach |
---|
| 798 | |
---|
| 799 | const G4Material* material = couple->GetMaterial(); |
---|
| 800 | G4Proton* theProton = G4Proton::Proton(); |
---|
| 801 | G4AntiProton* theAntiProton = G4AntiProton::AntiProton(); |
---|
| 802 | |
---|
| 803 | G4double stepLimit = 0.0 ; |
---|
| 804 | G4double dx, highEnergy; |
---|
| 805 | |
---|
| 806 | G4double massRatio = proton_mass_c2/(particle->GetMass()) ; |
---|
| 807 | G4double kineticEnergy = particle->GetKineticEnergy() ; |
---|
| 808 | |
---|
| 809 | // Scale the kinetic energy |
---|
| 810 | |
---|
| 811 | G4double tscaled = kineticEnergy*massRatio ; |
---|
| 812 | fBarkas = 0.0; |
---|
| 813 | |
---|
| 814 | if(charge > 0.0) { |
---|
| 815 | |
---|
| 816 | highEnergy = protonHighEnergy ; |
---|
| 817 | |
---|
| 818 | fRangeNow = G4EnergyLossTables::GetRange(theProton, tscaled, couple); |
---|
| 819 | dx = G4EnergyLossTables::GetRange(theProton, highEnergy, couple); |
---|
| 820 | fdEdx = G4EnergyLossTables::GetDEDX(theProton, tscaled, couple) |
---|
| 821 | * chargeSquare ; |
---|
| 822 | |
---|
| 823 | // Correction for positive ions |
---|
| 824 | if(theBarkas && tscaled > highEnergy) { |
---|
| 825 | fBarkas = BarkasTerm(material,tscaled)*std::sqrt(chargeSquare)*chargeSquare |
---|
| 826 | + BlochTerm(material,tscaled,chargeSquare); |
---|
| 827 | } |
---|
| 828 | // Antiprotons and negative hadrons |
---|
| 829 | } else { |
---|
| 830 | |
---|
| 831 | highEnergy = antiProtonHighEnergy ; |
---|
| 832 | fRangeNow = G4EnergyLossTables::GetRange(theAntiProton, tscaled, couple); |
---|
| 833 | dx = G4EnergyLossTables::GetRange(theAntiProton, highEnergy, couple); |
---|
| 834 | fdEdx = G4EnergyLossTables::GetDEDX(theAntiProton, tscaled, couple) |
---|
| 835 | * chargeSquare ; |
---|
| 836 | |
---|
| 837 | if(theBarkas && tscaled > highEnergy) { |
---|
| 838 | fBarkas = -BarkasTerm(material,tscaled)*std::sqrt(chargeSquare)*chargeSquare |
---|
| 839 | + BlochTerm(material,tscaled,chargeSquare); |
---|
| 840 | } |
---|
| 841 | } |
---|
| 842 | /* |
---|
| 843 | const G4Material* mat = couple->GetMaterial(); |
---|
| 844 | G4double fac = gram/(MeV*cm2*mat->GetDensity()); |
---|
| 845 | G4cout << particle->GetDefinition()->GetParticleName() |
---|
| 846 | << " in " << mat->GetName() |
---|
| 847 | << " E(MeV)= " << kineticEnergy/MeV |
---|
| 848 | << " dedx(MeV*cm^2/g)= " << fdEdx*fac |
---|
| 849 | << " barcas(MeV*cm^2/gram)= " << fBarkas*fac |
---|
| 850 | << " Q^2= " << chargeSquare |
---|
| 851 | << G4endl; |
---|
| 852 | */ |
---|
| 853 | // scaling back |
---|
| 854 | fRangeNow /= (chargeSquare*massRatio) ; |
---|
| 855 | dx /= (chargeSquare*massRatio) ; |
---|
| 856 | |
---|
| 857 | stepLimit = fRangeNow ; |
---|
| 858 | G4double r = std::min(finalRange, couple->GetProductionCuts() |
---|
| 859 | ->GetProductionCut(idxG4ElectronCut)); |
---|
| 860 | |
---|
| 861 | if (fRangeNow > r) { |
---|
| 862 | stepLimit = dRoverRange*fRangeNow + r*(1.0 - dRoverRange)*(2.0 - r/fRangeNow); |
---|
| 863 | if (stepLimit > fRangeNow) stepLimit = fRangeNow; |
---|
| 864 | } |
---|
| 865 | // compute the (random) Step limit in standard energy range |
---|
| 866 | if(tscaled > highEnergy ) { |
---|
| 867 | |
---|
| 868 | // add Barkas correction directly to dedx |
---|
| 869 | fdEdx += fBarkas; |
---|
| 870 | |
---|
| 871 | if(stepLimit > fRangeNow - dx*0.9) stepLimit = fRangeNow - dx*0.9 ; |
---|
| 872 | |
---|
| 873 | // Step limit in low energy range |
---|
| 874 | } else { |
---|
| 875 | G4double x = dx*paramStepLimit; |
---|
| 876 | if (stepLimit > x) stepLimit = x; |
---|
| 877 | } |
---|
| 878 | return stepLimit ; |
---|
| 879 | } |
---|
| 880 | |
---|
| 881 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 882 | |
---|
| 883 | G4VParticleChange* G4hLowEnergyIonisation::AlongStepDoIt( |
---|
| 884 | const G4Track& trackData, |
---|
| 885 | const G4Step& stepData) |
---|
| 886 | { |
---|
| 887 | // compute the energy loss after a step |
---|
| 888 | G4Proton* theProton = G4Proton::Proton(); |
---|
| 889 | G4AntiProton* theAntiProton = G4AntiProton::AntiProton(); |
---|
| 890 | G4double finalT = 0.0 ; |
---|
| 891 | |
---|
| 892 | aParticleChange.Initialize(trackData) ; |
---|
| 893 | |
---|
| 894 | const G4MaterialCutsCouple* couple = trackData.GetMaterialCutsCouple(); |
---|
| 895 | const G4Material* material = couple->GetMaterial(); |
---|
| 896 | |
---|
| 897 | // get the actual (true) Step length from stepData |
---|
| 898 | const G4double step = stepData.GetStepLength() ; |
---|
| 899 | |
---|
| 900 | const G4DynamicParticle* particle = trackData.GetDynamicParticle() ; |
---|
| 901 | |
---|
| 902 | G4double kineticEnergy = particle->GetKineticEnergy() ; |
---|
| 903 | G4double massRatio = proton_mass_c2/(particle->GetMass()) ; |
---|
| 904 | G4double tscaled= kineticEnergy*massRatio ; |
---|
| 905 | G4double eloss = 0.0 ; |
---|
| 906 | G4double nloss = 0.0 ; |
---|
| 907 | |
---|
| 908 | |
---|
| 909 | // very small particle energy |
---|
| 910 | if(kineticEnergy < MinKineticEnergy) { |
---|
| 911 | |
---|
| 912 | eloss = kineticEnergy ; |
---|
| 913 | |
---|
| 914 | // particle energy outside tabulated energy range |
---|
| 915 | } else if( kineticEnergy > HighestKineticEnergy) { |
---|
| 916 | eloss = step*fdEdx ; |
---|
| 917 | |
---|
| 918 | // big step |
---|
| 919 | } else if(step >= fRangeNow ) { |
---|
| 920 | eloss = kineticEnergy ; |
---|
| 921 | |
---|
| 922 | // tabulated range |
---|
| 923 | } else { |
---|
| 924 | |
---|
| 925 | // step longer than linear step limit |
---|
| 926 | if(step > linLossLimit*fRangeNow) { |
---|
| 927 | |
---|
| 928 | G4double rscaled= fRangeNow*massRatio*chargeSquare ; |
---|
| 929 | G4double sscaled= step *massRatio*chargeSquare ; |
---|
| 930 | |
---|
| 931 | if(charge > 0.0) { |
---|
| 932 | eloss = G4EnergyLossTables::GetPreciseEnergyFromRange( |
---|
| 933 | theProton,rscaled, couple) - |
---|
| 934 | G4EnergyLossTables::GetPreciseEnergyFromRange( |
---|
| 935 | theProton,rscaled-sscaled,couple) ; |
---|
| 936 | |
---|
| 937 | } else { |
---|
| 938 | eloss = G4EnergyLossTables::GetPreciseEnergyFromRange( |
---|
| 939 | theAntiProton,rscaled,couple) - |
---|
| 940 | G4EnergyLossTables::GetPreciseEnergyFromRange( |
---|
| 941 | theAntiProton,rscaled-sscaled,couple) ; |
---|
| 942 | } |
---|
| 943 | eloss /= massRatio ; |
---|
| 944 | |
---|
| 945 | // Barkas correction at big step |
---|
| 946 | eloss += fBarkas*step; |
---|
| 947 | |
---|
| 948 | // step shorter than linear step limit |
---|
