[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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[1192] | 26 | // $Id: G4LowEnergyIonisation.cc,v 1.106 2009/06/11 15:47:08 mantero Exp $ |
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[1228] | 27 | // GEANT4 tag $Name: geant4-09-03 $ |
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[819] | 28 | // |
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| 29 | // -------------------------------------------------------------- |
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| 30 | // |
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| 31 | // File name: G4LowEnergyIonisation |
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| 32 | // |
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| 33 | // Author: Alessandra Forti, Vladimir Ivanchenko |
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| 34 | // |
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| 35 | // Creation date: March 1999 |
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| 36 | // |
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| 37 | // Modifications: |
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| 38 | // - 11.04.2000 VL |
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| 39 | // Changing use of float and G4float casts to G4double casts |
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| 40 | // because of problems with optimisation (bug ?) |
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| 41 | // 10.04.2000 VL |
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| 42 | // - Correcting Fluorescence transition probabilities in order to take into account |
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| 43 | // non-radiative transitions. No Auger electron simulated yet: energy is locally deposited. |
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| 44 | // 10.04.2000 VL |
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| 45 | // - Correction of incident electron final momentum direction |
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| 46 | // 07.04.2000 VL+LU |
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| 47 | // - First implementation of continuous energy loss |
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| 48 | // 22.03.2000 VL |
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| 49 | // - 1 bug corrected in SelectRandomAtom method (units) |
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| 50 | // 17.02.2000 Veronique Lefebure |
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| 51 | // - 5 bugs corrected: |
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| 52 | // *in Fluorescence, 2 bugs affecting |
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| 53 | // . localEnergyDeposition and |
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| 54 | // . number of emitted photons that was then always 1 less |
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| 55 | // *in EnergySampling method: |
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| 56 | // . expon = Parms[13]+1; (instead of uncorrect -1) |
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| 57 | // . rejection /= Parms[6];(instead of uncorrect Parms[7]) |
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| 58 | // . Parms[6] is apparently corrupted in the data file (often = 0) |
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| 59 | // -->Compute normalisation into local variable rejectionMax |
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| 60 | // and use rejectionMax in stead of Parms[6] |
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| 61 | // |
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| 62 | // Added Livermore data table construction methods A. Forti |
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| 63 | // Modified BuildMeanFreePath to read new data tables A. Forti |
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| 64 | // Added EnergySampling method A. Forti |
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| 65 | // Modified PostStepDoIt to insert sampling with EEDL data A. Forti |
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| 66 | // Added SelectRandomAtom A. Forti |
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| 67 | // Added map of the elements A. Forti |
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| 68 | // 20.09.00 V.Ivanchenko update fluctuations |
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| 69 | // 24.04.01 V.Ivanchenko remove RogueWave |
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| 70 | // 22.05.01 V.Ivanchenko update calculation of delta-ray kinematic + |
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| 71 | // clean up the code |
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| 72 | // 02.08.01 V.Ivanchenko fix energy conservation for small steps |
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| 73 | // 18.08.01 V.Ivanchenko fix energy conservation for pathalogical delta-energy |
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| 74 | // 01.10.01 E. Guardincerri Replaced fluorescence generation in PostStepDoIt |
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| 75 | // according to design iteration |
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| 76 | // 04.10.01 MGP Minor clean-up in the fluo section, removal of |
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| 77 | // compilation warnings and extra protection to |
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| 78 | // prevent from accessing a null pointer |
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| 79 | // 29.09.01 V.Ivanchenko revision based on design iteration |
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| 80 | // 10.10.01 MGP Revision to improve code quality and |
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| 81 | // consistency with design |
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| 82 | // 18.10.01 V.Ivanchenko Add fluorescence AlongStepDoIt |
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| 83 | // 18.10.01 MGP Revision to improve code quality and |
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| 84 | // consistency with design |
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| 85 | // 19.10.01 V.Ivanchenko update according to new design, V.Ivanchenko |
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| 86 | // 26.10.01 V.Ivanchenko clean up deexcitation |
