| 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 | // $Id: G4PenelopeIonisationModel.cc,v 1.18 2010/12/01 15:20:35 pandola Exp $
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| 27 | // GEANT4 tag $Name: geant4-09-04-ref-00 $
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| 28 | //
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| 29 | // Author: Luciano Pandola
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| 30 | //
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| 31 | // History:
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| 32 | // --------
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| 33 | // 26 Nov 2008 L Pandola Migration from process to model
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| 34 | // 17 Apr 2009 V Ivanchenko Cleanup initialisation and generation of secondaries:
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| 35 | // - apply internal high-energy limit only in constructor
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| 36 | // - do not apply low-energy limit (default is 0)
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| 37 | // - added MinEnergyCut method
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| 38 | // - do not change track status
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| 39 | // 19 May 2009 L Pandola Explicitely set to zero pointers deleted in
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| 40 | // Initialise(), since they might be checked later on
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| 41 | // 21 Oct 2009 L Pandola Remove un-necessary fUseAtomicDeexcitation flag - now managed by
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| 42 | // G4VEmModel::DeexcitationFlag()
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| 43 | // Add ActivateAuger() method
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| 44 | // 15 Mar 2010 L Pandola Explicitely initialize Auger to false
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| 45 | // 29 Mar 2010 L Pandola Added a dummy ComputeCrossSectionPerAtom() method issueing a
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| 46 | // warning if users try to access atomic cross sections via
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| 47 | // G4EmCalculator
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| 48 | // 15 Apr 2010 L. Pandola Implemented model's own version of MinEnergyCut()
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| 49 | // 23 Apr 2010 L. Pandola Removed InitialiseElementSelectors() call. Useless here and
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| 50 | // triggers fake warning messages
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| 51 | //
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| 52 |
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| 53 | #include "G4PenelopeIonisationModel.hh"
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| 54 | #include "G4ParticleDefinition.hh"
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| 55 | #include "G4MaterialCutsCouple.hh"
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| 56 | #include "G4ProductionCutsTable.hh"
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| 57 | #include "G4DynamicParticle.hh"
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| 58 | #include "G4Element.hh"
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| 59 | #include "G4AtomicTransitionManager.hh"
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| 60 | #include "G4AtomicDeexcitation.hh"
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| 61 | #include "G4AtomicShell.hh"
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| 62 | #include "G4Gamma.hh"
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| 63 | #include "G4Electron.hh"
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| 64 | #include "G4Positron.hh"
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| 65 | #include "G4CrossSectionHandler.hh"
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| 66 | #include "G4AtomicDeexcitation.hh"
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| 67 | #include "G4VEMDataSet.hh"
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| 68 |
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| 69 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 70 |
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| 71 |
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| 72 | G4PenelopeIonisationModel::G4PenelopeIonisationModel(const G4ParticleDefinition*,
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| 73 | const G4String& nam)
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| 74 | :G4VEmModel(nam),isInitialised(false),
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| 75 | kineticEnergy1(0.*eV),
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| 76 | cosThetaPrimary(1.0),
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| 77 | energySecondary(0.*eV),
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| 78 | cosThetaSecondary(0.0),
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| 79 | iOsc(-1),
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| 80 | crossSectionHandler(0),ionizationEnergy(0),
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| 81 | resonanceEnergy(0),occupationNumber(0),shellFlag(0),
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| 82 | theXSTable(0)
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| 83 | {
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| 84 | fIntrinsicLowEnergyLimit = 100.0*eV;
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| 85 | fIntrinsicHighEnergyLimit = 100.0*GeV;
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| 86 | // SetLowEnergyLimit(fIntrinsicLowEnergyLimit);
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| 87 | SetHighEnergyLimit(fIntrinsicHighEnergyLimit);
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| 88 | //
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| 89 | //
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| 90 | verboseLevel= 0;
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| 91 |
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| 92 | // Verbosity scale:
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| 93 | // 0 = nothing
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| 94 | // 1 = warning for energy non-conservation
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| 95 | // 2 = details of energy budget
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| 96 | // 3 = calculation of cross sections, file openings, sampling of atoms
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| 97 | // 4 = entering in methods
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| 98 |
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| 99 | // Atomic deexcitation model activated by default
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| 100 | SetDeexcitationFlag(true);
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| 101 | ActivateAuger(false);
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| 102 |
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| 103 | //These vectors do not change when materials or cut change.
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| 104 | //Therefore I can read it at the constructor
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| 105 | ionizationEnergy = new std::map<G4int,G4DataVector*>;
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| 106 | resonanceEnergy = new std::map<G4int,G4DataVector*>;
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| 107 | occupationNumber = new std::map<G4int,G4DataVector*>;
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| 108 | shellFlag = new std::map<G4int,G4DataVector*>;
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| 109 |
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| 110 | ReadData(); //Read data from file
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| 111 |
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| 112 | }
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| 113 |
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| 114 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 115 |
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| 116 | G4PenelopeIonisationModel::~G4PenelopeIonisationModel()
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| 117 | {
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| 118 |
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| 119 | if (crossSectionHandler) delete crossSectionHandler;
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| 120 |
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| 121 | if (theXSTable)
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| 122 | {
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| 123 | for (size_t i=0; i<theXSTable->size(); i++)
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| 124 | delete (*theXSTable)[i];
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| 125 | delete theXSTable;
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| 126 | }
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| 127 |
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| 128 |
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| 129 | std::map <G4int,G4DataVector*>::iterator i;
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| 130 | if (ionizationEnergy)
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| 131 | {
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| 132 | for (i=ionizationEnergy->begin();i != ionizationEnergy->end();i++)
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| 133 | if (i->second) delete i->second;
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| 134 | delete ionizationEnergy;
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| 135 | }
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| 136 | if (resonanceEnergy)
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| 137 | {
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| 138 | for (i=resonanceEnergy->begin();i != resonanceEnergy->end();i++)
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| 139 | if (i->second) delete i->second;
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| 140 | delete resonanceEnergy;
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| 141 | }
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| 142 | if (occupationNumber)
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| 143 | {
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| 144 | for (i=occupationNumber->begin();i != occupationNumber->end();i++)
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| 145 | if (i->second) delete i->second;
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| 146 | delete occupationNumber;
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| 147 | }
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| 148 | if (shellFlag)
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| 149 | {
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| 150 | for (i=shellFlag->begin();i != shellFlag->end();i++)
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| 151 | if (i->second) delete i->second;
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| 152 | delete shellFlag;
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| 153 | }
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| 154 | }
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| 155 |
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| 156 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 157 |
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| 158 | void G4PenelopeIonisationModel::Initialise(const G4ParticleDefinition* particle,
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| 159 | const G4DataVector& )
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| 160 | {
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| 161 | if (verboseLevel > 3)
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| 162 | G4cout << "Calling G4PenelopeIonisationModel::Initialise()" << G4endl;
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| 163 |
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| 164 | //Delete and re-initialize the cross section handler
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| 165 | if (crossSectionHandler)
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| 166 | {
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| 167 | crossSectionHandler->Clear();
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| 168 | delete crossSectionHandler;
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| 169 | crossSectionHandler = 0;
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| 170 | }
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| 171 |
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| 172 | if (theXSTable)
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| 173 | {
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| 174 | for (size_t i=0; i<theXSTable->size(); i++)
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| 175 | {
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| 176 | delete (*theXSTable)[i];
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| 177 | (*theXSTable)[i] = 0;
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| 178 | }
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| 179 | delete theXSTable;
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| 180 | theXSTable = 0;
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| 181 | }
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| 182 |
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| 183 | crossSectionHandler = new G4CrossSectionHandler();
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| 184 | crossSectionHandler->Clear();
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| 185 | G4String crossSectionFile = "NULL";
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| 186 |
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| 187 | if (particle == G4Electron::Electron())
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| 188 | crossSectionFile = "penelope/ion-cs-el-";
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| 189 | else if (particle == G4Positron::Positron())
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| 190 | crossSectionFile = "penelope/ion-cs-po-";
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| 191 | crossSectionHandler->LoadData(crossSectionFile);
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| 192 | //This is used to retrieve cross section values later on
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| 193 | G4VEMDataSet* emdata =
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| 194 | crossSectionHandler->BuildMeanFreePathForMaterials();
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| 195 | //The method BuildMeanFreePathForMaterials() is required here only to force
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| 196 | //the building of an internal table: the output pointer can be deleted
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| 197 | delete emdata;
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| 198 |
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| 199 | if (verboseLevel > 2)
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| 200 | G4cout << "Loaded cross section files for PenelopeIonisationModel" << G4endl;
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| 201 |
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| 202 | if (verboseLevel > 2) {
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| 203 | G4cout << "Penelope Ionisation model is initialized " << G4endl
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| 204 | << "Energy range: "
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| 205 | << LowEnergyLimit() / keV << " keV - "
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| 206 | << HighEnergyLimit() / GeV << " GeV"
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| 207 | << G4endl;
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| 208 | }
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| 209 |
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| 210 | if(isInitialised) return;
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| 211 | fParticleChange = GetParticleChangeForLoss();
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| 212 | isInitialised = true;
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| 213 | }
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| 214 |
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| 215 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 216 |
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| 217 | G4double G4PenelopeIonisationModel::CrossSectionPerVolume(const G4Material* material,
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| 218 | const G4ParticleDefinition* theParticle,
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| 219 | G4double energy,
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| 220 | G4double cutEnergy,
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| 221 | G4double)
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| 222 | {
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| 223 | // Penelope model to calculate the cross section for inelastic collisions above the
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| 224 | // threshold. It makes use of the Generalised Oscillator Strength (GOS) model from
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| 225 | // D. Liljequist, J. Phys. D: Appl. Phys. 16 (1983) 1567
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| 226 | //
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| 227 | // The total cross section (hard+soft) is read from a database file (element per
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| 228 | // element), while the ratio hard-to-total is calculated analytically by taking
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| 229 | // into account the atomic oscillators coming into the play for a given threshold.