| 949 | } else { |
---|
| 950 | eloss = step*fdEdx ; |
---|
| 951 | } |
---|
| 952 | if(nStopping && tscaled < protonHighEnergy) { |
---|
| 953 | nloss = (theNuclearStoppingModel->TheValue(particle, material))*step; |
---|
| 954 | } |
---|
| 955 | } |
---|
| 956 | |
---|
| 957 | if(eloss < 0.0) eloss = 0.0; |
---|
| 958 | |
---|
| 959 | finalT = kineticEnergy - eloss - nloss; |
---|
| 960 | |
---|
| 961 | if( EnlossFlucFlag && 0.0 < eloss && finalT > MinKineticEnergy) { |
---|
| 962 | |
---|
| 963 | // now the electron loss with fluctuation |
---|
| 964 | eloss = ElectronicLossFluctuation(particle, couple, eloss, step) ; |
---|
| 965 | if(eloss < 0.0) eloss = 0.0; |
---|
| 966 | finalT = kineticEnergy - eloss - nloss; |
---|
| 967 | } |
---|
| 968 | |
---|
| 969 | // stop particle if the kinetic energy <= MinKineticEnergy |
---|
| 970 | if (finalT*massRatio <= MinKineticEnergy ) { |
---|
| 971 | |
---|
| 972 | finalT = 0.0; |
---|
| 973 | if(!particle->GetDefinition()->GetProcessManager()-> |
---|
| 974 | GetAtRestProcessVector()->size()) |
---|
| 975 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 976 | else |
---|
| 977 | aParticleChange.ProposeTrackStatus(fStopButAlive); |
---|
| 978 | } |
---|
| 979 | |
---|
| 980 | aParticleChange.ProposeEnergy( finalT ); |
---|
| 981 | eloss = kineticEnergy-finalT; |
---|
| 982 | |
---|
| 983 | // Deexcitation only of ionised atoms |
---|
| 984 | G4double hMass = particle->GetMass(); |
---|
| 985 | std::vector<G4DynamicParticle*>* newpart = 0; |
---|
| 986 | G4DynamicParticle* part = 0; |
---|
| 987 | |
---|
| 988 | if(theFluo) newpart = DeexciteAtom(couple, kineticEnergy, hMass, eloss); |
---|
| 989 | |
---|
| 990 | if(newpart != 0) { |
---|
| 991 | |
---|
| 992 | size_t nSecondaries = newpart->size(); |
---|
| 993 | aParticleChange.SetNumberOfSecondaries(nSecondaries); |
---|
| 994 | G4Track* newtrack = 0; |
---|
| 995 | const G4StepPoint* preStep = stepData.GetPreStepPoint(); |
---|
| 996 | const G4StepPoint* postStep = stepData.GetPostStepPoint(); |
---|
| 997 | G4ThreeVector r = preStep->GetPosition(); |
---|
| 998 | G4ThreeVector deltaR = postStep->GetPosition(); |
---|
| 999 | deltaR -= r; |
---|
| 1000 | G4double t = preStep->GetGlobalTime(); |
---|
| 1001 | G4double deltaT = postStep->GetGlobalTime(); |
---|
| 1002 | deltaT -= t; |
---|
| 1003 | G4double time, q, e; |
---|
| 1004 | G4ThreeVector position; |
---|
| 1005 | |
---|
| 1006 | for(size_t i=0; i<nSecondaries; i++) { |
---|
| 1007 | |
---|
| 1008 | part = (*newpart)[i]; |
---|
| 1009 | if(part) { |
---|
| 1010 | |
---|
| 1011 | e = part->GetKineticEnergy(); |
---|
| 1012 | if(e <= eloss) { |
---|
| 1013 | |
---|
| 1014 | eloss -= e; |
---|
| 1015 | q = G4UniformRand(); |
---|
| 1016 | time = deltaT*q + t; |
---|
| 1017 | position = deltaR*q; |
---|
| 1018 | position += r; |
---|
| 1019 | newtrack = new G4Track(part, time, position); |
---|
| 1020 | aParticleChange.AddSecondary(newtrack); |
---|
| 1021 | |
---|
| 1022 | } else { |
---|
| 1023 | |
---|
| 1024 | delete part; |
---|
| 1025 | |
---|
| 1026 | } |
---|
| 1027 | } |
---|
| 1028 | } |
---|
| 1029 | delete newpart; |
---|
| 1030 | } |
---|
| 1031 | |
---|
| 1032 | aParticleChange.ProposeLocalEnergyDeposit(eloss); |
---|
| 1033 | return &aParticleChange ; |
---|
| 1034 | } |
---|
| 1035 | |
---|
| 1036 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1037 | |
---|
| 1038 | G4double G4hLowEnergyIonisation::ProtonParametrisedDEDX( |
---|
| 1039 | const G4MaterialCutsCouple* couple, |
---|
| 1040 | G4double kineticEnergy) const |
---|
| 1041 | { |
---|
| 1042 | const G4Material* material = couple->GetMaterial(); |
---|
| 1043 | G4Proton* theProton = G4Proton::Proton(); |
---|
| 1044 | G4double eloss = 0.0; |
---|
| 1045 | |
---|
| 1046 | // Free Electron Gas Model |
---|
| 1047 | if(kineticEnergy < protonLowEnergy) { |
---|
| 1048 | eloss = (theProtonModel->TheValue(theProton, material, protonLowEnergy)) |
---|
| 1049 | * std::sqrt(kineticEnergy/protonLowEnergy) ; |
---|
| 1050 | |
---|
| 1051 | // Parametrisation |
---|
| 1052 | } else { |
---|
| 1053 | eloss = theProtonModel->TheValue(theProton, material, kineticEnergy) ; |
---|
| 1054 | } |
---|
| 1055 | |
---|
| 1056 | // Delta rays energy |
---|
| 1057 | eloss -= DeltaRaysEnergy(couple,kineticEnergy,proton_mass_c2) ; |
---|
| 1058 | |
---|
| 1059 | if(verboseLevel > 2) { |
---|
| 1060 | G4cout << "p E(MeV)= " << kineticEnergy/MeV |
---|
| 1061 | << " dE/dx(MeV/mm)= " << eloss*mm/MeV |
---|
| 1062 | << " for " << material->GetName() |
---|
| 1063 | << " model: " << theProtonModel << G4endl; |
---|
| 1064 | } |
---|
| 1065 | |
---|
| 1066 | if(eloss < 0.0) eloss = 0.0 ; |
---|
| 1067 | |
---|
| 1068 | return eloss ; |
---|
| 1069 | } |
---|
| 1070 | |
---|
| 1071 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1072 | |
---|
| 1073 | G4double G4hLowEnergyIonisation::AntiProtonParametrisedDEDX( |
---|
| 1074 | const G4MaterialCutsCouple* couple, |
---|
| 1075 | G4double kineticEnergy) const |
---|
| 1076 | { |
---|
| 1077 | const G4Material* material = couple->GetMaterial(); |
---|
| 1078 | G4AntiProton* theAntiProton = G4AntiProton::AntiProton(); |
---|
| 1079 | G4double eloss = 0.0 ; |
---|
| 1080 | |
---|
| 1081 | // Antiproton model is used |
---|
| 1082 | if(theAntiProtonModel->IsInCharge(theAntiProton,material)) { |
---|
| 1083 | if(kineticEnergy < antiProtonLowEnergy) { |
---|
| 1084 | eloss = theAntiProtonModel->TheValue(theAntiProton,material,antiProtonLowEnergy) |
---|
| 1085 | * std::sqrt(kineticEnergy/antiProtonLowEnergy) ; |
---|
| 1086 | |
---|
| 1087 | // Parametrisation |
---|
| 1088 | } else { |
---|
| 1089 | eloss = theAntiProtonModel->TheValue(theAntiProton,material, |
---|
| 1090 | kineticEnergy); |
---|
| 1091 | } |
---|
| 1092 | |
---|
| 1093 | // The proton model is used + Barkas correction |
---|
| 1094 | } else { |
---|
| 1095 | if(kineticEnergy < protonLowEnergy) { |
---|
| 1096 | eloss = theProtonModel->TheValue(G4Proton::Proton(),material,protonLowEnergy) |
---|
| 1097 | * std::sqrt(kineticEnergy/protonLowEnergy) ; |
---|
| 1098 | |
---|
| 1099 | // Parametrisation |
---|
| 1100 | } else { |
---|
| 1101 | eloss = theProtonModel->TheValue(G4Proton::Proton(),material, |
---|
| 1102 | kineticEnergy); |
---|
| 1103 | } |
---|
| 1104 | //if(theBarkas) eloss -= 2.0*BarkasTerm(material, kineticEnergy); |
---|
| 1105 | } |
---|
| 1106 | |
---|
| 1107 | // Delta rays energy |
---|
| 1108 | eloss -= DeltaRaysEnergy(couple,kineticEnergy,proton_mass_c2) ; |