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| 87 | // 28.10.01 V.Ivanchenko update printout |
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| 88 | // 29.11.01 V.Ivanchenko New parametrisation introduced |
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| 89 | // 25.03.02 V.Ivanchneko Fix in fluorescence |
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| 90 | // 28.03.02 V.Ivanchenko Add flag of fluorescence |
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| 91 | // 28.05.02 V.Ivanchenko Remove flag fStopAndKill |
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| 92 | // 31.05.02 V.Ivanchenko Add path of Fluo + Auger cuts to |
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| 93 | // AtomicDeexcitation |
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| 94 | // 03.06.02 MGP Restore fStopAndKill |
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| 95 | // 19.06.02 VI Additional printout |
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| 96 | // 30.07.02 VI Fix in restricted energy loss |
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| 97 | // 20.09.02 VI Remove ActivateFlurescence from SetCut... |
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| 98 | // 21.01.03 VI Cut per region |
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| 99 | // 12.02.03 VI Change signature for Deexcitation |
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| 100 | // 12.04.03 V.Ivanchenko Cut per region for fluo AlongStep |
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| 101 | // 31.08.04 V.Ivanchenko Add density correction |
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| 102 | // |
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| 103 | // -------------------------------------------------------------- |
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| 104 | |
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| 105 | #include "G4LowEnergyIonisation.hh" |
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| 106 | #include "G4eIonisationSpectrum.hh" |
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| 107 | #include "G4eIonisationCrossSectionHandler.hh" |
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| 108 | #include "G4AtomicTransitionManager.hh" |
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| 109 | #include "G4AtomicShell.hh" |
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| 110 | #include "G4VDataSetAlgorithm.hh" |
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| 111 | #include "G4SemiLogInterpolation.hh" |
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| 112 | #include "G4LogLogInterpolation.hh" |
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| 113 | #include "G4EMDataSet.hh" |
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| 114 | #include "G4VEMDataSet.hh" |
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| 115 | #include "G4CompositeEMDataSet.hh" |
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| 116 | #include "G4EnergyLossTables.hh" |
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| 117 | #include "G4ShellVacancy.hh" |
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| 118 | #include "G4UnitsTable.hh" |
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| 119 | #include "G4Electron.hh" |
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| 120 | #include "G4Gamma.hh" |
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| 121 | #include "G4ProductionCutsTable.hh" |
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| 122 | |
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| 123 | G4LowEnergyIonisation::G4LowEnergyIonisation(const G4String& nam) |
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| 124 | : G4eLowEnergyLoss(nam), |
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| 125 | crossSectionHandler(0), |
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| 126 | theMeanFreePath(0), |
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| 127 | energySpectrum(0), |
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| 128 | shellVacancy(0) |
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| 129 | { |
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| 130 | cutForPhotons = 250.0*eV; |
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| 131 | cutForElectrons = 250.0*eV; |
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| 132 | verboseLevel = 0; |
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[1055] | 133 | |
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| 134 | G4cout << G4endl; |
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| 135 | G4cout << "*******************************************************************************" << G4endl; |
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| 136 | G4cout << "*******************************************************************************" << G4endl; |
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| 137 | G4cout << " The class G4LowEnergyIonisation is NOT SUPPORTED ANYMORE. " << G4endl; |
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| 138 | G4cout << " It will be REMOVED with the next major release of Geant4. " << G4endl; |
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| 139 | G4cout << " Please consult: https://twiki.cern.ch/twiki/bin/view/Geant4/LoweProcesses" << G4endl; |
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| 140 | G4cout << "*******************************************************************************" << G4endl; |
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| 141 | G4cout << "*******************************************************************************" << G4endl; |
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| 142 | G4cout << G4endl; |
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[819] | 143 | } |
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| 144 | |
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| 145 | |
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| 146 | G4LowEnergyIonisation::~G4LowEnergyIonisation() |
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| 147 | { |
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| 148 | delete crossSectionHandler; |
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| 149 | delete energySpectrum; |
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| 150 | delete theMeanFreePath; |