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| 230 | // This is done by the method CalculateCrossSectionsRatio().
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| 231 | // For incident e- the maximum energy allowed for the delta-rays is energy/2.
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| 232 | // because particles are undistinghishable.
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| 233 | //
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| 234 | // The contribution is splitted in three parts: distant longitudinal collisions,
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| 235 | // distant transverse collisions and close collisions. Each term is described by
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| 236 | // its own analytical function.
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| 237 | // Fermi density correction is calculated analytically according to
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| 238 | // U. Fano, Ann. Rev. Nucl. Sci. 13 (1963),1
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| 239 | //
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| 240 | if (verboseLevel > 3)
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| 241 | G4cout << "Calling CrossSectionPerVolume() of G4PenelopeIonisationModel" << G4endl;
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| 242 |
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| 243 | SetupForMaterial(theParticle, material, energy);
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| 244 |
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| 245 | // VI - should be check at initialisation not in run time
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| 246 | /*
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| 247 | if (!crossSectionHandler)
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| 248 | {
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| 249 | G4cout << "G4PenelopeIonisationModel::CrossSectionPerVolume" << G4endl;
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| 250 | G4cout << "The cross section handler is not correctly initialized" << G4endl;
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| 251 | G4Exception();
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| 252 | }
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| 253 | */
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| 254 | if (!theXSTable)
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| 255 | {
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| 256 | if (verboseLevel > 2)
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| 257 | {
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| 258 | G4cout << "G4PenelopeIonisationModel::CrossSectionPerVolume" << G4endl;
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| 259 | G4cout << "Going to build Cross Section table " << G4endl;
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| 260 | }
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| 261 | theXSTable = new std::vector<G4VEMDataSet*>;
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| 262 | theXSTable = BuildCrossSectionTable(theParticle);
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| 263 | }
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| 264 |
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| 265 | G4double totalCross = 0.0;
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| 266 | G4double cross = 0.0;
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| 267 | const G4ElementVector* theElementVector = material->GetElementVector();
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| 268 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume();
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| 269 | G4double electronVolumeDensity =
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| 270 | material->GetTotNbOfElectPerVolume(); //electron density
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| 271 |
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| 272 | if (verboseLevel > 4)
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| 273 | G4cout << "Electron volume density of " << material->GetName() << ": " <<
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| 274 | electronVolumeDensity*cm3 << " electrons/cm3" << G4endl;
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| 275 |
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| 276 | G4int nelm = material->GetNumberOfElements();
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| 277 | for (G4int i=0; i<nelm; i++)
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| 278 | {
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| 279 | G4int iZ = (G4int) (*theElementVector)[i]->GetZ();
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| 280 | G4double ratio = CalculateCrossSectionsRatio(energy,cutEnergy,iZ,electronVolumeDensity,
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| 281 | theParticle);
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| 282 | cross += theAtomNumDensityVector[i]*
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| 283 | crossSectionHandler->FindValue(iZ,energy)*ratio;
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| 284 | totalCross += theAtomNumDensityVector[i]*
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| 285 | crossSectionHandler->FindValue(iZ,energy);
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| 286 | }
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| 287 |
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| 288 | if (verboseLevel > 2)
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| 289 | {
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| 290 | G4cout << "G4PenelopeIonisationModel " << G4endl;
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| 291 | G4cout << "Mean free path for delta emission > " << cutEnergy/keV << " keV at " <<
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| 292 | energy/keV << " keV = " << (1./cross)/mm << " mm" << G4endl;
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| 293 | G4cout << "Total free path for ionisation (no threshold) at " <<
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| 294 | energy/keV << " keV = " << (1./totalCross)/mm << " mm" << G4endl;
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| 295 | }
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| 296 | return cross;
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| 297 | }
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| 298 |
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| 299 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 300 |
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| 301 | //This is a dummy method. Never inkoved by the tracking, it just issues
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| 302 | //a warning if one tries to get Cross Sections per Atom via the
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| 303 | //G4EmCalculator.
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| 304 | G4double G4PenelopeIonisationModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
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| 305 | G4double,
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| 306 | G4double,
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| 307 | G4double,
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| 308 | G4double,
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| 309 | G4double)
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| 310 | {
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| 311 | G4cout << "*** G4PenelopeIonisationModel -- WARNING ***" << G4endl;
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| 312 | G4cout << "Penelope Ionisation model does not calculate cross section _per atom_ " << G4endl;
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| 313 | G4cout << "so the result is always zero. For physics values, please invoke " << G4endl;
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| 314 | G4cout << "GetCrossSectionPerVolume() or GetMeanFreePath() via the G4EmCalculator" << G4endl;
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| 315 | return 0;
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| 316 | }
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| 317 |
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| 318 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 319 |
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| 320 | G4double G4PenelopeIonisationModel::ComputeDEDXPerVolume(const G4Material* material,
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| 321 | const G4ParticleDefinition* theParticle,
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| 322 | G4double kineticEnergy,
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| 323 | G4double cutEnergy)
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| 324 | {
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| 325 | // Penelope model to calculate the stopping power for soft inelastic collisions
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| 326 | // below the threshold. It makes use of the Generalised Oscillator Strength (GOS)
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| 327 | // model from
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| 328 | // D. Liljequist, J. Phys. D: Appl. Phys. 16 (1983) 1567
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| 329 | //
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| 330 | // The stopping power is calculated analytically using the dsigma/dW cross
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| 331 | // section from the GOS models, which includes separate contributions from
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| 332 | // distant longitudinal collisions, distant transverse collisions and
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| 333 | // close collisions. Only the atomic oscillators that come in the play
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| 334 | // (according to the threshold) are considered for the calculation.
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| 335 | // Differential cross sections have a different form for e+ and e-.
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| 336 | //
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| 337 | // Fermi density correction is calculated analytically according to
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| 338 | // U. Fano, Ann. Rev. Nucl. Sci. 13 (1963),1
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| 339 |
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| 340 | if (verboseLevel > 3)
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| 341 | G4cout << "Calling ComputeDEDX() of G4PenelopeIonisationModel" << G4endl;
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| 342 |
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| 343 | G4double sPower = 0.0;
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| 344 | const G4ElementVector* theElementVector = material->GetElementVector();
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| 345 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume();
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| 346 | G4double electronVolumeDensity =
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| 347 | material->GetTotNbOfElectPerVolume(); //electron density
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| 348 |
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| 349 | //Loop on the elements in the material
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| 350 | G4int nelm = material->GetNumberOfElements();
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| 351 | for (G4int i=0; i<nelm; i++)
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| 352 | {
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| 353 | G4int iZ = (G4int) (*theElementVector)[i]->GetZ();
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| 354 |
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| 355 | //Calculate stopping power contribution from each element
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| 356 | //Constants
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| 357 | G4double gamma = 1.0+kineticEnergy/electron_mass_c2;
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| 358 | G4double gamma2 = gamma*gamma;
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| 359 | G4double beta2 = (gamma2-1.0)/gamma2;
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| 360 | G4double constant = pi*classic_electr_radius*classic_electr_radius
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| 361 | *2.0*electron_mass_c2/beta2;
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| 362 |
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| 363 | G4double delta = CalculateDeltaFermi(kineticEnergy,iZ,electronVolumeDensity);
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| 364 | G4int nbOsc = (G4int) resonanceEnergy->find(iZ)->second->size();
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| 365 | G4double stoppingPowerForElement = 0.0;
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| 366 | //Loop on oscillators of element Z
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| 367 | for (G4int iosc=0;iosc<nbOsc;iosc++)
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| 368 | {
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| 369 | G4double S1 = 0.0;
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| 370 | G4double resEnergy = (*(resonanceEnergy->find(iZ)->second))[iosc];
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| 371 | if (theParticle == G4Electron::Electron())
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| 372 | S1 = ComputeStoppingPowerForElectrons(kineticEnergy,cutEnergy,delta,resEnergy);
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| 373 | else if (theParticle == G4Positron::Positron())
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| 374 | S1 = ComputeStoppingPowerForPositrons(kineticEnergy,cutEnergy,delta,resEnergy);
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| 375 | G4double occupNb = (*(occupationNumber->find(iZ)->second))[iosc];
|
|---|
| 376 | stoppingPowerForElement += occupNb*constant*S1;
|
|---|
| 377 | }
|
|---|
| 378 |
|
|---|
| 379 | sPower += stoppingPowerForElement*theAtomNumDensityVector[i];
|
|---|
| 380 | }
|
|---|
| 381 | if (verboseLevel > 2)
|
|---|
| 382 | {
|
|---|
| 383 | G4cout << "G4PenelopeIonisationModel " << G4endl;
|
|---|
| 384 | G4cout << "Stopping power < " << cutEnergy/keV << " keV at " <<
|
|---|
| 385 | kineticEnergy/keV << " keV = " << sPower/(keV/mm) << " keV/mm" << G4endl;
|
|---|
| 386 | }
|
|---|
| 387 | return sPower;
|
|---|
| 388 | }
|
|---|
| 389 |
|
|---|
| 390 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 391 |
|
|---|
| 392 | G4double G4PenelopeIonisationModel::MinEnergyCut(const G4ParticleDefinition*,
|
|---|
| 393 | const G4MaterialCutsCouple*)
|
|---|
| 394 | {
|
|---|
| 395 | return fIntrinsicLowEnergyLimit;
|
|---|
| 396 | }
|
|---|
| 397 |
|
|---|
| 398 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 399 |
|
|---|
| 400 | void G4PenelopeIonisationModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
|
|---|
| 401 | const G4MaterialCutsCouple* couple,
|
|---|
| 402 | const G4DynamicParticle* aDynamicParticle,
|
|---|
| 403 | G4double cutE, G4double)
|
|---|
| 404 | {
|
|---|
| 405 | // Penelope model to sample the final state following an hard inelastic interaction.