---|
| 1109 | |
---|
| 1110 | if(verboseLevel > 2) { |
---|
| 1111 | G4cout << "pbar E(MeV)= " << kineticEnergy/MeV |
---|
| 1112 | << " dE/dx(MeV/mm)= " << eloss*mm/MeV |
---|
| 1113 | << " for " << material->GetName() |
---|
| 1114 | << " model: " << theProtonModel << G4endl; |
---|
| 1115 | } |
---|
| 1116 | |
---|
| 1117 | if(eloss < 0.0) eloss = 0.0 ; |
---|
| 1118 | |
---|
| 1119 | return eloss ; |
---|
| 1120 | } |
---|
| 1121 | |
---|
| 1122 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1123 | |
---|
| 1124 | G4double G4hLowEnergyIonisation::DeltaRaysEnergy( |
---|
| 1125 | const G4MaterialCutsCouple* couple, |
---|
| 1126 | G4double kineticEnergy, |
---|
| 1127 | G4double particleMass) const |
---|
| 1128 | { |
---|
| 1129 | G4double dloss = 0.0 ; |
---|
| 1130 | |
---|
| 1131 | G4double deltaCutNow = cutForDelta[(couple->GetIndex())] ; |
---|
| 1132 | const G4Material* material = couple->GetMaterial(); |
---|
| 1133 | G4double electronDensity = material->GetElectronDensity(); |
---|
| 1134 | G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy(); |
---|
| 1135 | |
---|
| 1136 | G4double tau = kineticEnergy/particleMass ; |
---|
| 1137 | G4double rateMass = electron_mass_c2/particleMass ; |
---|
| 1138 | |
---|
| 1139 | // some local variables |
---|
| 1140 | |
---|
| 1141 | G4double gamma,bg2,beta2,tmax,x ; |
---|
| 1142 | |
---|
| 1143 | gamma = tau + 1.0 ; |
---|
| 1144 | bg2 = tau*(tau+2.0) ; |
---|
| 1145 | beta2 = bg2/(gamma*gamma) ; |
---|
| 1146 | tmax = 2.*electron_mass_c2*bg2/(1.0+2.0*gamma*rateMass+rateMass*rateMass) ; |
---|
| 1147 | |
---|
| 1148 | // Validity range for delta electron cross section |
---|
| 1149 | G4double deltaCut = std::max(deltaCutNow, eexc); |
---|
| 1150 | |
---|
| 1151 | if ( deltaCut < tmax) { |
---|
| 1152 | x = deltaCut / tmax ; |
---|
| 1153 | dloss = ( beta2 * (x - 1.0) - std::log(x) ) * twopi_mc2_rcl2 |
---|
| 1154 | * electronDensity / beta2 ; |
---|
| 1155 | } |
---|
| 1156 | return dloss ; |
---|
| 1157 | } |
---|
| 1158 | |
---|
| 1159 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1160 | |
---|
| 1161 | G4VParticleChange* G4hLowEnergyIonisation::PostStepDoIt( |
---|
| 1162 | const G4Track& trackData, |
---|
| 1163 | const G4Step& stepData) |
---|
| 1164 | { |
---|
| 1165 | // Units are expressed in GEANT4 internal units. |
---|
| 1166 | |
---|
| 1167 | G4double KineticEnergy,TotalEnergy,TotalMomentum,betasquare, |
---|
| 1168 | DeltaKineticEnergy,DeltaTotalMomentum,costheta,sintheta,phi, |
---|
| 1169 | dirx,diry,dirz,finalKineticEnergy,finalPx,finalPy,finalPz, |
---|
| 1170 | x,xc,grej,Psquare,Esquare,rate,finalMomentum ; |
---|
| 1171 | |
---|
| 1172 | aParticleChange.Initialize(trackData) ; |
---|
| 1173 | const G4MaterialCutsCouple* couple = trackData.GetMaterialCutsCouple(); |
---|
| 1174 | |
---|
| 1175 | const G4DynamicParticle* aParticle = trackData.GetDynamicParticle() ; |
---|
| 1176 | |
---|
| 1177 | // some kinematics |
---|
| 1178 | |
---|
| 1179 | ParticleMass=aParticle->GetDefinition()->GetPDGMass(); |
---|
| 1180 | KineticEnergy=aParticle->GetKineticEnergy(); |
---|
| 1181 | TotalEnergy=KineticEnergy + ParticleMass ; |
---|
| 1182 | Psquare=KineticEnergy*(TotalEnergy+ParticleMass) ; |
---|
| 1183 | Esquare=TotalEnergy*TotalEnergy; |
---|
| 1184 | betasquare=Psquare/Esquare; |
---|
| 1185 | G4ThreeVector ParticleDirection = aParticle->GetMomentumDirection() ; |
---|
| 1186 | |
---|
| 1187 | G4double gamma= KineticEnergy/ParticleMass + 1.; |
---|
| 1188 | G4double r = electron_mass_c2/ParticleMass; |
---|
| 1189 | G4double tmax = 2.*electron_mass_c2*(gamma*gamma - 1.)/(1. + 2.*gamma*r + r*r); |
---|
| 1190 | |
---|
| 1191 | // Validity range for delta electron cross section |
---|
| 1192 | G4double DeltaCut = cutForDelta[couple->GetIndex()]; |
---|
| 1193 | |
---|
| 1194 | // This should not be a case |
---|
| 1195 | if(DeltaCut >= tmax) |
---|
| 1196 | return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData); |
---|
| 1197 | |
---|
| 1198 | xc = DeltaCut / tmax; |
---|
| 1199 | rate = tmax / TotalEnergy; |
---|
| 1200 | rate = rate*rate ; |
---|
| 1201 | G4double spin = aParticle->GetDefinition()->GetPDGSpin() ; |
---|
| 1202 | |
---|
| 1203 | // sampling follows ... |
---|
| 1204 | do { |
---|
| 1205 | x=xc/(1.-(1.-xc)*G4UniformRand()); |
---|
| 1206 | |
---|
| 1207 | if(0.0 == spin) { |
---|
| 1208 | grej = 1.0 - betasquare * x ; |
---|
| 1209 | |
---|
| 1210 | } else if (0.5 == spin) { |
---|
| 1211 | grej = (1.0 - betasquare * x + 0.5*x*x*rate) / (1.0 + 0.5 * rate) ; |
---|
| 1212 | |
---|
| 1213 | } else { |
---|
| 1214 | grej = (1.0 - betasquare * x ) * (1.0 + x/ (3.0*xc)) + |
---|
| 1215 | x * x * rate * (1.0 + 0.5 * x / xc) / 3.0 / |
---|
| 1216 | (1.0 + 1.0/(3.0*xc) + rate *(1.0+ 0.5/xc) /3.0) ; |
---|
| 1217 | } |
---|
| 1218 | |
---|
| 1219 | } while( G4UniformRand() > grej ); |
---|
| 1220 | |
---|
| 1221 | |
---|
| 1222 | DeltaKineticEnergy = x * tmax; |
---|
| 1223 | |
---|
| 1224 | DeltaTotalMomentum = std::sqrt(DeltaKineticEnergy * (DeltaKineticEnergy + |
---|
| 1225 | 2. * electron_mass_c2 )) ; |
---|
| 1226 | TotalMomentum = std::sqrt(Psquare) ; |
---|
| 1227 | costheta = DeltaKineticEnergy * (TotalEnergy + electron_mass_c2) |
---|
| 1228 | /(DeltaTotalMomentum * TotalMomentum) ; |
---|
| 1229 | |
---|
| 1230 | // protection against costheta > 1 or < -1 --------------- |
---|
| 1231 | if ( costheta < -1. ) |
---|
| 1232 | costheta = -1. ; |
---|
| 1233 | if ( costheta > +1. ) |
---|
| 1234 | costheta = +1. ; |
---|
| 1235 | |
---|
| 1236 | // direction of the delta electron ........ |
---|
| 1237 | phi = twopi * G4UniformRand() ; |
---|
| 1238 | sintheta = std::sqrt(1. - costheta*costheta); |
---|
| 1239 | dirx = sintheta * std::cos(phi) ; |
---|
| 1240 | diry = sintheta * std::sin(phi) ; |
---|
| 1241 | dirz = costheta ; |
---|
| 1242 | |
---|
| 1243 | G4ThreeVector DeltaDirection(dirx,diry,dirz) ; |
---|
| 1244 | DeltaDirection.rotateUz(ParticleDirection) ; |
---|
| 1245 | |
---|
| 1246 | // create G4DynamicParticle object for delta ray |
---|
| 1247 | G4DynamicParticle *theDeltaRay = new G4DynamicParticle; |
---|
| 1248 | theDeltaRay->SetKineticEnergy( DeltaKineticEnergy ); |
---|
| 1249 | theDeltaRay->SetMomentumDirection(DeltaDirection.x(), |
---|
| 1250 | DeltaDirection.y(), |
---|
| 1251 | DeltaDirection.z()); |
---|
| 1252 | theDeltaRay->SetDefinition(G4Electron::Electron()); |
---|
| 1253 | |
---|
| 1254 | // fill aParticleChange |
---|