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| 151 | delete shellVacancy; |
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| 152 | } |
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| 153 | |
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| 154 | |
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| 155 | void G4LowEnergyIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType) |
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| 156 | { |
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| 157 | if(verboseLevel > 0) { |
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| 158 | G4cout << "G4LowEnergyIonisation::BuildPhysicsTable start" |
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| 159 | << G4endl; |
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| 160 | } |
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| 161 | |
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| 162 | cutForDelta.clear(); |
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| 163 | |
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| 164 | // Create and fill IonisationParameters once |
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| 165 | if( energySpectrum != 0 ) delete energySpectrum; |
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| 166 | energySpectrum = new G4eIonisationSpectrum(); |
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| 167 | |
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| 168 | if(verboseLevel > 0) { |
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| 169 | G4cout << "G4VEnergySpectrum is initialized" |
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| 170 | << G4endl; |
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| 171 | } |
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| 172 | |
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| 173 | // Create and fill G4CrossSectionHandler once |
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| 174 | |
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| 175 | if ( crossSectionHandler != 0 ) delete crossSectionHandler; |
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| 176 | G4VDataSetAlgorithm* interpolation = new G4SemiLogInterpolation(); |
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| 177 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
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| 178 | G4double highKineticEnergy = GetUpperBoundEloss(); |
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| 179 | G4int totBin = GetNbinEloss(); |
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| 180 | crossSectionHandler = new G4eIonisationCrossSectionHandler(energySpectrum, |
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| 181 | interpolation, |
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| 182 | lowKineticEnergy, |
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| 183 | highKineticEnergy, |
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| 184 | totBin); |
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| 185 | crossSectionHandler->LoadShellData("ioni/ion-ss-cs-"); |
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| 186 | |
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| 187 | if (verboseLevel > 0) { |
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| 188 | G4cout << GetProcessName() |
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| 189 | << " is created; Cross section data: " |
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| 190 | << G4endl; |
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| 191 | crossSectionHandler->PrintData(); |
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| 192 | G4cout << "Parameters: " |
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| 193 | << G4endl; |
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| 194 | energySpectrum->PrintData(); |
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| 195 | } |
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| 196 | |
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| 197 | // Build loss table for IonisationIV |
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| 198 | |
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| 199 | BuildLossTable(aParticleType); |
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| 200 | |
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| 201 | if(verboseLevel > 0) { |
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| 202 | G4cout << "The loss table is built" |
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| 203 | << G4endl; |
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| 204 | } |
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| 205 | |
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| 206 | if (&aParticleType==G4Electron::Electron()) { |
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| 207 | |
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| 208 | RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable; |
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| 209 | CounterOfElectronProcess++; |
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| 210 | PrintInfoDefinition(); |
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| 211 | |
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| 212 | } else { |
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| 213 | |
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| 214 | RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable; |
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| 215 | CounterOfPositronProcess++; |
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| 216 | } |
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| 217 | |
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| 218 | // Build mean free path data using cut values |
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| 219 | |
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| 220 | if( theMeanFreePath ) delete theMeanFreePath; |
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| 221 | theMeanFreePath = crossSectionHandler-> |
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| 222 | BuildMeanFreePathForMaterials(&cutForDelta); |
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| 223 | |
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| 224 | if(verboseLevel > 0) { |
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| 225 | G4cout << "The MeanFreePath table is built" |