|
|---|
| 406 | // It makes use of the Generalised Oscillator Strength (GOS) model from
|
|---|
| 407 | // D. Liljequist, J. Phys. D: Appl. Phys. 16 (1983) 1567
|
|---|
| 408 | //
|
|---|
| 409 | // The GOS model is used to calculate the individual cross sections for all
|
|---|
| 410 | // the atomic oscillators coming in the play, taking into account the three
|
|---|
| 411 | // contributions (distant longitudinal collisions, distant transverse collisions and
|
|---|
| 412 | // close collisions). Then the target shell and the interaction channel are
|
|---|
| 413 | // sampled. Final state of the delta-ray (energy, angle) are generated according
|
|---|
| 414 | // to the analytical distributions (dSigma/dW) for the selected interaction
|
|---|
| 415 | // channels.
|
|---|
| 416 | // For e-, the maximum energy for the delta-ray is initialEnergy/2. (because
|
|---|
| 417 | // particles are indistinghusbable), while it is the full initialEnergy for
|
|---|
| 418 | // e+.
|
|---|
| 419 | // The efficiency of the random sampling algorithm (e.g. for close collisions)
|
|---|
| 420 | // decreases when initial and cutoff energy increase (e.g. 87% for 10-keV primary
|
|---|
| 421 | // and 1 keV threshold, 99% for 10-MeV primary and 10-keV threshold).
|
|---|
| 422 | // Differential cross sections have a different form for e+ and e-.
|
|---|
| 423 | //
|
|---|
| 424 | // WARNING: The model provides an _average_ description of inelastic collisions.
|
|---|
| 425 | // Anyway, the energy spectrum associated to distant excitations of a given
|
|---|
| 426 | // atomic shell is approximated as a single resonance. The simulated energy spectra
|
|---|
| 427 | // show _unphysical_ narrow peaks at energies that are multiple of the shell
|
|---|
| 428 | // resonance energies. The spurious speaks are automatically smoothed out after
|
|---|
| 429 | // multiple inelastic collisions.
|
|---|
| 430 | //
|
|---|
| 431 | // The model determines also the original shell from which the delta-ray is expelled,
|
|---|
| 432 | // in order to produce fluorescence de-excitation (from G4DeexcitationManager)
|
|---|
| 433 | //
|
|---|
| 434 | // Fermi density correction is calculated analytically according to
|
|---|
| 435 | // U. Fano, Ann. Rev. Nucl. Sci. 13 (1963),1
|
|---|
| 436 |
|
|---|
| 437 | if (verboseLevel > 3)
|
|---|
| 438 | G4cout << "Calling SamplingSecondaries() of G4PenelopeIonisationModel" << G4endl;
|
|---|
| 439 |
|
|---|
| 440 | G4double kineticEnergy0 = aDynamicParticle->GetKineticEnergy();
|
|---|
| 441 | const G4ParticleDefinition* theParticle = aDynamicParticle->GetDefinition();
|
|---|
| 442 |
|
|---|
| 443 | if (kineticEnergy0 <= fIntrinsicLowEnergyLimit)
|
|---|
| 444 | {
|
|---|
| 445 | fParticleChange->SetProposedKineticEnergy(0.);
|
|---|
| 446 | fParticleChange->ProposeLocalEnergyDeposit(kineticEnergy0);
|
|---|
| 447 | return ;
|
|---|
| 448 | }
|
|---|
| 449 | const G4double electronVolumeDensity =
|
|---|
| 450 | couple->GetMaterial()->GetTotNbOfElectPerVolume();
|
|---|
| 451 | G4ParticleMomentum particleDirection0 = aDynamicParticle->GetMomentumDirection();
|
|---|
| 452 |
|
|---|
| 453 | //Initialise final-state variables. The proper values will be set by the methods
|
|---|
| 454 | // CalculateDiscreteForElectrons() and CalculateDiscreteForPositrons()
|
|---|
| 455 | kineticEnergy1=kineticEnergy0;
|
|---|
| 456 | cosThetaPrimary=1.0;
|
|---|
| 457 | energySecondary=0.0;
|
|---|
| 458 | cosThetaSecondary=1.0;
|
|---|
| 459 |
|
|---|
| 460 | // Select randomly one element in the current material
|
|---|
| 461 | if (verboseLevel > 2)
|
|---|
| 462 | G4cout << "Going to select element in " << couple->GetMaterial()->GetName() << G4endl;
|
|---|
| 463 |
|
|---|
| 464 | //Use sampler of G4CrossSectionHandler for now
|
|---|
| 465 | // atom can be selected effitiantly if element selectors are initialised
|
|---|
| 466 | //const G4Element* anElement = SelectRandomAtom(couple,theParticle,kineticEnergy0);
|
|---|
| 467 |
|
|---|
| 468 | G4int iZ = SampleRandomAtom(couple,kineticEnergy0);
|
|---|
| 469 |
|
|---|
| 470 | const G4ProductionCutsTable* theCoupleTable=
|
|---|
| 471 | G4ProductionCutsTable::GetProductionCutsTable();
|
|---|
| 472 | size_t indx = couple->GetIndex();
|
|---|
| 473 | G4double cutG = (*(theCoupleTable->GetEnergyCutsVector(0)))[indx];
|
|---|
| 474 |
|
|---|
| 475 | if (verboseLevel > 2)
|
|---|
| 476 | G4cout << "Selected Z = " << iZ << G4endl;
|
|---|
| 477 |
|
|---|
| 478 | // The method CalculateDiscreteForXXXX() set the private variables:
|
|---|
| 479 | // kineticEnergy1 = energy of the primary electron/positron after the interaction
|
|---|
| 480 | // cosThetaPrimary = std::cos(theta) of the primary after the interaction
|
|---|
| 481 | // energySecondary = energy of the secondary electron
|
|---|
| 482 | // cosThetaSecondary = std::cos(theta) of the secondary
|
|---|
| 483 | if (theParticle == G4Electron::Electron())
|
|---|
| 484 | CalculateDiscreteForElectrons(kineticEnergy0,cutE,iZ,electronVolumeDensity);
|
|---|
| 485 | else if (theParticle == G4Positron::Positron())
|
|---|
| 486 | CalculateDiscreteForPositrons(kineticEnergy0,cutE,iZ,electronVolumeDensity);
|
|---|
| 487 |
|
|---|
| 488 | // if (energySecondary == 0) return;
|
|---|
| 489 |
|
|---|
| 490 | //Update the primary particle
|
|---|
| 491 | G4double sint = std::sqrt(1. - cosThetaPrimary*cosThetaPrimary);
|
|---|
| 492 | G4double phi = twopi * G4UniformRand();
|
|---|
| 493 | G4double dirx = sint * std::cos(phi);
|
|---|
| 494 | G4double diry = sint * std::sin(phi);
|
|---|
| 495 | G4double dirz = cosThetaPrimary;
|
|---|
| 496 |
|
|---|
| 497 | G4ThreeVector electronDirection1(dirx,diry,dirz);
|
|---|
| 498 | electronDirection1.rotateUz(particleDirection0);
|
|---|
| 499 |
|
|---|
| 500 | if (kineticEnergy1 > 0)
|
|---|
| 501 | {
|
|---|
| 502 | fParticleChange->ProposeMomentumDirection(electronDirection1);
|
|---|
| 503 | fParticleChange->SetProposedKineticEnergy(kineticEnergy1);
|
|---|
| 504 | }
|
|---|
| 505 | else
|
|---|
| 506 | {
|
|---|
| 507 | fParticleChange->SetProposedKineticEnergy(0.);
|
|---|
| 508 | }
|
|---|
| 509 |
|
|---|
| 510 | //Generate the delta ray
|
|---|
| 511 | G4int iosc2 = 0;
|
|---|
| 512 | G4double ioniEnergy = 0.0;
|
|---|
| 513 | if (iOsc > 0) {
|
|---|
| 514 | ioniEnergy=(*(ionizationEnergy->find(iZ)->second))[iOsc];
|
|---|
| 515 | iosc2 = (ionizationEnergy->find(iZ)->second->size()) - iOsc; //they are in reversed order
|
|---|
| 516 | }
|
|---|
| 517 |
|
|---|
| 518 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance();
|
|---|
| 519 | G4double bindingEnergy = 0.0;
|
|---|
| 520 | G4int shellId = 0;
|
|---|
| 521 | if (iOsc > 0)
|
|---|
| 522 | {
|
|---|
| 523 | const G4AtomicShell* shell = transitionManager->Shell(iZ,iosc2-1); // Modified by Alf
|
|---|
| 524 | bindingEnergy = shell->BindingEnergy();
|
|---|
| 525 | shellId = shell->ShellId();
|
|---|
| 526 | }
|
|---|
| 527 |
|
|---|
| 528 | G4double ionEnergy = bindingEnergy; //energy spent to ionise the atom according to G4dabatase
|
|---|
| 529 | G4double eKineticEnergy = energySecondary;
|
|---|
| 530 |
|
|---|
| 531 | //This is an awful thing: Penelope generates the fluorescence only for L and K shells
|
|---|
| 532 | //(i.e. Osc = 1 --> 4). For high-Z, the other shells can be quite relevant. In this case
|
|---|
| 533 | //one MUST ensure ''by hand'' the energy conservation. Then there is the other problem that
|
|---|
| 534 | //the fluorescence database of Penelope doesn not match that of Geant4.