| 1255 | finalKineticEnergy = KineticEnergy - DeltaKineticEnergy ; |
---|
| 1256 | |
---|
| 1257 | // Generation of Fluorescence and Auger |
---|
| 1258 | size_t nSecondaries = 0; |
---|
| 1259 | size_t totalNumber = 1; |
---|
| 1260 | std::vector<G4DynamicParticle*>* secondaryVector = 0; |
---|
| 1261 | G4DynamicParticle* aSecondary = 0; |
---|
| 1262 | G4ParticleDefinition* type = 0; |
---|
| 1263 | |
---|
| 1264 | // Select atom and shell |
---|
| 1265 | G4int Z = SelectRandomAtom(couple, KineticEnergy); |
---|
| 1266 | |
---|
| 1267 | // G4cout << "Fluorescence is switched :" << theFluo << G4endl; |
---|
| 1268 | |
---|
[1315] | 1269 | // Fluorescence data start from element 6 |
---|
[819] | 1270 | if(theFluo && Z > 5) { |
---|
| 1271 | |
---|
| 1272 | |
---|
| 1273 | |
---|
[1315] | 1274 | // Atom total cross section |
---|
[819] | 1275 | shellCS->SetTotalCS(totalCrossSectionMap[Z]); |
---|
[1315] | 1276 | |
---|
[819] | 1277 | G4int shell = shellCS->SelectRandomShell(Z, KineticEnergy,ParticleMass,DeltaKineticEnergy); |
---|
| 1278 | |
---|
[1315] | 1279 | if (shell!=-1) { |
---|
| 1280 | |
---|
| 1281 | const G4AtomicShell* atomicShell = |
---|
| 1282 | (G4AtomicTransitionManager::Instance())->Shell(Z, shell); |
---|
| 1283 | G4double bindingEnergy = atomicShell->BindingEnergy(); |
---|
| 1284 | |
---|
| 1285 | if(verboseLevel > 1) { |
---|
| 1286 | G4cout << "PostStep Z= " << Z << " shell= " << shell |
---|
| 1287 | << " bindingE(keV)= " << bindingEnergy/keV |
---|
| 1288 | << " finalE(keV)= " << finalKineticEnergy/keV |
---|
| 1289 | << G4endl; |
---|
| 1290 | } |
---|
| 1291 | |
---|
| 1292 | |
---|
| 1293 | |
---|
| 1294 | if (finalKineticEnergy >= bindingEnergy |
---|
| 1295 | && (bindingEnergy >= minGammaEnergy |
---|
| 1296 | || bindingEnergy >= minElectronEnergy) ) { |
---|
| 1297 | |
---|
| 1298 | G4int shellId = atomicShell->ShellId(); |
---|
| 1299 | secondaryVector = deexcitationManager.GenerateParticles(Z, shellId); |
---|
| 1300 | |
---|
| 1301 | if (secondaryVector != 0) { |
---|
| 1302 | |
---|
| 1303 | nSecondaries = secondaryVector->size(); |
---|
| 1304 | for (size_t i = 0; i<nSecondaries; i++) { |
---|
| 1305 | |
---|
| 1306 | aSecondary = (*secondaryVector)[i]; |
---|
| 1307 | if (aSecondary) { |
---|
| 1308 | |
---|
| 1309 | G4double e = aSecondary->GetKineticEnergy(); |
---|
| 1310 | type = aSecondary->GetDefinition(); |
---|
| 1311 | if (e < finalKineticEnergy && |
---|
| 1312 | ((type == G4Gamma::Gamma() && e > minGammaEnergy ) || |
---|
| 1313 | (type == G4Electron::Electron() && e > minElectronEnergy ))) { |
---|
| 1314 | |
---|
| 1315 | finalKineticEnergy -= e; |
---|
| 1316 | totalNumber++; |
---|
| 1317 | |
---|
| 1318 | } else { |
---|
| 1319 | |
---|
| 1320 | delete aSecondary; |
---|
| 1321 | (*secondaryVector)[i] = 0; |
---|
| 1322 | } |
---|
[819] | 1323 | } |
---|
| 1324 | } |
---|
| 1325 | } |
---|
| 1326 | } |
---|
| 1327 | } |
---|
| 1328 | } |
---|
[1315] | 1329 | |
---|
[819] | 1330 | // Save delta-electrons |
---|
| 1331 | |
---|
| 1332 | G4double edep = 0.0; |
---|
| 1333 | |
---|
| 1334 | if (finalKineticEnergy > MinKineticEnergy) |
---|
| 1335 | { |
---|
| 1336 | finalPx = TotalMomentum*ParticleDirection.x() |
---|
| 1337 | - DeltaTotalMomentum*DeltaDirection.x(); |
---|
| 1338 | finalPy = TotalMomentum*ParticleDirection.y() |
---|
| 1339 | - DeltaTotalMomentum*DeltaDirection.y(); |
---|
| 1340 | finalPz = TotalMomentum*ParticleDirection.z() |
---|
| 1341 | - DeltaTotalMomentum*DeltaDirection.z(); |
---|
| 1342 | finalMomentum = |
---|
| 1343 | std::sqrt(finalPx*finalPx+finalPy*finalPy+finalPz*finalPz) ; |
---|
| 1344 | finalPx /= finalMomentum ; |
---|
| 1345 | finalPy /= finalMomentum ; |
---|
| 1346 | finalPz /= finalMomentum ; |
---|
| 1347 | |
---|
| 1348 | aParticleChange.ProposeMomentumDirection( finalPx,finalPy,finalPz ); |
---|
| 1349 | } |
---|
| 1350 | else |
---|
| 1351 | { |
---|
| 1352 | edep = finalKineticEnergy; |
---|
| 1353 | finalKineticEnergy = 0.; |
---|
| 1354 | aParticleChange.ProposeMomentumDirection(ParticleDirection.x(), |
---|
| 1355 | ParticleDirection.y(),ParticleDirection.z()); |
---|
| 1356 | if(!aParticle->GetDefinition()->GetProcessManager()-> |
---|
| 1357 | GetAtRestProcessVector()->size()) |
---|
| 1358 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 1359 | else |
---|
| 1360 | aParticleChange.ProposeTrackStatus(fStopButAlive); |
---|
| 1361 | } |
---|
| 1362 | |
---|
| 1363 | aParticleChange.ProposeEnergy( finalKineticEnergy ); |
---|
| 1364 | aParticleChange.ProposeLocalEnergyDeposit (edep); |
---|
| 1365 | aParticleChange.SetNumberOfSecondaries(totalNumber); |
---|
| 1366 | aParticleChange.AddSecondary(theDeltaRay); |
---|
| 1367 | |
---|
| 1368 | // Save Fluorescence and Auger |
---|
| 1369 | |
---|
| 1370 | if (secondaryVector) { |
---|
| 1371 | |
---|
| 1372 | for (size_t l = 0; l < nSecondaries; l++) { |
---|
| 1373 | |
---|
| 1374 | aSecondary = (*secondaryVector)[l]; |
---|
| 1375 | if(aSecondary) { |
---|
| 1376 | aParticleChange.AddSecondary(aSecondary); |
---|
| 1377 | } |
---|
| 1378 | } |
---|
| 1379 | delete secondaryVector; |
---|
| 1380 | } |
---|
| 1381 | |
---|
| 1382 | return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData); |
---|
| 1383 | } |
---|
| 1384 | |
---|
| 1385 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1386 | |
---|
[1315] | 1387 | |
---|
| 1388 | |
---|
| 1389 | void G4hLowEnergyIonisation::SelectShellIonisationCS(G4String val) { |
---|
| 1390 | |
---|
| 1391 | if (val == "analytical" ) { |
---|
| 1392 | if (shellCS) delete shellCS; |
---|
| 1393 | shellCS = new G4teoCrossSection(val); |
---|
| 1394 | } |
---|
| 1395 | else if (val == "empirical") { |
---|
| 1396 | if (shellCS) delete shellCS; |
---|
| 1397 | shellCS = new G4empCrossSection(); |
---|
| 1398 | } |
---|
| 1399 | } |
---|
| 1400 | |
---|
| 1401 | |
---|
| 1402 | |
---|
| 1403 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1404 | |
---|
| 1405 | |
---|
| 1406 | std::vector<G4DynamicParticle*>* G4hLowEnergyIonisation::DeexciteAtom(const G4MaterialCutsCouple* couple, |
---|
[819] | 1407 | G4double incidentEnergy, |
---|
| 1408 | G4double hMass, |
---|
| 1409 | G4double eLoss) |
---|
| 1410 | { |
---|
| 1411 | |
---|
| 1412 | if (verboseLevel > 1) { |
---|
| 1413 | G4cout << "DeexciteAtom: cutForPhotons(keV)= " << minGammaEnergy/keV |
---|
| 1414 | << " cutForElectrons(keV)= " << minElectronEnergy/keV |
---|
| 1415 | << " eLoss(MeV)= " << eLoss |
---|
| 1416 | << G4endl; |
---|