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| 226 | << G4endl; |
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| 227 | if(verboseLevel > 1) theMeanFreePath->PrintData(); |
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| 228 | } |
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| 229 | |
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| 230 | // Build common DEDX table for all ionisation processes |
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| 231 | |
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| 232 | BuildDEDXTable(aParticleType); |
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| 233 | |
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| 234 | if (verboseLevel > 0) { |
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| 235 | G4cout << "G4LowEnergyIonisation::BuildPhysicsTable end" |
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| 236 | << G4endl; |
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| 237 | } |
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| 238 | } |
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| 239 | |
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| 240 | |
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| 241 | void G4LowEnergyIonisation::BuildLossTable(const G4ParticleDefinition& ) |
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| 242 | { |
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| 243 | // Build table for energy loss due to soft brems |
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| 244 | // the tables are built for *MATERIALS* binning is taken from LowEnergyLoss |
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| 245 | |
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| 246 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
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| 247 | G4double highKineticEnergy = GetUpperBoundEloss(); |
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| 248 | size_t totBin = GetNbinEloss(); |
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| 249 | |
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| 250 | // create table |
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| 251 | |
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| 252 | if (theLossTable) { |
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| 253 | theLossTable->clearAndDestroy(); |
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| 254 | delete theLossTable; |
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| 255 | } |
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| 256 | const G4ProductionCutsTable* theCoupleTable= |
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| 257 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 258 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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| 259 | theLossTable = new G4PhysicsTable(numOfCouples); |
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| 260 | |
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| 261 | if (shellVacancy != 0) delete shellVacancy; |
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| 262 | shellVacancy = new G4ShellVacancy(); |
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| 263 | G4DataVector* ksi = 0; |
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| 264 | G4DataVector* energy = 0; |
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| 265 | size_t binForFluo = totBin/10; |
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| 266 | |
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| 267 | G4PhysicsLogVector* bVector = new G4PhysicsLogVector(lowKineticEnergy, |
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| 268 | highKineticEnergy, |
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| 269 | binForFluo); |
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| 270 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
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| 271 | |
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| 272 | // Clean up the vector of cuts |
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| 273 | |
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| 274 | cutForDelta.clear(); |
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| 275 | |
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| 276 | // Loop for materials |
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| 277 | |
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| 278 | for (size_t m=0; m<numOfCouples; m++) { |
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| 279 | |
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| 280 | // create physics vector and fill it |
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| 281 | G4PhysicsLogVector* aVector = new G4PhysicsLogVector(lowKineticEnergy, |
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| 282 | highKineticEnergy, |
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| 283 | totBin); |
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| 284 | |
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| 285 | // get material parameters needed for the energy loss calculation |
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| 286 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(m); |
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| 287 | const G4Material* material= couple->GetMaterial(); |
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| 288 | |
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| 289 | // the cut cannot be below lowest limit |
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| 290 | G4double tCut = (*(theCoupleTable->GetEnergyCutsVector(1)))[m]; |
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| 291 | if(tCut > highKineticEnergy) tCut = highKineticEnergy; |
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| 292 | cutForDelta.push_back(tCut); |
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| 293 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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| 294 | size_t NumberOfElements = material->GetNumberOfElements() ; |
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| 295 | const G4double* theAtomicNumDensityVector = |
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| 296 | material->GetAtomicNumDensityVector(); |