|
|---|
| 535 |
|
|---|
| 536 | G4double energyBalance = kineticEnergy0 - kineticEnergy1 - energySecondary; //Penelope Balance
|
|---|
| 537 |
|
|---|
| 538 | if (std::abs(energyBalance) < 1*eV)
|
|---|
| 539 | //in this case Penelope didn't subtract the fluorescence energy: do here by hand
|
|---|
| 540 | eKineticEnergy = energySecondary - bindingEnergy;
|
|---|
| 541 | else
|
|---|
| 542 | //Penelope subtracted the fluorescence, but one has to match the databases
|
|---|
| 543 | eKineticEnergy = energySecondary+ioniEnergy-bindingEnergy;
|
|---|
| 544 |
|
|---|
| 545 | G4double localEnergyDeposit = ionEnergy;
|
|---|
| 546 | G4double energyInFluorescence = 0.0*eV;
|
|---|
| 547 |
|
|---|
| 548 | if(DeexcitationFlag() && iZ > 5)
|
|---|
| 549 | {
|
|---|
| 550 | if (ionEnergy > cutG || ionEnergy > cutE)
|
|---|
| 551 | {
|
|---|
| 552 | deexcitationManager.SetCutForSecondaryPhotons(cutG);
|
|---|
| 553 | deexcitationManager.SetCutForAugerElectrons(cutE);
|
|---|
| 554 | std::vector<G4DynamicParticle*> *photonVector =
|
|---|
| 555 | deexcitationManager.GenerateParticles(iZ,shellId);
|
|---|
| 556 | //Check for secondaries
|
|---|
| 557 | if(photonVector)
|
|---|
| 558 | {
|
|---|
| 559 | for (size_t k=0;k<photonVector->size();k++)
|
|---|
| 560 | {
|
|---|
| 561 | G4DynamicParticle* aPhoton = (*photonVector)[k];
|
|---|
| 562 | if (aPhoton)
|
|---|
| 563 | {
|
|---|
| 564 | G4double itsEnergy = aPhoton->GetKineticEnergy();
|
|---|
| 565 | if (itsEnergy <= localEnergyDeposit)
|
|---|
| 566 | {
|
|---|
| 567 | if(aPhoton->GetDefinition() == G4Gamma::Gamma())
|
|---|
| 568 | energyInFluorescence += itsEnergy;
|
|---|
| 569 | localEnergyDeposit -= itsEnergy;
|
|---|
| 570 | fvect->push_back(aPhoton);
|
|---|
| 571 | }
|
|---|
| 572 | else
|
|---|
| 573 | {
|
|---|
| 574 | delete aPhoton;
|
|---|
| 575 | (*photonVector)[k] = 0;
|
|---|
| 576 | }
|
|---|
| 577 | }
|
|---|
| 578 | }
|
|---|
| 579 | delete photonVector;
|
|---|
| 580 | }
|
|---|
| 581 | }
|
|---|
| 582 | }
|
|---|
| 583 |
|
|---|
| 584 | // Generate the delta ray
|
|---|
| 585 | G4double sin2 = std::sqrt(1. - cosThetaSecondary*cosThetaSecondary);
|
|---|
| 586 | G4double phi2 = twopi * G4UniformRand();
|
|---|
| 587 |
|
|---|
| 588 | G4double xEl = sin2 * std::cos(phi2);
|
|---|
| 589 | G4double yEl = sin2 * std::sin(phi2);
|
|---|
| 590 | G4double zEl = cosThetaSecondary;
|
|---|
| 591 | G4ThreeVector eDirection(xEl,yEl,zEl); //electron direction
|
|---|
| 592 | eDirection.rotateUz(particleDirection0);
|
|---|
| 593 |
|
|---|
| 594 | G4DynamicParticle* deltaElectron = new G4DynamicParticle (G4Electron::Electron(),
|
|---|
| 595 | eDirection,eKineticEnergy) ;
|
|---|
| 596 | fvect->push_back(deltaElectron);
|
|---|
| 597 |
|
|---|
| 598 | if (localEnergyDeposit < 0)
|
|---|
| 599 | {
|
|---|
| 600 | G4cout << "WARNING-"
|
|---|
| 601 | << "G4PenelopeIonisationModel::SampleSecondaries - Negative energy deposit"
|
|---|
| 602 | << G4endl;
|
|---|
| 603 | localEnergyDeposit=0.;
|
|---|
| 604 | }
|
|---|
| 605 | fParticleChange->ProposeLocalEnergyDeposit(localEnergyDeposit);
|
|---|
| 606 |
|
|---|
| 607 | if (verboseLevel > 1)
|
|---|
| 608 | {
|
|---|
| 609 | G4cout << "-----------------------------------------------------------" << G4endl;
|
|---|
| 610 | G4cout << "Energy balance from G4PenelopeIonisation" << G4endl;
|
|---|
| 611 | G4cout << "Incoming primary energy: " << kineticEnergy0/keV << " keV" << G4endl;
|
|---|
| 612 | G4cout << "-----------------------------------------------------------" << G4endl;
|
|---|
| 613 | G4cout << "Outgoing primary energy: " << kineticEnergy1/keV << " keV" << G4endl;
|
|---|
| 614 | G4cout << "Delta ray " << eKineticEnergy/keV << " keV" << G4endl;
|
|---|
| 615 | G4cout << "Fluorescence: " << energyInFluorescence/keV << " keV" << G4endl;
|
|---|
| 616 | G4cout << "Local energy deposit " << localEnergyDeposit/keV << " keV" << G4endl;
|
|---|
| 617 | G4cout << "Total final state: " << (eKineticEnergy+energyInFluorescence+kineticEnergy1+
|
|---|
| 618 | localEnergyDeposit)/keV <<
|
|---|
| 619 | " keV" << G4endl;
|
|---|
| 620 | G4cout << "-----------------------------------------------------------" << G4endl;
|
|---|
| 621 | }
|
|---|
| 622 | if (verboseLevel > 0)
|
|---|
| 623 | {
|
|---|
| 624 | G4double energyDiff = std::fabs(eKineticEnergy+energyInFluorescence+kineticEnergy1+
|
|---|
| 625 | localEnergyDeposit-kineticEnergy0);
|
|---|
| 626 | if (energyDiff > 0.05*keV)
|
|---|
| 627 | G4cout << "Warning from G4PenelopeIonisation: problem with energy conservation: " <<
|
|---|
| 628 | (eKineticEnergy+energyInFluorescence+kineticEnergy1+localEnergyDeposit)/keV <<
|
|---|
| 629 | " keV (final) vs. " <<
|
|---|
| 630 | kineticEnergy0/keV << " keV (initial)" << G4endl;
|
|---|
| 631 | }
|
|---|
| 632 | }
|
|---|
| 633 |
|
|---|
| 634 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 635 |
|
|---|
| 636 | void G4PenelopeIonisationModel::ReadData()
|
|---|
| 637 | {
|
|---|
| 638 | if (verboseLevel > 2)
|
|---|
| 639 | {
|
|---|
| 640 | G4cout << "Data from G4PenelopeIonisationModel read " << G4endl;
|
|---|
| 641 | }
|
|---|
| 642 | char* path = getenv("G4LEDATA");
|
|---|
| 643 | if (!path)
|
|---|
| 644 | {
|
|---|
| 645 | G4String excep = "G4PenelopeIonisationModel - G4LEDATA environment variable not set!";
|
|---|
| 646 | G4Exception(excep);
|
|---|
| 647 | return;
|
|---|
| 648 | }
|
|---|
| 649 | G4String pathString(path);
|
|---|
| 650 | G4String pathFile = pathString + "/penelope/ion-pen.dat";
|
|---|
| 651 | std::ifstream file(pathFile);
|
|---|
| 652 |
|
|---|
| 653 | if (!file.is_open())
|
|---|
| 654 | {
|
|---|
| 655 | G4String excep = "G4PenelopeIonisationModel - data file " + pathFile + " not found!";
|
|---|
| 656 | G4Exception(excep);
|
|---|
| 657 | }
|
|---|
| 658 |
|
|---|
| 659 | if (!ionizationEnergy || !resonanceEnergy || !occupationNumber || !shellFlag)
|
|---|
| 660 | {
|
|---|
| 661 | G4String excep = "G4PenelopeIonisationModel: problem with reading data from file";
|
|---|
| 662 | G4Exception(excep);
|
|---|
| 663 | return;
|
|---|
| 664 | }
|
|---|
| 665 |
|
|---|
| 666 | G4int Z=1,nLevels=0;
|
|---|
| 667 | G4int test,test1;
|
|---|
| 668 |
|
|---|
| 669 | do{
|
|---|
| 670 | file >> Z >> nLevels;
|
|---|
| 671 | //Check for nLevels validity, before using it in a loop
|
|---|
| 672 | if (nLevels<0 || nLevels>64)
|
|---|
| 673 | {
|
|---|
| 674 | G4String excep = "G4PenelopeIonisationModel: corrupted data file ?";
|
|---|
| 675 | G4Exception(excep);
|
|---|
| 676 | return;
|
|---|
| 677 | }
|
|---|