| 1417 | } |
---|
| 1418 | |
---|
| 1419 | |
---|
| 1420 | |
---|
| 1421 | if(eLoss < minGammaEnergy && eLoss < minElectronEnergy) return 0; |
---|
| 1422 | |
---|
| 1423 | const G4Material* material = couple->GetMaterial(); |
---|
| 1424 | G4int index = couple->GetIndex(); |
---|
| 1425 | // G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy(); |
---|
| 1426 | G4double gamma = incidentEnergy/hMass + 1; |
---|
| 1427 | G4double beta2 = 1.0 - 1.0/(gamma*gamma); |
---|
| 1428 | G4double r = electron_mass_c2/hMass; |
---|
| 1429 | G4double tmax = 2.*electron_mass_c2*(gamma*gamma - 1.)/(1. + 2.*gamma*r + r*r); |
---|
| 1430 | G4double tcut = std::min(tmax,cutForDelta[index]); |
---|
| 1431 | const G4AtomicTransitionManager* transitionManager = |
---|
| 1432 | G4AtomicTransitionManager::Instance(); |
---|
| 1433 | |
---|
| 1434 | size_t nElements = material->GetNumberOfElements(); |
---|
| 1435 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
| 1436 | G4bool stop = true; |
---|
| 1437 | |
---|
| 1438 | for (size_t j=0; j<nElements; j++) { |
---|
| 1439 | |
---|
| 1440 | G4int Z = (G4int)((*theElementVector)[j]->GetZ()); |
---|
| 1441 | G4double maxE = transitionManager->Shell(Z, 0)->BindingEnergy(); |
---|
| 1442 | |
---|
| 1443 | if (Z > 5 && maxE < tcut && (maxE > minGammaEnergy || maxE > minElectronEnergy) ) { |
---|
| 1444 | stop = false; |
---|
| 1445 | break; |
---|
| 1446 | } |
---|
| 1447 | } |
---|
| 1448 | |
---|
| 1449 | if(stop) return 0; |
---|
| 1450 | |
---|
| 1451 | // create vector of tracks of secondary particles |
---|
| 1452 | |
---|
| 1453 | std::vector<G4DynamicParticle*>* partVector = |
---|
| 1454 | new std::vector<G4DynamicParticle*>; |
---|
| 1455 | std::vector<G4DynamicParticle*>* secVector = 0; |
---|
| 1456 | G4DynamicParticle* aSecondary = 0; |
---|
| 1457 | G4ParticleDefinition* type = 0; |
---|
| 1458 | G4double e, tkin, grej; |
---|
| 1459 | G4ThreeVector position; |
---|
| 1460 | G4int shell, shellId; |
---|
| 1461 | |
---|
| 1462 | // sample secondaries |
---|
| 1463 | |
---|
| 1464 | G4double etot = 0.0; |
---|
| 1465 | std::vector<G4int> n = shellVacancy->GenerateNumberOfIonisations(couple, |
---|
| 1466 | incidentEnergy, eLoss); |
---|
| 1467 | |
---|
| 1468 | for (size_t i=0; i<nElements; i++) { |
---|
| 1469 | |
---|
| 1470 | size_t nVacancies = n[i]; |
---|
| 1471 | G4int Z = (G4int)((*theElementVector)[i]->GetZ()); |
---|
| 1472 | G4double maxE = transitionManager->Shell(Z, 0)->BindingEnergy(); |
---|
| 1473 | |
---|
| 1474 | if (nVacancies && Z > 5 && maxE < tcut && (maxE > minGammaEnergy || maxE > minElectronEnergy)) { |
---|
| 1475 | for(size_t j=0; j<nVacancies; j++) { |
---|
| 1476 | |
---|
| 1477 | // sampling follows |
---|
| 1478 | do { |
---|
| 1479 | tkin = tcut/(1.0 + (tcut/maxE - 1.0)*G4UniformRand()); |
---|
| 1480 | grej = 1.0 - beta2 * tkin/tmax; |
---|
| 1481 | |
---|
| 1482 | } while( G4UniformRand() > grej ); |
---|
| 1483 | |
---|
| 1484 | shell = shellCS->SelectRandomShell(Z,incidentEnergy,hMass,tkin); |
---|
| 1485 | |
---|
| 1486 | shellId = transitionManager->Shell(Z, shell)->ShellId(); |
---|
| 1487 | G4double maxE = transitionManager->Shell(Z, shell)->BindingEnergy(); |
---|
| 1488 | |
---|
| 1489 | if (maxE>minGammaEnergy || maxE>minElectronEnergy ) { |
---|
| 1490 | secVector = deexcitationManager.GenerateParticles(Z, shellId); |
---|
| 1491 | } else { |
---|
| 1492 | secVector = 0; |
---|
| 1493 | } |
---|
| 1494 | |
---|
| 1495 | if (secVector) { |
---|
| 1496 | |
---|
| 1497 | for (size_t l = 0; l<secVector->size(); l++) { |
---|
| 1498 | |
---|
| 1499 | aSecondary = (*secVector)[l]; |
---|
| 1500 | if(aSecondary) { |
---|
| 1501 | |
---|
| 1502 | e = aSecondary->GetKineticEnergy(); |
---|
| 1503 | type = aSecondary->GetDefinition(); |
---|
| 1504 | if ( etot + e <= eLoss && |
---|
[961] | 1505 | ( (type == G4Gamma::Gamma() && e > minGammaEnergy ) || |
---|
| 1506 | (type == G4Electron::Electron() && e > minElectronEnergy) ) ) { |
---|
[819] | 1507 | |
---|
| 1508 | etot += e; |
---|
| 1509 | partVector->push_back(aSecondary); |
---|
| 1510 | |
---|
| 1511 | } else { |
---|
| 1512 | delete aSecondary; |
---|
| 1513 | } |
---|
| 1514 | } |
---|
| 1515 | } |
---|
| 1516 | delete secVector; |
---|
| 1517 | } |
---|
| 1518 | } |
---|
| 1519 | } |
---|
| 1520 | } |
---|
| 1521 | |
---|
| 1522 | if(partVector->empty()) { |
---|
| 1523 | delete partVector; |
---|
| 1524 | return 0; |
---|
| 1525 | } |
---|
| 1526 | |
---|
| 1527 | return partVector; |
---|
| 1528 | } |
---|
| 1529 | |
---|
| 1530 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1531 | |
---|
| 1532 | G4int G4hLowEnergyIonisation::SelectRandomAtom(const G4MaterialCutsCouple* couple, |
---|
| 1533 | G4double kineticEnergy) const |
---|
| 1534 | { |
---|
| 1535 | const G4Material* material = couple->GetMaterial(); |
---|
| 1536 | G4int nElements = material->GetNumberOfElements(); |
---|
| 1537 | G4int Z = 0; |
---|
| 1538 | |
---|
| 1539 | if(nElements == 1) { |
---|
| 1540 | Z = (G4int)(material->GetZ()); |
---|
| 1541 | return Z; |
---|
| 1542 | } |
---|
| 1543 | |
---|
| 1544 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
| 1545 | std::vector<G4double> p; |
---|
| 1546 | G4int index = couple->GetIndex(); |
---|
| 1547 | |
---|
| 1548 | G4double norm = 0.0; |
---|
| 1549 | for (G4int j=0; j<nElements; j++) { |
---|
| 1550 | |
---|
| 1551 | const G4VEMDataSet* set = (zFluoDataVector[index])->GetComponent(j); |
---|
| 1552 | G4double cross = set->FindValue(kineticEnergy); |
---|
| 1553 | |
---|
| 1554 | p.push_back(cross); |
---|
| 1555 | norm += cross; |
---|
| 1556 | } |
---|
| 1557 | |
---|
| 1558 | if(norm == 0.0) return 0; |
---|
| 1559 | |
---|
| 1560 | G4double q = norm*G4UniformRand(); |
---|
| 1561 | |
---|
| 1562 | for (G4int i=0; i<nElements; i++) { |
---|
| 1563 | |
---|
| 1564 | if(p[i] > q) { |
---|
| 1565 | Z = (G4int)((*theElementVector)[i]->GetZ()); |
---|
| 1566 | break; |
---|
| 1567 | } |
---|
| 1568 | q -= p[i]; |
---|
| 1569 | } |
---|
| 1570 | |
---|
| 1571 | return Z; |
---|
| 1572 | } |
---|
| 1573 | |
---|
| 1574 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1575 | |
---|
| 1576 | G4double G4hLowEnergyIonisation::ComputeDEDX( |
---|
| 1577 | const G4ParticleDefinition* aParticle, |
---|
| 1578 | const G4MaterialCutsCouple* couple, |
---|
| 1579 | G4double kineticEnergy) |
---|
| 1580 | { |
---|
| 1581 | const G4Material* material = couple->GetMaterial(); |
---|
| 1582 | G4Proton* theProton = G4Proton::Proton(); |