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| 297 | if(verboseLevel > 0) { |
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| 298 | G4cout << "Energy loss for material # " << m |
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| 299 | << " tCut(keV)= " << tCut/keV |
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| 300 | << G4endl; |
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| 301 | } |
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| 302 | |
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| 303 | // now comes the loop for the kinetic energy values |
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| 304 | for (size_t i = 0; i<totBin; i++) { |
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| 305 | |
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| 306 | G4double lowEdgeEnergy = aVector->GetLowEdgeEnergy(i); |
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| 307 | G4double ionloss = 0.; |
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| 308 | |
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| 309 | // loop for elements in the material |
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| 310 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
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| 311 | |
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| 312 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
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| 313 | |
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| 314 | G4int nShells = transitionManager->NumberOfShells(Z); |
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| 315 | |
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| 316 | for (G4int n=0; n<nShells; n++) { |
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| 317 | |
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| 318 | G4double e = energySpectrum->AverageEnergy(Z, 0.0, tCut, |
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| 319 | lowEdgeEnergy, n); |
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| 320 | G4double cs= crossSectionHandler->FindValue(Z, lowEdgeEnergy, n); |
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| 321 | ionloss += e * cs * theAtomicNumDensityVector[iel]; |
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| 322 | |
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| 323 | if(verboseLevel > 1 || (Z == 14 && lowEdgeEnergy>1. && lowEdgeEnergy<0.)) { |
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| 324 | G4cout << "Z= " << Z |
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| 325 | << " shell= " << n |
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| 326 | << " E(keV)= " << lowEdgeEnergy/keV |
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| 327 | << " Eav(keV)= " << e/keV |
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| 328 | << " cs= " << cs |
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| 329 | << " loss= " << ionloss |
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| 330 | << " rho= " << theAtomicNumDensityVector[iel] |
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| 331 | << G4endl; |
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| 332 | } |
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| 333 | } |
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| 334 | G4double esp = energySpectrum->Excitation(Z, lowEdgeEnergy); |
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| 335 | ionloss += esp * theAtomicNumDensityVector[iel]; |
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| 336 | |
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| 337 | } |
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| 338 | if(verboseLevel > 1 || (m == 0 && lowEdgeEnergy>=1. && lowEdgeEnergy<=0.)) { |
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| 339 | G4cout << "Sum: " |
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| 340 | << " E(keV)= " << lowEdgeEnergy/keV |
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| 341 | << " loss(MeV/mm)= " << ionloss*mm/MeV |
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| 342 | << G4endl; |
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| 343 | } |
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| 344 | aVector->PutValue(i,ionloss); |
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| 345 | } |
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| 346 | theLossTable->insert(aVector); |
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| 347 | |
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| 348 | // fill data for fluorescence |
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| 349 | |
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| 350 | G4VDataSetAlgorithm* interp = new G4LogLogInterpolation(); |
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| 351 | G4VEMDataSet* xsis = new G4CompositeEMDataSet(interp, 1., 1.); |
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| 352 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
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| 353 | |
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| 354 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
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| 355 | energy = new G4DataVector(); |
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| 356 | ksi = new G4DataVector(); |
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| 357 | |
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| 358 | for (size_t j = 0; j<binForFluo; j++) { |
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| 359 | |
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| 360 | G4double lowEdgeEnergy = bVector->GetLowEdgeEnergy(j); |
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| 361 | G4double cross = 0.; |
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| 362 | G4double eAverage= 0.; |
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| 363 | G4int nShells = transitionManager->NumberOfShells(Z); |
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| 364 | |
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| 365 | for (G4int n=0; n<nShells; n++) { |
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| 366 | |
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| 367 | G4double e = energySpectrum->AverageEnergy(Z, 0.0, tCut, |
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| 368 | lowEdgeEnergy, n); |