| 678 | //Allocate space for storage
|
|---|
| 679 | G4DataVector* occVector = new G4DataVector;
|
|---|
| 680 | G4DataVector* ionEVector = new G4DataVector;
|
|---|
| 681 | G4DataVector* resEVector = new G4DataVector;
|
|---|
| 682 | G4DataVector* shellIndVector = new G4DataVector;
|
|---|
| 683 | //
|
|---|
| 684 | G4double a1,a2,a3,a4;
|
|---|
| 685 | G4int k1,k2,k3;
|
|---|
| 686 | for (G4int h=0;h<nLevels;h++)
|
|---|
| 687 | {
|
|---|
| 688 | //index,occup number,ion energy,res energy,fj0,kz,shell flag
|
|---|
| 689 | file >> k1 >> a1 >> a2 >> a3 >> a4 >> k2 >> k3;
|
|---|
| 690 | //Make explicit unit of measurements for ionisation and resonance energy,
|
|---|
| 691 | // which is MeV
|
|---|
| 692 | a2 *= MeV;
|
|---|
| 693 | a3 *= MeV;
|
|---|
| 694 | //
|
|---|
| 695 | occVector->push_back(a1);
|
|---|
| 696 | ionEVector->push_back(a2);
|
|---|
| 697 | resEVector->push_back(a3);
|
|---|
| 698 | shellIndVector->push_back((G4double) k3);
|
|---|
| 699 | }
|
|---|
| 700 | //Ok, done for element Z
|
|---|
| 701 | occupationNumber->insert(std::make_pair(Z,occVector));
|
|---|
| 702 | ionizationEnergy->insert(std::make_pair(Z,ionEVector));
|
|---|
| 703 | resonanceEnergy->insert(std::make_pair(Z,resEVector));
|
|---|
| 704 | shellFlag->insert(std::make_pair(Z,shellIndVector));
|
|---|
| 705 | file >> test >> test1; //-1 -1 close the data for each Z
|
|---|
| 706 | if (test > 0) {
|
|---|
| 707 | G4String excep = "G4PenelopeIonisationModel - data file corrupted!";
|
|---|
| 708 | G4Exception(excep);
|
|---|
| 709 | }
|
|---|
| 710 | }while (test != -2); //the very last Z is closed with -2 instead of -1
|
|---|
| 711 | }
|
|---|
| 712 |
|
|---|
| 713 |
|
|---|
| 714 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 715 |
|
|---|
| 716 | G4double G4PenelopeIonisationModel::CalculateDeltaFermi(G4double kinEnergy ,G4int Z,
|
|---|
| 717 | G4double electronVolumeDensity)
|
|---|
| 718 | {
|
|---|
| 719 | G4double plasmaEnergyCoefficient = 1.377e-39*(MeV*MeV*m3); //(e*hbar)^2/(epsilon0*electron_mass)
|
|---|
| 720 | G4double plasmaEnergySquared = plasmaEnergyCoefficient*electronVolumeDensity;
|
|---|
| 721 | // std::sqrt(plasmaEnergySquared) is the plasma energy of the solid (MeV)
|
|---|
| 722 | G4double gam = 1.0+kinEnergy/electron_mass_c2;
|
|---|
| 723 | G4double gam2=gam*gam;
|
|---|
| 724 | G4double delta = 0.0;
|
|---|
| 725 |
|
|---|
| 726 | //Density effect
|
|---|
| 727 | G4double TST = ((G4double) Z)/(gam2*plasmaEnergySquared);
|
|---|
| 728 |
|
|---|
| 729 | G4double wl2 = 0.0;
|
|---|
| 730 | G4double fdel=0.0;
|
|---|
| 731 | G4double wr=0;
|
|---|
| 732 | size_t nbOsc = resonanceEnergy->find(Z)->second->size();
|
|---|
| 733 | for(size_t i=0;i<nbOsc;i++)
|
|---|
| 734 | {
|
|---|
| 735 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i];
|
|---|
| 736 | wr = (*(resonanceEnergy->find(Z)->second))[i];
|
|---|
| 737 | fdel += occupNb/(wr*wr+wl2);
|
|---|
| 738 | }
|
|---|
| 739 | if (fdel < TST) return delta;
|
|---|
| 740 | G4double help1 = (*(resonanceEnergy->find(Z)->second))[nbOsc-1];
|
|---|
| 741 | wl2 = help1*help1;
|
|---|
| 742 | do{
|
|---|
| 743 | wl2=wl2*2.0;
|
|---|
| 744 | fdel = 0.0;
|
|---|
| 745 | for (size_t ii=0;ii<nbOsc;ii++){
|
|---|
| 746 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[ii];
|
|---|
| 747 | wr = (*(resonanceEnergy->find(Z)->second))[ii];
|
|---|
| 748 | fdel += occupNb/(wr*wr+wl2);
|
|---|
| 749 | }
|
|---|
| 750 | }while (fdel > TST);
|
|---|
| 751 | G4double wl2l=0.0;
|
|---|
| 752 | G4double wl2u = wl2;
|
|---|
| 753 | G4double control = 0.0;
|
|---|
| 754 | do{
|
|---|
| 755 | wl2=0.5*(wl2l+wl2u);
|
|---|
| 756 | fdel = 0.0;
|
|---|
| 757 | for (size_t jj=0;jj<nbOsc;jj++){
|
|---|
| 758 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[jj];
|
|---|
| 759 | wr = (*(resonanceEnergy->find(Z)->second))[jj];
|
|---|
| 760 | fdel += occupNb/(wr*wr+wl2);
|
|---|
| 761 | }
|
|---|
| 762 | if (fdel > TST)
|
|---|
| 763 | wl2l = wl2;
|
|---|
| 764 | else
|
|---|
| 765 | wl2u = wl2;
|
|---|
| 766 | control = wl2u-wl2l-wl2*1e-12;
|
|---|
| 767 | }while(control>0);
|
|---|
| 768 |
|
|---|
| 769 | //Density correction effect
|
|---|
| 770 | for (size_t kk=0;kk<nbOsc;kk++){
|
|---|
| 771 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[kk];
|
|---|
| 772 | wr = (*(resonanceEnergy->find(Z)->second))[kk];
|
|---|
| 773 | delta += occupNb*std::log(1.0+wl2/(wr*wr));
|
|---|
| 774 | }
|
|---|
| 775 | delta = (delta/((G4double) Z))-wl2/(gam2*plasmaEnergySquared);
|
|---|
| 776 | return delta;
|
|---|
| 777 | }
|
|---|
| 778 |
|
|---|
| 779 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 780 |
|
|---|
| 781 | void
|
|---|
| 782 | G4PenelopeIonisationModel::CalculateDiscreteForElectrons(G4double kinEnergy,
|
|---|
| 783 | G4double cutoffEnergy,
|
|---|
| 784 | G4int Z,
|
|---|
| 785 | G4double electronVolumeDensity)
|
|---|
| 786 | {
|
|---|
| 787 | if (verboseLevel > 2)
|
|---|
| 788 | G4cout << "Entering in CalculateDiscreteForElectrons() for energy " <<
|
|---|
| 789 | kinEnergy/keV << " keV " << G4endl;
|
|---|
| 790 |
|
|---|
| 791 | //Initialization of variables to be calculated in this routine
|
|---|
| 792 | kineticEnergy1=kinEnergy;
|
|---|
| 793 | cosThetaPrimary=1.0;
|
|---|
| 794 | energySecondary=0.0;
|
|---|
| 795 | cosThetaSecondary=1.0;
|
|---|
| 796 | iOsc=-1;
|
|---|
| 797 |
|
|---|
| 798 | //constants
|
|---|
| 799 | G4double rb=kinEnergy+2.0*electron_mass_c2;
|
|---|
| 800 | G4double gamma = 1.0+kinEnergy/electron_mass_c2;
|
|---|
| 801 | G4double gamma2 = gamma*gamma;
|
|---|
| 802 | G4double beta2 = (gamma2-1.0)/gamma2;
|
|---|
| 803 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2;
|
|---|
| 804 | G4double cps = kinEnergy*rb;
|
|---|
| 805 | G4double cp = std::sqrt(cps);
|
|---|
| 806 |
|
|---|
| 807 | G4double delta = CalculateDeltaFermi(kinEnergy,Z,electronVolumeDensity);
|
|---|
| 808 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0);
|
|---|
| 809 |
|
|---|
| 810 | G4double rl,rl1;
|
|---|
| 811 |
|
|---|
| 812 | if (cutoffEnergy > kinEnergy) return; //delta rays are not generated
|
|---|
| 813 |
|
|---|
| 814 | G4DataVector* qm = new G4DataVector();
|
|---|
| 815 | G4DataVector* cumulHardCS = new G4DataVector();
|
|---|
| 816 | std::vector<G4int> *typeOfInteraction = new std::vector<G4int>;
|
|---|
| 817 | G4DataVector* nbOfLevel = new G4DataVector();
|
|---|
| 818 |
|
|---|
| 819 | //Hard close collisions with outer shells
|
|---|
| 820 | G4double wmaxc = 0.5*kinEnergy;
|
|---|
| 821 | G4double closeCS0 = 0.0;
|
|---|
| 822 | G4double closeCS = 0.0;
|
|---|