---|
| 1583 | G4AntiProton* theAntiProton = G4AntiProton::AntiProton(); |
---|
| 1584 | G4double dedx = 0.0 ; |
---|
| 1585 | |
---|
| 1586 | G4double tscaled = kineticEnergy*proton_mass_c2/(aParticle->GetPDGMass()) ; |
---|
| 1587 | charge = aParticle->GetPDGCharge() ; |
---|
| 1588 | |
---|
| 1589 | if(charge>0.0) { |
---|
| 1590 | if(tscaled > protonHighEnergy) { |
---|
| 1591 | dedx=G4EnergyLossTables::GetDEDX(theProton,tscaled,couple) ; |
---|
| 1592 | |
---|
| 1593 | } else { |
---|
| 1594 | dedx=ProtonParametrisedDEDX(couple,tscaled) ; |
---|
| 1595 | } |
---|
| 1596 | |
---|
| 1597 | } else { |
---|
| 1598 | if(tscaled > antiProtonHighEnergy) { |
---|
| 1599 | dedx=G4EnergyLossTables::GetDEDX(theAntiProton,tscaled,couple); |
---|
| 1600 | |
---|
| 1601 | } else { |
---|
| 1602 | dedx=AntiProtonParametrisedDEDX(couple,tscaled) ; |
---|
| 1603 | } |
---|
| 1604 | } |
---|
| 1605 | dedx *= theIonEffChargeModel->TheValue(aParticle, material, kineticEnergy) ; |
---|
| 1606 | |
---|
| 1607 | return dedx ; |
---|
| 1608 | } |
---|
| 1609 | |
---|
| 1610 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1611 | |
---|
| 1612 | G4double G4hLowEnergyIonisation::BarkasTerm(const G4Material* material, |
---|
| 1613 | G4double kineticEnergy) const |
---|
| 1614 | //Function to compute the Barkas term for protons: |
---|
| 1615 | // |
---|
| 1616 | //Ref. Z_1^3 effect in the stopping power of matter for charged particles |
---|
| 1617 | // J.C Ashley and R.H.Ritchie |
---|
| 1618 | // Physical review B Vol.5 No.7 1 April 1972 pagg. 2393-2397 |
---|
| 1619 | // |
---|
| 1620 | { |
---|
| 1621 | static double FTable[47][2] = { |
---|
| 1622 | { 0.02, 21.5}, |
---|
| 1623 | { 0.03, 20.0}, |
---|
| 1624 | { 0.04, 18.0}, |
---|
| 1625 | { 0.05, 15.6}, |
---|
| 1626 | { 0.06, 15.0}, |
---|
| 1627 | { 0.07, 14.0}, |
---|
| 1628 | { 0.08, 13.5}, |
---|
| 1629 | { 0.09, 13.}, |
---|
| 1630 | { 0.1, 12.2}, |
---|
| 1631 | { 0.2, 9.25}, |
---|
| 1632 | { 0.3, 7.0}, |
---|
| 1633 | { 0.4, 6.0}, |
---|
| 1634 | { 0.5, 4.5}, |
---|
| 1635 | { 0.6, 3.5}, |
---|
| 1636 | { 0.7, 3.0}, |
---|
| 1637 | { 0.8, 2.5}, |
---|
| 1638 | { 0.9, 2.0}, |
---|
| 1639 | { 1.0, 1.7}, |
---|
| 1640 | { 1.2, 1.2}, |
---|
| 1641 | { 1.3, 1.0}, |
---|
| 1642 | { 1.4, 0.86}, |
---|
| 1643 | { 1.5, 0.7}, |
---|
| 1644 | { 1.6, 0.61}, |
---|
| 1645 | { 1.7, 0.52}, |
---|
| 1646 | { 1.8, 0.5}, |
---|
| 1647 | { 1.9, 0.43}, |
---|
| 1648 | { 2.0, 0.42}, |
---|
| 1649 | { 2.1, 0.3}, |
---|
| 1650 | { 2.4, 0.2}, |
---|
| 1651 | { 3.0, 0.13}, |
---|
| 1652 | { 3.08, 0.1}, |
---|
| 1653 | { 3.1, 0.09}, |
---|
| 1654 | { 3.3, 0.08}, |
---|
| 1655 | { 3.5, 0.07}, |
---|
| 1656 | { 3.8, 0.06}, |
---|
| 1657 | { 4.0, 0.051}, |
---|
| 1658 | { 4.1, 0.04}, |
---|
| 1659 | { 4.8, 0.03}, |
---|
| 1660 | { 5.0, 0.024}, |
---|
| 1661 | { 5.1, 0.02}, |
---|
| 1662 | { 6.0, 0.013}, |
---|
| 1663 | { 6.5, 0.01}, |
---|
| 1664 | { 7.0, 0.009}, |
---|
| 1665 | { 7.1, 0.008}, |
---|
| 1666 | { 8.0, 0.006}, |
---|
| 1667 | { 9.0, 0.0032}, |
---|
| 1668 | { 10.0, 0.0025} }; |
---|
| 1669 | |
---|
| 1670 | // Information on particle and material |
---|
| 1671 | G4double kinE = kineticEnergy ; |
---|
| 1672 | if(0.5*MeV > kinE) kinE = 0.5*MeV ; |
---|
| 1673 | G4double gamma = 1.0 + kinE / proton_mass_c2 ; |
---|
| 1674 | G4double beta2 = 1.0 - 1.0/(gamma*gamma) ; |
---|
| 1675 | if(0.0 >= beta2) return 0.0; |
---|
| 1676 | |
---|
| 1677 | G4double BarkasTerm = 0.0; |
---|
| 1678 | G4double AMaterial = 0.0; |
---|
| 1679 | G4double ZMaterial = 0.0; |
---|
| 1680 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
| 1681 | G4int numberOfElements = material->GetNumberOfElements(); |
---|
| 1682 | |
---|
| 1683 | for (G4int i = 0; i<numberOfElements; i++) { |
---|
| 1684 | |
---|
| 1685 | AMaterial = (*theElementVector)[i]->GetA()*mole/g; |
---|
| 1686 | ZMaterial = (*theElementVector)[i]->GetZ(); |
---|
| 1687 | |
---|
| 1688 | G4double X = 137.0 * 137.0 * beta2 / ZMaterial; |
---|
| 1689 | |
---|
| 1690 | // Variables to compute L_1 |
---|
| 1691 | G4double Eta0Chi = 0.8; |
---|
| 1692 | G4double EtaChi = Eta0Chi * ( 1.0 + 6.02*std::pow( ZMaterial,-1.19 ) ); |
---|
| 1693 | G4double W = ( EtaChi * std::pow( ZMaterial,1.0/6.0 ) ) / std::sqrt(X); |
---|
| 1694 | G4double FunctionOfW = FTable[46][1]*FTable[46][0]/W ; |
---|
| 1695 | |
---|
| 1696 | for(G4int j=0; j<47; j++) { |
---|
| 1697 | |
---|
| 1698 | if( W < FTable[j][0] ) { |
---|
| 1699 | |
---|
| 1700 | if(0 == j) { |
---|
| 1701 | FunctionOfW = FTable[0][1] ; |
---|
| 1702 | |
---|
| 1703 | } else { |
---|
| 1704 | FunctionOfW = (FTable[j][1] - FTable[j-1][1]) * (W - FTable[j-1][0]) |
---|
| 1705 | / (FTable[j][0] - FTable[j-1][0]) |
---|
| 1706 | + FTable[j-1][1] ; |
---|
| 1707 | } |
---|
| 1708 | |
---|
| 1709 | break; |
---|
| 1710 | } |
---|
| 1711 | |
---|
| 1712 | } |
---|
| 1713 | |
---|
| 1714 | BarkasTerm += FunctionOfW /( std::sqrt(ZMaterial * X) * X); |
---|
| 1715 | } |
---|
| 1716 | |
---|
| 1717 | BarkasTerm *= twopi_mc2_rcl2 * (material->GetElectronDensity()) / beta2 ; |
---|
| 1718 | |
---|
| 1719 | return BarkasTerm; |
---|
| 1720 | } |
---|
| 1721 | |
---|
| 1722 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1723 | |
---|
| 1724 | G4double G4hLowEnergyIonisation::BlochTerm(const G4Material* material, |
---|
| 1725 | G4double kineticEnergy, |
---|
| 1726 | G4double cSquare) const |
---|
| 1727 | //Function to compute the Bloch term for protons: |
---|
| 1728 | // |
---|
| 1729 | //Ref. Z_1^3 effect in the stopping power of matter for charged particles |
---|
| 1730 | // J.C Ashley and R.H.Ritchie |
---|
| 1731 | // Physical review B Vol.5 No.7 1 April 1972 pagg. 2393-2397 |
---|
| 1732 | // |
---|
| 1733 | { |
---|
| 1734 | G4double eloss = 0.0 ; |
---|
| 1735 | G4double gamma = 1.0 + kineticEnergy / proton_mass_c2 ; |
---|
| 1736 | G4double beta2 = 1.0 - 1.0/(gamma*gamma) ; |
---|
| 1737 | G4double y = cSquare / (137.0*137.0*beta2) ; |
---|
| 1738 | |
---|
| 1739 | if(y < 0.05) { |
---|
| 1740 | eloss = 1.202 ; |
---|
| 1741 | |
---|
| 1742 | } else { |
---|
| 1743 | eloss = 1.0 / (1.0 + y) ; |
---|
| 1744 | G4double de = eloss ; |
---|
| 1745 | |
---|
| 1746 | for(G4int i=2; de>eloss*0.01; i++) { |
---|
| 1747 | de = 1.0/( i * (i*i + y)) ; |
---|
| 1748 | eloss += de ; |
---|
| 1749 | } |
---|
| 1750 | } |
---|
| 1751 | eloss *= -1.0 * y * cSquare * twopi_mc2_rcl2 * |
---|
| 1752 | (material->GetElectronDensity()) / beta2 ; |
---|
| 1753 | |
---|
| 1754 | return eloss; |