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| 369 | G4double pro = energySpectrum->Probability(Z, 0.0, tCut, |
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| 370 | lowEdgeEnergy, n); |
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| 371 | G4double cs= crossSectionHandler->FindValue(Z, lowEdgeEnergy, n); |
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| 372 | eAverage += e * cs * theAtomicNumDensityVector[iel]; |
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| 373 | cross += cs * pro * theAtomicNumDensityVector[iel]; |
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| 374 | if(verboseLevel > 1) { |
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| 375 | G4cout << "Z= " << Z |
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| 376 | << " shell= " << n |
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| 377 | << " E(keV)= " << lowEdgeEnergy/keV |
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| 378 | << " Eav(keV)= " << e/keV |
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| 379 | << " pro= " << pro |
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| 380 | << " cs= " << cs |
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| 381 | << G4endl; |
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| 382 | } |
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| 383 | } |
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| 384 | |
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| 385 | G4double coeff = 0.0; |
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| 386 | if(eAverage > 0.) { |
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| 387 | coeff = cross/eAverage; |
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| 388 | eAverage /= cross; |
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| 389 | } |
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| 390 | |
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| 391 | if(verboseLevel > 1) { |
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| 392 | G4cout << "Ksi Coefficient for Z= " << Z |
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| 393 | << " E(keV)= " << lowEdgeEnergy/keV |
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| 394 | << " Eav(keV)= " << eAverage/keV |
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| 395 | << " coeff= " << coeff |
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| 396 | << G4endl; |
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| 397 | } |
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| 398 | |
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| 399 | energy->push_back(lowEdgeEnergy); |
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| 400 | ksi->push_back(coeff); |
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| 401 | } |
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| 402 | interp = new G4LogLogInterpolation(); |
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| 403 | G4VEMDataSet* set = new G4EMDataSet(Z,energy,ksi,interp,1.,1.); |
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| 404 | xsis->AddComponent(set); |
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| 405 | } |
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| 406 | if(verboseLevel) xsis->PrintData(); |
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| 407 | shellVacancy->AddXsiTable(xsis); |
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| 408 | } |
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| 409 | delete bVector; |
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| 410 | } |
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| 411 | |
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| 412 | |
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| 413 | G4VParticleChange* G4LowEnergyIonisation::PostStepDoIt(const G4Track& track, |
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| 414 | const G4Step& step) |
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| 415 | { |
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| 416 | // Delta electron production mechanism on base of the model |
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| 417 | // J. Stepanek " A program to determine the radiation spectra due |
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| 418 | // to a single atomic subshell ionisation by a particle or due to |
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| 419 | // deexcitation or decay of radionuclides", |
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| 420 | // Comp. Phys. Comm. 1206 pp 1-19 (1997) |
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| 421 | |
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| 422 | aParticleChange.Initialize(track); |
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| 423 | |
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| 424 | const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple(); |
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| 425 | G4double kineticEnergy = track.GetKineticEnergy(); |
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| 426 | |
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| 427 | // Select atom and shell |
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| 428 | |
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| 429 | G4int Z = crossSectionHandler->SelectRandomAtom(couple, kineticEnergy); |
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| 430 | G4int shell = crossSectionHandler->SelectRandomShell(Z, kineticEnergy); |
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| 431 | const G4AtomicShell* atomicShell = |
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| 432 | (G4AtomicTransitionManager::Instance())->Shell(Z, shell); |
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| 433 | G4double bindingEnergy = atomicShell->BindingEnergy(); |
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| 434 | G4int shellId = atomicShell->ShellId(); |
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| 435 | |
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| 436 | // Sample delta energy |
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| 437 | |
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| 438 | G4int index = couple->GetIndex(); |
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| 439 | G4double tCut = cutForDelta[index]; |