| 823 | if (cutoffEnergy>0.1*eV)
|
|---|
| 824 | {
|
|---|
| 825 | rl=cutoffEnergy/kinEnergy;
|
|---|
| 826 | rl1=1.0-rl;
|
|---|
| 827 | if (rl < 0.5)
|
|---|
| 828 | closeCS0 = (amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/kinEnergy;
|
|---|
| 829 | }
|
|---|
| 830 |
|
|---|
| 831 | // Cross sections for the different oscillators
|
|---|
| 832 |
|
|---|
| 833 | // totalHardCS contains the cumulative hard interaction cross section for the different
|
|---|
| 834 | // excitable levels and the different interaction channels (close, distant, etc.),
|
|---|
| 835 | // i.e.
|
|---|
| 836 | // cumulHardCS[0] = 0.0
|
|---|
| 837 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only)
|
|---|
| 838 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse)
|
|---|
| 839 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close)
|
|---|
| 840 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only)
|
|---|
| 841 | // etc.
|
|---|
| 842 | // This is used for sampling the atomic level which is ionised and the channel of the
|
|---|
| 843 | // interaction.
|
|---|
| 844 | //
|
|---|
| 845 | // For each index iFill of the cumulHardCS vector,
|
|---|
| 846 | // nbOfLevel[iFill] contains the current excitable atomic level and
|
|---|
| 847 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda:
|
|---|
| 848 | // 1 = distant longitudinal interaction
|
|---|
| 849 | // 2 = distant transverse interaction
|
|---|
| 850 | // 3 = close collision
|
|---|
| 851 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy)
|
|---|
| 852 |
|
|---|
| 853 |
|
|---|
| 854 | G4int nOscil = ionizationEnergy->find(Z)->second->size();
|
|---|
| 855 | G4double totalHardCS = 0.0;
|
|---|
| 856 | G4double involvedElectrons = 0.0;
|
|---|
| 857 | for (G4int i=0;i<nOscil;i++){
|
|---|
| 858 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i];
|
|---|
| 859 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i];
|
|---|
| 860 |
|
|---|
| 861 | //Distant excitations
|
|---|
| 862 | if (wi>cutoffEnergy && wi<kinEnergy)
|
|---|
| 863 | {
|
|---|
| 864 | if (wi>(1e-6*kinEnergy))
|
|---|
| 865 | {
|
|---|
| 866 | G4double cpp=std::sqrt((kinEnergy-wi)*(kinEnergy-wi+2.0*electron_mass_c2));
|
|---|
| 867 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+electron_mass_c2*electron_mass_c2)-electron_mass_c2);
|
|---|
| 868 | }
|
|---|
| 869 | else
|
|---|
| 870 | {
|
|---|
| 871 | qm->push_back((wi*wi)/(beta2*2.0*electron_mass_c2));
|
|---|
| 872 | }
|
|---|
| 873 | if ((*qm)[i] < wi)
|
|---|
| 874 | {
|
|---|
| 875 |
|
|---|
| 876 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/
|
|---|
| 877 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi;
|
|---|
| 878 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 879 | typeOfInteraction->push_back(1); //distant longitudinal
|
|---|
| 880 | nbOfLevel->push_back((G4double) i); //only excitable level are counted
|
|---|
| 881 | totalHardCS += distantLongitCS;
|
|---|
| 882 |
|
|---|
| 883 | G4double distantTransvCS = occupNb*distantTransvCS0/wi;
|
|---|
| 884 |
|
|---|
| 885 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 886 | typeOfInteraction->push_back(2); //distant tranverse
|
|---|
| 887 | nbOfLevel->push_back((G4double) i);
|
|---|
| 888 | totalHardCS += distantTransvCS;
|
|---|
| 889 | }
|
|---|
| 890 | }
|
|---|
| 891 | else
|
|---|
| 892 | qm->push_back(wi);
|
|---|
| 893 |
|
|---|
| 894 | //close collisions
|
|---|
| 895 | if(wi < wmaxc)
|
|---|
| 896 | {
|
|---|
| 897 | if (wi < cutoffEnergy)
|
|---|
| 898 | involvedElectrons += occupNb;
|
|---|
| 899 | else
|
|---|
| 900 | {
|
|---|
| 901 | rl=wi/kinEnergy;
|
|---|
| 902 | rl1=1.0-rl;
|
|---|
| 903 | closeCS = occupNb*(amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/kinEnergy;
|
|---|
| 904 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 905 | typeOfInteraction->push_back(3); //close
|
|---|
| 906 | nbOfLevel->push_back((G4double) i);
|
|---|
| 907 | totalHardCS += closeCS;
|
|---|
| 908 | }
|
|---|
| 909 | }
|
|---|
| 910 | } // loop on the levels
|
|---|
| 911 |
|
|---|
| 912 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 913 | typeOfInteraction->push_back(4); //close interaction with outer shells
|
|---|
| 914 | nbOfLevel->push_back(-1.0);
|
|---|
| 915 | totalHardCS += involvedElectrons*closeCS0;
|
|---|
| 916 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS
|
|---|
| 917 |
|
|---|
| 918 | if (totalHardCS < 1e-30) {
|
|---|
| 919 | kineticEnergy1=kinEnergy;
|
|---|
| 920 | cosThetaPrimary=1.0;
|
|---|
| 921 | energySecondary=0.0;
|
|---|
| 922 | cosThetaSecondary=0.0;
|
|---|
| 923 | iOsc=-1;
|
|---|
| 924 | delete qm;
|
|---|
| 925 | delete cumulHardCS;
|
|---|
| 926 | delete typeOfInteraction;
|
|---|
| 927 | delete nbOfLevel;
|
|---|
| 928 | return;
|
|---|
| 929 | }
|
|---|
| 930 |
|
|---|
| 931 | //Testing purposes
|
|---|
| 932 | if (verboseLevel > 6)
|
|---|
| 933 | {
|
|---|
| 934 | for (size_t t=0;t<cumulHardCS->size();t++)
|
|---|
| 935 | G4cout << (*cumulHardCS)[t] << " " << (*typeOfInteraction)[t] <<
|
|---|
| 936 | " " << (*nbOfLevel)[t] << G4endl;
|
|---|
| 937 | }
|
|---|
| 938 |
|
|---|
| 939 | //Selection of the active oscillator on the basis of the cumulative cross sections
|
|---|
| 940 | G4double TST = totalHardCS*G4UniformRand();
|
|---|
| 941 | G4int is=0;
|
|---|
| 942 | G4int js= nbOfLevel->size();
|
|---|
| 943 | do{
|
|---|
| 944 | G4int it=(is+js)/2;
|
|---|
| 945 | if (TST > (*cumulHardCS)[it]) is=it;
|
|---|
| 946 | if (TST <= (*cumulHardCS)[it]) js=it;
|
|---|
| 947 | }while((js-is) > 1);
|
|---|
| 948 |
|
|---|
| 949 | G4double UII=0.0;
|
|---|
| 950 | G4double rkc=cutoffEnergy/kinEnergy;
|
|---|
| 951 | G4double dde;
|
|---|
| 952 | G4int kks;
|
|---|
| 953 |
|
|---|
| 954 | G4int sampledInteraction = (*typeOfInteraction)[is];
|
|---|
| 955 | iOsc = (G4int) (*nbOfLevel)[is];
|
|---|
| 956 |
|
|---|
| 957 | if (verboseLevel > 4)
|
|---|
| 958 | G4cout << "Chosen interaction #:" << sampledInteraction << " on level " << iOsc << G4endl;
|
|---|
| 959 |
|
|---|
| 960 | //Generates the final state according to the sampled level and
|
|---|
| 961 | //interaction channel
|
|---|
| 962 |
|
|---|
| 963 | if (sampledInteraction == 1) //Hard distant longitudinal collisions
|
|---|
| 964 | {
|
|---|
| 965 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc];
|
|---|
| 966 | kineticEnergy1=kinEnergy-dde;
|
|---|
| 967 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2)));
|
|---|
| 968 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2));
|
|---|
| 969 | G4double qtrev = q*(q+2.0*electron_mass_c2);