---|
| 1755 | } |
---|
| 1756 | |
---|
| 1757 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1758 | |
---|
| 1759 | G4double G4hLowEnergyIonisation::ElectronicLossFluctuation( |
---|
| 1760 | const G4DynamicParticle* particle, |
---|
| 1761 | const G4MaterialCutsCouple* couple, |
---|
| 1762 | G4double meanLoss, |
---|
| 1763 | G4double step) const |
---|
| 1764 | // calculate actual loss from the mean loss |
---|
| 1765 | // The model used to get the fluctuation is essentially the same |
---|
| 1766 | // as in Glandz in Geant3. |
---|
| 1767 | { |
---|
| 1768 | // data members to speed up the fluctuation calculation |
---|
| 1769 | // G4int imat ; |
---|
| 1770 | // G4double f1Fluct,f2Fluct,e1Fluct,e2Fluct,rateFluct,ipotFluct; |
---|
| 1771 | // G4double e1LogFluct,e2LogFluct,ipotLogFluct; |
---|
| 1772 | |
---|
| 1773 | static const G4double minLoss = 1.*eV ; |
---|
| 1774 | static const G4double kappa = 10. ; |
---|
| 1775 | static const G4double theBohrBeta2 = 50.0 * keV/proton_mass_c2 ; |
---|
| 1776 | |
---|
| 1777 | const G4Material* material = couple->GetMaterial(); |
---|
| 1778 | G4int imaterial = couple->GetIndex() ; |
---|
| 1779 | G4double ipotFluct = material->GetIonisation()->GetMeanExcitationEnergy() ; |
---|
| 1780 | G4double electronDensity = material->GetElectronDensity() ; |
---|
| 1781 | G4double zeff = electronDensity/(material->GetTotNbOfAtomsPerVolume()) ; |
---|
| 1782 | |
---|
| 1783 | // get particle data |
---|
| 1784 | G4double tkin = particle->GetKineticEnergy(); |
---|
| 1785 | G4double particleMass = particle->GetMass() ; |
---|
| 1786 | G4double deltaCutInKineticEnergyNow = cutForDelta[imaterial]; |
---|
| 1787 | |
---|
| 1788 | // shortcut for very very small loss |
---|
| 1789 | if(meanLoss < minLoss) return meanLoss ; |
---|
| 1790 | |
---|
| 1791 | // Validity range for delta electron cross section |
---|
| 1792 | G4double threshold = std::max(deltaCutInKineticEnergyNow,ipotFluct); |
---|
| 1793 | G4double loss, siga; |
---|
| 1794 | |
---|
| 1795 | G4double rmass = electron_mass_c2/particleMass; |
---|
| 1796 | G4double tau = tkin/particleMass; |
---|
| 1797 | G4double tau1 = tau+1.0; |
---|
| 1798 | G4double tau2 = tau*(tau+2.); |
---|
| 1799 | G4double tmax = 2.*electron_mass_c2*tau2/(1.+2.*tau1*rmass+rmass*rmass); |
---|
| 1800 | |
---|
| 1801 | |
---|
| 1802 | if(tmax > threshold) tmax = threshold; |
---|
| 1803 | G4double beta2 = tau2/(tau1*tau1); |
---|
| 1804 | |
---|
| 1805 | // Gaussian fluctuation |
---|
| 1806 | if(meanLoss > kappa*tmax || tmax < kappa*ipotFluct ) |
---|
| 1807 | { |
---|
| 1808 | siga = tmax * (1.0-0.5*beta2) * step * twopi_mc2_rcl2 |
---|
| 1809 | * electronDensity / beta2 ; |
---|
| 1810 | |
---|
| 1811 | // High velocity or negatively charged particle |
---|
| 1812 | if( beta2 > 3.0*theBohrBeta2*zeff || charge < 0.0) { |
---|
| 1813 | siga = std::sqrt( siga * chargeSquare ) ; |
---|
| 1814 | |
---|
| 1815 | // Low velocity - additional ion charge fluctuations according to |
---|
| 1816 | // Q.Yang et al., NIM B61(1991)149-155. |
---|
| 1817 | } else { |
---|
| 1818 | G4double chu = theIonChuFluctuationModel->TheValue(particle, material); |
---|
| 1819 | G4double yang = theIonYangFluctuationModel->TheValue(particle, material); |
---|
| 1820 | siga = std::sqrt( siga * (chargeSquare * chu + yang)) ; |
---|
| 1821 | } |
---|
| 1822 | |
---|
| 1823 | do { |
---|
| 1824 | loss = G4RandGauss::shoot(meanLoss,siga); |
---|
| 1825 | } while (loss < 0. || loss > 2.0*meanLoss); |
---|
| 1826 | return loss; |
---|
| 1827 | } |
---|
| 1828 | |
---|
| 1829 | // Non Gaussian fluctuation |
---|
| 1830 | static const G4double probLim = 0.01 ; |
---|
| 1831 | static const G4double sumaLim = -std::log(probLim) ; |
---|
| 1832 | static const G4double alim = 10.; |
---|
| 1833 | |
---|
| 1834 | G4double suma,w1,w2,C,e0,lossc,w; |
---|
| 1835 | G4double a1,a2,a3; |
---|
| 1836 | G4int p1,p2,p3; |
---|
| 1837 | G4int nb; |
---|
| 1838 | G4double corrfac, na,alfa,rfac,namean,sa,alfa1,ea,sea; |
---|
| 1839 | G4double dp3; |
---|
| 1840 | |
---|
| 1841 | G4double f1Fluct = material->GetIonisation()->GetF1fluct(); |
---|
| 1842 | G4double f2Fluct = material->GetIonisation()->GetF2fluct(); |
---|
| 1843 | G4double e1Fluct = material->GetIonisation()->GetEnergy1fluct(); |
---|
| 1844 | G4double e2Fluct = material->GetIonisation()->GetEnergy2fluct(); |
---|
| 1845 | G4double e1LogFluct = material->GetIonisation()->GetLogEnergy1fluct(); |
---|
| 1846 | G4double e2LogFluct = material->GetIonisation()->GetLogEnergy2fluct(); |
---|
| 1847 | G4double rateFluct = material->GetIonisation()->GetRateionexcfluct(); |
---|
| 1848 | G4double ipotLogFluct= material->GetIonisation()->GetLogMeanExcEnergy(); |
---|
| 1849 | |
---|
| 1850 | w1 = tmax/ipotFluct; |
---|
| 1851 | w2 = std::log(2.*electron_mass_c2*tau2); |
---|
| 1852 | |
---|
| 1853 | C = meanLoss*(1.-rateFluct)/(w2-ipotLogFluct-beta2); |
---|
| 1854 | |
---|
| 1855 | a1 = C*f1Fluct*(w2-e1LogFluct-beta2)/e1Fluct; |
---|
| 1856 | a2 = C*f2Fluct*(w2-e2LogFluct-beta2)/e2Fluct; |
---|
| 1857 | a3 = rateFluct*meanLoss*(tmax-ipotFluct)/(ipotFluct*tmax*std::log(w1)); |
---|
| 1858 | if(a1 < 0.0) a1 = 0.0; |
---|
| 1859 | if(a2 < 0.0) a2 = 0.0; |
---|
| 1860 | if(a3 < 0.0) a3 = 0.0; |
---|
| 1861 | |
---|
| 1862 | suma = a1+a2+a3; |
---|
| 1863 | |
---|
| 1864 | loss = 0.; |
---|
| 1865 | |
---|
| 1866 | |
---|
| 1867 | if(suma < sumaLim) // very small Step |
---|
| 1868 | { |
---|
| 1869 | e0 = material->GetIonisation()->GetEnergy0fluct(); |
---|
| 1870 | |
---|
| 1871 | if(tmax == ipotFluct) |
---|
| 1872 | { |
---|
| 1873 | a3 = meanLoss/e0; |
---|
| 1874 | |
---|
| 1875 | if(a3>alim) |
---|
| 1876 | { |
---|
| 1877 | siga=std::sqrt(a3) ; |
---|
| 1878 | p3 = std::max(0,G4int(G4RandGauss::shoot(a3,siga)+0.5)); |
---|
| 1879 | } |
---|
| 1880 | else |
---|
| 1881 | p3 = G4Poisson(a3); |
---|
| 1882 | |
---|
| 1883 | loss = p3*e0 ; |
---|
| 1884 | |
---|
| 1885 | if(p3 > 0) |
---|
| 1886 | loss += (1.-2.*G4UniformRand())*e0 ; |
---|
| 1887 | |
---|
| 1888 | } |
---|
| 1889 | else |
---|
| 1890 | { |
---|
| 1891 | tmax = tmax-ipotFluct+e0 ; |
---|
| 1892 | a3 = meanLoss*(tmax-e0)/(tmax*e0*std::log(tmax/e0)); |
---|
| 1893 | |
---|
| 1894 | if(a3>alim) |
---|
| 1895 | { |
---|
| 1896 | siga=std::sqrt(a3) ; |
---|
| 1897 | p3 = std::max(0,int(G4RandGauss::shoot(a3,siga)+0.5)); |
---|
| 1898 | } |
---|
| 1899 | else |
---|
| 1900 | p3 = G4Poisson(a3); |
---|
| 1901 | |
---|
| 1902 | if(p3 > 0) |