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| 440 | G4double tmax = energySpectrum->MaxEnergyOfSecondaries(kineticEnergy); |
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| 441 | G4double tDelta = energySpectrum->SampleEnergy(Z, tCut, tmax, |
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| 442 | kineticEnergy, shell); |
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| 443 | |
---|
| 444 | if(tDelta == 0.0) |
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| 445 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
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| 446 | |
---|
| 447 | // Transform to shell potential |
---|
| 448 | G4double deltaKinE = tDelta + 2.0*bindingEnergy; |
---|
| 449 | G4double primaryKinE = kineticEnergy + 2.0*bindingEnergy; |
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| 450 | |
---|
| 451 | // sampling of scattering angle neglecting atomic motion |
---|
| 452 | G4double deltaMom = std::sqrt(deltaKinE*(deltaKinE + 2.0*electron_mass_c2)); |
---|
| 453 | G4double primaryMom = std::sqrt(primaryKinE*(primaryKinE + 2.0*electron_mass_c2)); |
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| 454 | |
---|
| 455 | G4double cost = deltaKinE * (primaryKinE + 2.0*electron_mass_c2) |
---|
| 456 | / (deltaMom * primaryMom); |
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| 457 | |
---|
| 458 | if (cost > 1.) cost = 1.; |
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| 459 | G4double sint = std::sqrt(1. - cost*cost); |
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| 460 | G4double phi = twopi * G4UniformRand(); |
---|
| 461 | G4double dirx = sint * std::cos(phi); |
---|
| 462 | G4double diry = sint * std::sin(phi); |
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| 463 | G4double dirz = cost; |
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| 464 | |
---|
| 465 | // Rotate to incident electron direction |
---|
| 466 | G4ThreeVector primaryDirection = track.GetMomentumDirection(); |
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| 467 | G4ThreeVector deltaDir(dirx,diry,dirz); |
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| 468 | deltaDir.rotateUz(primaryDirection); |
---|
| 469 | dirx = deltaDir.x(); |
---|
| 470 | diry = deltaDir.y(); |
---|
| 471 | dirz = deltaDir.z(); |
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| 472 | |
---|
| 473 | |
---|
| 474 | // Take into account atomic motion del is relative momentum of the motion |
---|
| 475 | // kinetic energy of the motion == bindingEnergy in V.Ivanchenko model |
---|
| 476 | |
---|
| 477 | cost = 2.0*G4UniformRand() - 1.0; |
---|
| 478 | sint = std::sqrt(1. - cost*cost); |
---|
| 479 | phi = twopi * G4UniformRand(); |
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| 480 | G4double del = std::sqrt(bindingEnergy *(bindingEnergy + 2.0*electron_mass_c2)) |
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| 481 | / deltaMom; |
---|
| 482 | dirx += del* sint * std::cos(phi); |
---|
| 483 | diry += del* sint * std::sin(phi); |
---|
| 484 | dirz += del* cost; |
---|
| 485 | |
---|
| 486 | // Find out new primary electron direction |
---|
| 487 | G4double finalPx = primaryMom*primaryDirection.x() - deltaMom*dirx; |
---|
| 488 | G4double finalPy = primaryMom*primaryDirection.y() - deltaMom*diry; |
---|
| 489 | G4double finalPz = primaryMom*primaryDirection.z() - deltaMom*dirz; |
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| 490 | |
---|
| 491 | // create G4DynamicParticle object for delta ray |
---|
| 492 | G4DynamicParticle* theDeltaRay = new G4DynamicParticle(); |
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| 493 | theDeltaRay->SetKineticEnergy(tDelta); |
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| 494 | G4double norm = 1.0/std::sqrt(dirx*dirx + diry*diry + dirz*dirz); |
---|
| 495 | dirx *= norm; |
---|
| 496 | diry *= norm; |
---|
| 497 | dirz *= norm; |
---|
| 498 | theDeltaRay->SetMomentumDirection(dirx, diry, dirz); |
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| 499 | theDeltaRay->SetDefinition(G4Electron::Electron()); |
---|
| 500 | |
---|
| 501 | G4double theEnergyDeposit = bindingEnergy; |
---|
| 502 | |
---|
| 503 | // fill ParticleChange |
---|
| 504 | // changed energy and momentum of the actual particle |
---|
| 505 | |
---|
| 506 | G4double finalKinEnergy = kineticEnergy - tDelta - theEnergyDeposit; |
---|
| 507 | if(finalKinEnergy < 0.0) { |
---|
| 508 | theEnergyDeposit += finalKinEnergy; |
---|
| 509 | finalKinEnergy = 0.0; |
---|
| 510 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 511 | |
---|
| 512 | } else { |
---|
| 513 | |
---|
| 514 | G4double norm = 1.0/std::sqrt(finalPx*finalPx+finalPy*finalPy+finalPz*finalPz); |
---|
| 515 | finalPx *= norm; |
---|
| 516 | finalPy *= norm; |
---|
| 517 | finalPz *= norm; |
---|
| 518 | aParticleChange.ProposeMomentumDirection(finalPx, finalPy, finalPz); |
---|
| 519 | } |
---|
| 520 | |
---|
| 521 | aParticleChange.ProposeEnergy(finalKinEnergy); |
---|
| 522 | |
---|
| 523 | // Generation of Fluorescence and Auger |
---|
| 524 | size_t nSecondaries = 0; |
---|
| 525 | size_t totalNumber = 1; |
---|
| 526 | std::vector<G4DynamicParticle*>* secondaryVector = 0; |
---|
| 527 | G4DynamicParticle* aSecondary = 0; |
---|
| 528 | G4ParticleDefinition* type = 0; |
---|
| 529 | |
---|
| 530 | // Fluorescence data start from element 6 |
---|
| 531 | |
---|
| 532 | if (Fluorescence() && Z > 5 && (bindingEnergy >= cutForPhotons |
---|
| 533 | || bindingEnergy >= cutForElectrons)) { |
---|
| 534 | |
---|
| 535 | secondaryVector = deexcitationManager.GenerateParticles(Z, shellId); |
---|
| 536 | |
---|
| 537 | if (secondaryVector != 0) { |
---|
| 538 | |
---|
| 539 | nSecondaries = secondaryVector->size(); |
---|
| 540 | for (size_t i = 0; i<nSecondaries; i++) { |
---|
| 541 | |
---|
| 542 | aSecondary = (*secondaryVector)[i]; |
---|
| 543 | if (aSecondary) { |
---|
| 544 | |
---|
| 545 | G4double e = aSecondary->GetKineticEnergy(); |
---|
| 546 | type = aSecondary->GetDefinition(); |
---|
| 547 | if (e < theEnergyDeposit && |
---|
| 548 | ((type == G4Gamma::Gamma() && e > cutForPhotons ) || |
---|
| 549 | (type == G4Electron::Electron() && e > cutForElectrons ))) { |
---|
| 550 | |
---|
| 551 | theEnergyDeposit -= e; |
---|
| 552 | totalNumber++; |
---|
| 553 | |
---|
| 554 | } else { |
---|
| 555 | |
---|
| 556 | delete aSecondary; |
---|
| 557 | (*secondaryVector)[i] = 0; |
---|
| 558 | } |
---|
| 559 | } |
---|
| 560 | } |
---|