|
|---|
| 970 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2);
|
|---|
| 971 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps));
|
|---|
| 972 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0;
|
|---|
| 973 | //Energy and emission angle of the delta ray
|
|---|
| 974 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc];
|
|---|
| 975 | //kks > 4 means that we are in an outer shell
|
|---|
| 976 | if (kks>4)
|
|---|
| 977 | energySecondary=dde;
|
|---|
| 978 | else
|
|---|
| 979 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc];
|
|---|
| 980 |
|
|---|
| 981 | cosThetaSecondary = 0.5*(dde*(kinEnergy+rb-dde)+qtrev)/std::sqrt(cps*qtrev);
|
|---|
| 982 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0;
|
|---|
| 983 | }
|
|---|
| 984 | else if (sampledInteraction == 2) //Hard distant transverse collisions
|
|---|
| 985 | {
|
|---|
| 986 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc];
|
|---|
| 987 | kineticEnergy1=kinEnergy-dde;
|
|---|
| 988 | cosThetaPrimary=1.0;
|
|---|
| 989 | //Energy and emission angle of the delta ray
|
|---|
| 990 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc];
|
|---|
| 991 | if (kks>4)
|
|---|
| 992 | {
|
|---|
| 993 | energySecondary=dde;
|
|---|
| 994 | }
|
|---|
| 995 | else
|
|---|
| 996 | {
|
|---|
| 997 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc];
|
|---|
| 998 | }
|
|---|
| 999 | cosThetaSecondary = 1.0;
|
|---|
| 1000 | }
|
|---|
| 1001 | else if (sampledInteraction == 3 || sampledInteraction == 4) //Close interaction
|
|---|
| 1002 | {
|
|---|
| 1003 | if (sampledInteraction == 4) //interaction with inner shells
|
|---|
| 1004 | {
|
|---|
| 1005 | UII=0.0;
|
|---|
| 1006 | rkc = cutoffEnergy/kinEnergy;
|
|---|
| 1007 | iOsc = -1;
|
|---|
| 1008 | }
|
|---|
| 1009 | else
|
|---|
| 1010 | {
|
|---|
| 1011 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc];
|
|---|
| 1012 | if (kks > 4) {
|
|---|
| 1013 | UII=0.0;
|
|---|
| 1014 | }
|
|---|
| 1015 | else
|
|---|
| 1016 | {
|
|---|
| 1017 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc];
|
|---|
| 1018 | }
|
|---|
| 1019 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/kinEnergy;
|
|---|
| 1020 | }
|
|---|
| 1021 | G4double A = 0.5*amol;
|
|---|
| 1022 | G4double arkc = A*0.5*rkc;
|
|---|
| 1023 | G4double phi,rk2,rk,rkf;
|
|---|
| 1024 | do{
|
|---|
| 1025 | G4double fb = (1.0+arkc)*G4UniformRand();
|
|---|
| 1026 | if (fb<1.0)
|
|---|
| 1027 | {
|
|---|
| 1028 | rk=rkc/(1.0-fb*(1.0-(rkc*2.0)));
|
|---|
| 1029 | }
|
|---|
| 1030 | else{
|
|---|
| 1031 | rk = rkc+(fb-1.0)*(0.5-rkc)/arkc;
|
|---|
| 1032 | }
|
|---|
| 1033 | rk2 = rk*rk;
|
|---|
| 1034 | rkf = rk/(1.0-rk);
|
|---|
| 1035 | phi = 1.0+(rkf*rkf)-rkf+amol*(rk2+rkf);
|
|---|
| 1036 | }while ((G4UniformRand()*(1.0+A*rk2)) > phi);
|
|---|
| 1037 | //Energy and scattering angle (primary electron);
|
|---|
| 1038 | kineticEnergy1 = kinEnergy*(1.0-rk);
|
|---|
| 1039 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(kinEnergy*(rb-(rk*kinEnergy))));
|
|---|
| 1040 | //Energy and scattering angle of the delta ray
|
|---|
| 1041 | energySecondary = kinEnergy-kineticEnergy1-UII;
|
|---|
| 1042 | cosThetaSecondary = std::sqrt(rk*kinEnergy*rb/(kinEnergy*(rk*kinEnergy+2.0*electron_mass_c2)));
|
|---|
| 1043 | }
|
|---|
| 1044 | else
|
|---|
| 1045 | {
|
|---|
| 1046 | G4String excep = "G4PenelopeIonisationModel - Error in the calculation of the final state";
|
|---|
| 1047 | G4Exception(excep);
|
|---|
| 1048 | }
|
|---|
| 1049 |
|
|---|
| 1050 | delete qm;
|
|---|
| 1051 | delete cumulHardCS;
|
|---|
| 1052 |
|
|---|
| 1053 | delete typeOfInteraction;
|
|---|
| 1054 | delete nbOfLevel;
|
|---|
| 1055 |
|
|---|
| 1056 | return;
|
|---|
| 1057 | }
|
|---|
| 1058 |
|
|---|
| 1059 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 1060 |
|
|---|
| 1061 | void
|
|---|
| 1062 | G4PenelopeIonisationModel::CalculateDiscreteForPositrons(G4double kinEnergy,
|
|---|
| 1063 | G4double cutoffEnergy,
|
|---|
| 1064 | G4int Z,
|
|---|
| 1065 | G4double electronVolumeDensity)
|
|---|
| 1066 | {
|
|---|
| 1067 | kineticEnergy1=kinEnergy;
|
|---|
| 1068 | cosThetaPrimary=1.0;
|
|---|
| 1069 | energySecondary=0.0;
|
|---|
| 1070 | cosThetaSecondary=1.0;
|
|---|
| 1071 | iOsc=-1;
|
|---|
| 1072 | //constants
|
|---|
| 1073 | G4double rb=kinEnergy+2.0*electron_mass_c2;
|
|---|
| 1074 | G4double gamma = 1.0+kinEnergy/electron_mass_c2;
|
|---|
| 1075 | G4double gamma2 = gamma*gamma;
|
|---|
| 1076 | G4double beta2 = (gamma2-1.0)/gamma2;
|
|---|
| 1077 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2;
|
|---|
| 1078 | G4double cps = kinEnergy*rb;
|
|---|
| 1079 | G4double cp = std::sqrt(cps);
|
|---|
| 1080 | G4double help = (gamma+1.0)*(gamma+1.0);
|
|---|
| 1081 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0);
|
|---|
| 1082 | G4double bha2 = amol*(3.0+1.0/help);
|
|---|
| 1083 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help;
|
|---|
| 1084 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help;
|
|---|
| 1085 |
|
|---|
| 1086 | G4double delta = CalculateDeltaFermi(kinEnergy,Z,electronVolumeDensity);
|
|---|
| 1087 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0);
|
|---|
| 1088 |
|
|---|
| 1089 | G4double rl,rl1;
|
|---|
| 1090 |
|
|---|
| 1091 | if (cutoffEnergy > kinEnergy) return; //delta rays are not generated
|
|---|
| 1092 |
|
|---|
| 1093 | G4DataVector* qm = new G4DataVector();
|
|---|
| 1094 | G4DataVector* cumulHardCS = new G4DataVector();
|
|---|
| 1095 | std::vector<G4int> *typeOfInteraction = new std::vector<G4int>;
|
|---|
| 1096 | G4DataVector* nbOfLevel = new G4DataVector();
|
|---|
| 1097 |
|
|---|
| 1098 |
|
|---|
| 1099 | //Hard close collisions with outer shells
|
|---|
| 1100 | G4double wmaxc = kinEnergy;
|
|---|
| 1101 | G4double closeCS0 = 0.0;
|
|---|
| 1102 | G4double closeCS = 0.0;
|
|---|
| 1103 | if (cutoffEnergy>0.1*eV)
|
|---|
| 1104 | {
|
|---|
| 1105 | rl=cutoffEnergy/kinEnergy;
|
|---|
| 1106 | rl1=1.0-rl;
|
|---|
| 1107 | if (rl < 1.0)
|
|---|
| 1108 | closeCS0 = (((1.0/rl)-1.0) + bha1*std::log(rl) + bha2*rl1
|
|---|
| 1109 | + (bha3/2.0)*((rl*rl)-1.0)
|
|---|
| 1110 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/kinEnergy;
|
|---|
| 1111 | }
|
|---|
| 1112 |
|
|---|
| 1113 | // Cross sections for the different oscillators
|
|---|
| 1114 |
|
|---|
| 1115 | // totalHardCS contains the cumulative hard interaction cross section for the different
|
|---|
| 1116 | // excitable levels and the different interaction channels (close, distant, etc.),
|
|---|
| 1117 | // i.e.