---|
| 1903 | { |
---|
| 1904 | w = (tmax-e0)/tmax ; |
---|
| 1905 | if(p3 > nmaxCont2) |
---|
| 1906 | { |
---|
| 1907 | dp3 = G4float(p3) ; |
---|
| 1908 | corrfac = dp3/G4float(nmaxCont2) ; |
---|
| 1909 | p3 = nmaxCont2 ; |
---|
| 1910 | } |
---|
| 1911 | else |
---|
| 1912 | corrfac = 1. ; |
---|
| 1913 | |
---|
| 1914 | for(G4int i=0; i<p3; i++) loss += 1./(1.-w*G4UniformRand()) ; |
---|
| 1915 | loss *= e0*corrfac ; |
---|
| 1916 | } |
---|
| 1917 | } |
---|
| 1918 | } |
---|
| 1919 | |
---|
| 1920 | else // not so small Step |
---|
| 1921 | { |
---|
| 1922 | // excitation type 1 |
---|
| 1923 | if(a1>alim) |
---|
| 1924 | { |
---|
| 1925 | siga=std::sqrt(a1) ; |
---|
| 1926 | p1 = std::max(0,G4int(G4RandGauss::shoot(a1,siga)+0.5)); |
---|
| 1927 | } |
---|
| 1928 | else |
---|
| 1929 | p1 = G4Poisson(a1); |
---|
| 1930 | |
---|
| 1931 | // excitation type 2 |
---|
| 1932 | if(a2>alim) |
---|
| 1933 | { |
---|
| 1934 | siga=std::sqrt(a2) ; |
---|
| 1935 | p2 = std::max(0,G4int(G4RandGauss::shoot(a2,siga)+0.5)); |
---|
| 1936 | } |
---|
| 1937 | else |
---|
| 1938 | p2 = G4Poisson(a2); |
---|
| 1939 | |
---|
| 1940 | loss = p1*e1Fluct+p2*e2Fluct; |
---|
| 1941 | |
---|
| 1942 | // smearing to avoid unphysical peaks |
---|
| 1943 | if(p2 > 0) |
---|
| 1944 | loss += (1.-2.*G4UniformRand())*e2Fluct; |
---|
| 1945 | else if (loss>0.) |
---|
| 1946 | loss += (1.-2.*G4UniformRand())*e1Fluct; |
---|
| 1947 | |
---|
| 1948 | // ionisation ....................................... |
---|
| 1949 | if(a3 > 0.) |
---|
| 1950 | { |
---|
| 1951 | if(a3>alim) |
---|
| 1952 | { |
---|
| 1953 | siga=std::sqrt(a3) ; |
---|
| 1954 | p3 = std::max(0,G4int(G4RandGauss::shoot(a3,siga)+0.5)); |
---|
| 1955 | } |
---|
| 1956 | else |
---|
| 1957 | p3 = G4Poisson(a3); |
---|
| 1958 | |
---|
| 1959 | lossc = 0.; |
---|
| 1960 | if(p3 > 0) |
---|
| 1961 | { |
---|
| 1962 | na = 0.; |
---|
| 1963 | alfa = 1.; |
---|
| 1964 | if (p3 > nmaxCont2) |
---|
| 1965 | { |
---|
| 1966 | dp3 = G4float(p3); |
---|
| 1967 | rfac = dp3/(G4float(nmaxCont2)+dp3); |
---|
| 1968 | namean = G4float(p3)*rfac; |
---|
| 1969 | sa = G4float(nmaxCont1)*rfac; |
---|
| 1970 | na = G4RandGauss::shoot(namean,sa); |
---|
| 1971 | if (na > 0.) |
---|
| 1972 | { |
---|
| 1973 | alfa = w1*G4float(nmaxCont2+p3)/ |
---|
| 1974 | (w1*G4float(nmaxCont2)+G4float(p3)); |
---|
| 1975 | alfa1 = alfa*std::log(alfa)/(alfa-1.); |
---|
| 1976 | ea = na*ipotFluct*alfa1; |
---|
| 1977 | sea = ipotFluct*std::sqrt(na*(alfa-alfa1*alfa1)); |
---|
| 1978 | lossc += G4RandGauss::shoot(ea,sea); |
---|
| 1979 | } |
---|
| 1980 | } |
---|
| 1981 | |
---|
| 1982 | nb = G4int(G4float(p3)-na); |
---|
| 1983 | if (nb > 0) |
---|
| 1984 | { |
---|
| 1985 | w2 = alfa*ipotFluct; |
---|
| 1986 | w = (tmax-w2)/tmax; |
---|
| 1987 | for (G4int k=0; k<nb; k++) lossc += w2/(1.-w*G4UniformRand()); |
---|
| 1988 | } |
---|
| 1989 | } |
---|
| 1990 | loss += lossc; |
---|
| 1991 | } |
---|
| 1992 | } |
---|
| 1993 | |
---|
| 1994 | return loss ; |
---|
| 1995 | } |
---|
| 1996 | |
---|
| 1997 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 1998 | |
---|
| 1999 | void G4hLowEnergyIonisation::SetCutForSecondaryPhotons(G4double cut) |
---|
| 2000 | { |
---|
| 2001 | minGammaEnergy = cut; |
---|
| 2002 | } |
---|
| 2003 | |
---|
| 2004 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 2005 | |
---|
| 2006 | void G4hLowEnergyIonisation::SetCutForAugerElectrons(G4double cut) |
---|
| 2007 | { |
---|
| 2008 | minElectronEnergy = cut; |
---|
| 2009 | } |
---|
| 2010 | |
---|
| 2011 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 2012 | |
---|
| 2013 | void G4hLowEnergyIonisation::ActivateAugerElectronProduction(G4bool val) |
---|
| 2014 | { |
---|
| 2015 | deexcitationManager.ActivateAugerElectronProduction(val); |
---|
| 2016 | } |
---|
| 2017 | |
---|
| 2018 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 2019 | |
---|
| 2020 | void G4hLowEnergyIonisation::PrintInfoDefinition() const |
---|
| 2021 | { |
---|
| 2022 | G4String comments = " Knock-on electron cross sections . "; |
---|
| 2023 | comments += "\n Good description above the mean excitation energy.\n"; |
---|
| 2024 | comments += " Delta ray energy sampled from differential Xsection."; |
---|
| 2025 | |
---|
| 2026 | G4cout << G4endl << GetProcessName() << ": " << comments |
---|
| 2027 | << "\n PhysicsTables from " << LowestKineticEnergy / eV << " eV " |
---|
| 2028 | << " to " << HighestKineticEnergy / TeV << " TeV " |
---|
| 2029 | << " in " << TotBin << " bins." |
---|
| 2030 | << "\n Electronic stopping power model is " |
---|
| 2031 | << theProtonTable |
---|
| 2032 | << "\n from " << protonLowEnergy / keV << " keV " |
---|
| 2033 | << " to " << protonHighEnergy / MeV << " MeV " << "." << G4endl ; |
---|
| 2034 | G4cout << "\n Parametrisation model for antiprotons is " |
---|
| 2035 | << theAntiProtonTable |
---|
| 2036 | << "\n from " << antiProtonLowEnergy / keV << " keV " |
---|
| 2037 | << " to " << antiProtonHighEnergy / MeV << " MeV " << "." << G4endl ; |
---|
| 2038 | if(theBarkas){ |
---|
| 2039 | G4cout << " Parametrization of the Barkas effect is switched on." |
---|
| 2040 | << G4endl ; |
---|
| 2041 | } |
---|
| 2042 | if(nStopping) { |
---|
| 2043 | G4cout << " Nuclear stopping power model is " << theNuclearTable |
---|
| 2044 | << G4endl ; |
---|
| 2045 | } |
---|
| 2046 | |
---|
| 2047 | G4bool printHead = true; |
---|
| 2048 | |
---|
| 2049 | const G4ProductionCutsTable* theCoupleTable= |
---|
| 2050 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
| 2051 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
| 2052 | |
---|
| 2053 | // loop for materials |
---|
| 2054 | |
---|
| 2055 | for (size_t j=0 ; j < numOfCouples; j++) { |
---|
| 2056 | |
---|
| 2057 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
---|
| 2058 | const G4Material* material= couple->GetMaterial(); |
---|
| 2059 | G4double deltaCutNow = cutForDelta[(couple->GetIndex())] ; |
---|
| 2060 | G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy(); |
---|
| 2061 | |
---|
| 2062 | if(eexc > deltaCutNow) { |
---|
| 2063 | if(printHead) { |
---|
| 2064 | printHead = false ; |
---|
| 2065 | |
---|
| 2066 | G4cout << " material min.delta energy(keV) " << G4endl; |
---|
| 2067 | G4cout << G4endl; |
---|
| 2068 | } |
---|
| 2069 | |
---|
| 2070 | G4cout << std::setw(20) << material->GetName() |
---|
| 2071 | << std::setw(15) << eexc/keV << G4endl; |
---|
| 2072 | } |
---|
| 2073 | } |
---|
| 2074 | } |
---|