| 561 | } |
---|
| 562 | } |
---|
| 563 | |
---|
| 564 | // Save delta-electrons |
---|
| 565 | |
---|
| 566 | aParticleChange.SetNumberOfSecondaries(totalNumber); |
---|
| 567 | aParticleChange.AddSecondary(theDeltaRay); |
---|
| 568 | |
---|
| 569 | // Save Fluorescence and Auger |
---|
| 570 | |
---|
| 571 | if (secondaryVector) { |
---|
| 572 | |
---|
| 573 | for (size_t l = 0; l < nSecondaries; l++) { |
---|
| 574 | |
---|
| 575 | aSecondary = (*secondaryVector)[l]; |
---|
| 576 | |
---|
| 577 | if(aSecondary) { |
---|
| 578 | |
---|
| 579 | aParticleChange.AddSecondary(aSecondary); |
---|
| 580 | } |
---|
| 581 | } |
---|
| 582 | delete secondaryVector; |
---|
| 583 | } |
---|
| 584 | |
---|
| 585 | if(theEnergyDeposit < 0.) { |
---|
| 586 | G4cout << "G4LowEnergyIonisation: Negative energy deposit: " |
---|
| 587 | << theEnergyDeposit/eV << " eV" << G4endl; |
---|
| 588 | theEnergyDeposit = 0.0; |
---|
| 589 | } |
---|
| 590 | aParticleChange.ProposeLocalEnergyDeposit(theEnergyDeposit); |
---|
| 591 | |
---|
| 592 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
---|
| 593 | } |
---|
| 594 | |
---|
| 595 | |
---|
| 596 | void G4LowEnergyIonisation::PrintInfoDefinition() |
---|
| 597 | { |
---|
| 598 | G4String comments = "Total cross sections from EEDL database."; |
---|
| 599 | comments += "\n Gamma energy sampled from a parametrised formula."; |
---|
| 600 | comments += "\n Implementation of the continuous dE/dx part."; |
---|
| 601 | comments += "\n At present it can be used for electrons "; |
---|
| 602 | comments += "in the energy range [250eV,100GeV]."; |
---|
| 603 | comments += "\n The process must work with G4LowEnergyBremsstrahlung."; |
---|
| 604 | |
---|
| 605 | G4cout << G4endl << GetProcessName() << ": " << comments << G4endl; |
---|
| 606 | } |
---|
| 607 | |
---|
| 608 | G4bool G4LowEnergyIonisation::IsApplicable(const G4ParticleDefinition& particle) |
---|
| 609 | { |
---|
| 610 | return ( (&particle == G4Electron::Electron()) ); |
---|
| 611 | } |
---|
| 612 | |
---|
| 613 | std::vector<G4DynamicParticle*>* |
---|
| 614 | G4LowEnergyIonisation::DeexciteAtom(const G4MaterialCutsCouple* couple, |
---|
| 615 | G4double incidentEnergy, |
---|
| 616 | G4double eLoss) |
---|
| 617 | { |
---|
| 618 | // create vector of secondary particles |
---|
| 619 | const G4Material* material = couple->GetMaterial(); |
---|
| 620 | |
---|
| 621 | std::vector<G4DynamicParticle*>* partVector = |
---|
| 622 | new std::vector<G4DynamicParticle*>; |
---|
| 623 | |
---|
| 624 | if(eLoss > cutForPhotons && eLoss > cutForElectrons) { |
---|
| 625 | |
---|
| 626 | const G4AtomicTransitionManager* transitionManager = |
---|
| 627 | G4AtomicTransitionManager::Instance(); |
---|
| 628 | |
---|
| 629 | size_t nElements = material->GetNumberOfElements(); |
---|
| 630 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
| 631 | |
---|
| 632 | std::vector<G4DynamicParticle*>* secVector = 0; |
---|
| 633 | G4DynamicParticle* aSecondary = 0; |
---|
| 634 | G4ParticleDefinition* type = 0; |
---|
| 635 | G4double e; |
---|
| 636 | G4ThreeVector position; |
---|
| 637 | G4int shell, shellId; |
---|
| 638 | |
---|
| 639 | // sample secondaries |
---|
| 640 | |
---|
| 641 | G4double eTot = 0.0; |
---|
| 642 | std::vector<G4int> n = |
---|
| 643 | shellVacancy->GenerateNumberOfIonisations(couple, |
---|
| 644 | incidentEnergy,eLoss); |
---|
| 645 | for (size_t i=0; i<nElements; i++) { |
---|
| 646 | |
---|
| 647 | G4int Z = (G4int)((*theElementVector)[i]->GetZ()); |
---|
| 648 | size_t nVacancies = n[i]; |
---|
| 649 | |
---|
| 650 | G4double maxE = transitionManager->Shell(Z, 0)->BindingEnergy(); |
---|
| 651 | |
---|
| 652 | if (nVacancies && Z > 5 && (maxE>cutForPhotons || maxE>cutForElectrons)) { |
---|
| 653 | |
---|
| 654 | for (size_t j=0; j<nVacancies; j++) { |
---|
| 655 | |
---|
| 656 | shell = crossSectionHandler->SelectRandomShell(Z, incidentEnergy); |
---|
| 657 | shellId = transitionManager->Shell(Z, shell)->ShellId(); |
---|
| 658 | G4double maxEShell = |
---|
| 659 | transitionManager->Shell(Z, shell)->BindingEnergy(); |
---|
| 660 | |
---|
| 661 | if (maxEShell>cutForPhotons || maxEShell>cutForElectrons ) { |
---|
| 662 | |
---|
| 663 | secVector = deexcitationManager.GenerateParticles(Z, shellId); |
---|
| 664 | |
---|
| 665 | if (secVector != 0) { |
---|
| 666 | |
---|
| 667 | for (size_t l = 0; l<secVector->size(); l++) { |
---|
| 668 | |
---|
| 669 | aSecondary = (*secVector)[l]; |
---|
| 670 | if (aSecondary != 0) { |
---|
| 671 | |
---|
| 672 | e = aSecondary->GetKineticEnergy(); |
---|
| 673 | type = aSecondary->GetDefinition(); |
---|
| 674 | if ( eTot + e <= eLoss && |
---|
[961] | 675 | ((type == G4Gamma::Gamma() && e>cutForPhotons ) || |
---|
| 676 | (type == G4Electron::Electron() && e>cutForElectrons))) { |
---|
[819] | 677 | |
---|
| 678 | eTot += e; |
---|
| 679 | partVector->push_back(aSecondary); |
---|
| 680 | |
---|
| 681 | } else { |
---|
| 682 | |
---|
| 683 | delete aSecondary; |
---|
| 684 | |
---|
| 685 | } |
---|
| 686 | } |
---|
| 687 | } |
---|
| 688 | delete secVector; |
---|
| 689 | } |
---|
| 690 | } |
---|
| 691 | } |
---|
| 692 | } |
---|
| 693 | } |
---|
| 694 | } |
---|
| 695 | return partVector; |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | G4double G4LowEnergyIonisation::GetMeanFreePath(const G4Track& track, |
---|
| 699 | G4double , // previousStepSize |
---|
| 700 | G4ForceCondition* cond) |
---|
| 701 | { |
---|
| 702 | *cond = NotForced; |
---|
| 703 | G4int index = (track.GetMaterialCutsCouple())->GetIndex(); |
---|
| 704 | const G4VEMDataSet* data = theMeanFreePath->GetComponent(index); |
---|
| 705 | G4double meanFreePath = data->FindValue(track.GetKineticEnergy()); |
---|
| 706 | return meanFreePath; |
---|
| 707 | } |
---|
| 708 | |
---|
| 709 | void G4LowEnergyIonisation::SetCutForLowEnSecPhotons(G4double cut) |
---|
| 710 | { |
---|
| 711 | cutForPhotons = cut; |
---|
| 712 | deexcitationManager.SetCutForSecondaryPhotons(cut); |
---|
| 713 | } |
---|
| 714 | |
---|
| 715 | void G4LowEnergyIonisation::SetCutForLowEnSecElectrons(G4double cut) |
---|
| 716 | { |
---|
| 717 | cutForElectrons = cut; |
---|
| 718 | deexcitationManager.SetCutForAugerElectrons(cut); |
---|
| 719 | } |
---|
| 720 | |
---|
| 721 | void G4LowEnergyIonisation::ActivateAuger(G4bool val) |
---|
| 722 | { |
---|
| 723 | deexcitationManager.ActivateAugerElectronProduction(val); |
---|
| 724 | } |
---|
| 725 | |
---|