|
|---|
| 1118 | // cumulHardCS[0] = 0.0
|
|---|
| 1119 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only)
|
|---|
| 1120 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse)
|
|---|
| 1121 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close)
|
|---|
| 1122 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only)
|
|---|
| 1123 | // etc.
|
|---|
| 1124 | // This is used for sampling the atomic level which is ionised and the channel of the
|
|---|
| 1125 | // interaction.
|
|---|
| 1126 | //
|
|---|
| 1127 | // For each index iFill of the cumulHardCS vector,
|
|---|
| 1128 | // nbOfLevel[iFill] contains the current excitable atomic level and
|
|---|
| 1129 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda:
|
|---|
| 1130 | // 1 = distant longitudinal interaction
|
|---|
| 1131 | // 2 = distant transverse interaction
|
|---|
| 1132 | // 3 = close collision
|
|---|
| 1133 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy)
|
|---|
| 1134 |
|
|---|
| 1135 |
|
|---|
| 1136 | G4int nOscil = ionizationEnergy->find(Z)->second->size();
|
|---|
| 1137 | G4double totalHardCS = 0.0;
|
|---|
| 1138 | G4double involvedElectrons = 0.0;
|
|---|
| 1139 | for (G4int i=0;i<nOscil;i++){
|
|---|
| 1140 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i];
|
|---|
| 1141 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i];
|
|---|
| 1142 | //Distant excitations
|
|---|
| 1143 | if (wi>cutoffEnergy && wi<kinEnergy)
|
|---|
| 1144 | {
|
|---|
| 1145 | if (wi>(1e-6*kinEnergy)){
|
|---|
| 1146 | G4double cpp=std::sqrt((kinEnergy-wi)*(kinEnergy-wi+2.0*electron_mass_c2));
|
|---|
| 1147 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+ electron_mass_c2 * electron_mass_c2)-electron_mass_c2);
|
|---|
| 1148 | }
|
|---|
| 1149 | else
|
|---|
| 1150 | {
|
|---|
| 1151 | qm->push_back(wi*wi/(beta2+2.0*electron_mass_c2));
|
|---|
| 1152 | }
|
|---|
| 1153 | //verificare che quando arriva qui il vettore ha SEMPRE l'i-esimo elemento
|
|---|
| 1154 | if ((*qm)[i] < wi)
|
|---|
| 1155 | {
|
|---|
| 1156 |
|
|---|
| 1157 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/
|
|---|
| 1158 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi;
|
|---|
| 1159 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 1160 | typeOfInteraction->push_back(1); //distant longitudinal
|
|---|
| 1161 | nbOfLevel->push_back((G4double) i); //only excitable level are counted
|
|---|
| 1162 | totalHardCS += distantLongitCS;
|
|---|
| 1163 |
|
|---|
| 1164 | G4double distantTransvCS = occupNb*distantTransvCS0/wi;
|
|---|
| 1165 |
|
|---|
| 1166 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 1167 | typeOfInteraction->push_back(2); //distant tranverse
|
|---|
| 1168 | nbOfLevel->push_back((G4double) i);
|
|---|
| 1169 | totalHardCS += distantTransvCS;
|
|---|
| 1170 | }
|
|---|
| 1171 | }
|
|---|
| 1172 | else
|
|---|
| 1173 | qm->push_back(wi);
|
|---|
| 1174 |
|
|---|
| 1175 | //close collisions
|
|---|
| 1176 | if(wi < wmaxc)
|
|---|
| 1177 | {
|
|---|
| 1178 | if (wi < cutoffEnergy) {
|
|---|
| 1179 | involvedElectrons += occupNb;
|
|---|
| 1180 | }
|
|---|
| 1181 | else
|
|---|
| 1182 | {
|
|---|
| 1183 | rl=wi/kinEnergy;
|
|---|
| 1184 | rl1=1.0-rl;
|
|---|
| 1185 | closeCS = occupNb*(((1.0/rl)-1.0)+bha1*std::log(rl)+bha2*rl1
|
|---|
| 1186 | + (bha3/2.0)*((rl*rl)-1.0)
|
|---|
| 1187 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/kinEnergy;
|
|---|
| 1188 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 1189 | typeOfInteraction->push_back(3); //close
|
|---|
| 1190 | nbOfLevel->push_back((G4double) i);
|
|---|
| 1191 | totalHardCS += closeCS;
|
|---|
| 1192 | }
|
|---|
| 1193 | }
|
|---|
| 1194 | } // loop on the levels
|
|---|
| 1195 |
|
|---|
| 1196 | cumulHardCS->push_back(totalHardCS);
|
|---|
| 1197 | typeOfInteraction->push_back(4); //close interaction with outer shells
|
|---|
| 1198 | nbOfLevel->push_back(-1.0);
|
|---|
| 1199 | totalHardCS += involvedElectrons*closeCS0;
|
|---|
| 1200 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS
|
|---|
| 1201 |
|
|---|
| 1202 | if (totalHardCS < 1e-30) {
|
|---|
| 1203 | kineticEnergy1=kinEnergy;
|
|---|
| 1204 | cosThetaPrimary=1.0;
|
|---|
| 1205 | energySecondary=0.0;
|
|---|
| 1206 | cosThetaSecondary=0.0;
|
|---|
| 1207 | iOsc=-1;
|
|---|
| 1208 | delete qm;
|
|---|
| 1209 | delete cumulHardCS;
|
|---|
| 1210 | delete typeOfInteraction;
|
|---|
| 1211 | delete nbOfLevel;
|
|---|
| 1212 | return;
|
|---|
| 1213 | }
|
|---|
| 1214 |
|
|---|
| 1215 | //Selection of the active oscillator on the basis of the cumulative cross sections
|
|---|
| 1216 | G4double TST = totalHardCS*G4UniformRand();
|
|---|
| 1217 | G4int is=0;
|
|---|
| 1218 | G4int js= nbOfLevel->size();
|
|---|
| 1219 | do{
|
|---|
| 1220 | G4int it=(is+js)/2;
|
|---|
| 1221 | if (TST > (*cumulHardCS)[it]) is=it;
|
|---|
| 1222 | if (TST <= (*cumulHardCS)[it]) js=it;
|
|---|
| 1223 | }while((js-is) > 1);
|
|---|
| 1224 |
|
|---|
| 1225 | G4double UII=0.0;
|
|---|
| 1226 | G4double rkc=cutoffEnergy/kinEnergy;
|
|---|
| 1227 | G4double dde;
|
|---|
| 1228 | G4int kks;
|
|---|
| 1229 |
|
|---|
| 1230 | G4int sampledInteraction = (*typeOfInteraction)[is];
|
|---|
| 1231 | iOsc = (G4int) (*nbOfLevel)[is];
|
|---|
| 1232 |
|
|---|
| 1233 | //Generates the final state according to the sampled level and
|
|---|
| 1234 | //interaction channel
|
|---|
| 1235 |
|
|---|
| 1236 | if (sampledInteraction == 1) //Hard distant longitudinal collisions
|
|---|
| 1237 | {
|
|---|
| 1238 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc];
|
|---|
| 1239 | kineticEnergy1=kinEnergy-dde;
|
|---|
| 1240 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2)));
|
|---|
| 1241 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2));
|
|---|
| 1242 | G4double qtrev = q*(q+2.0*electron_mass_c2);
|
|---|
| 1243 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2);
|
|---|
| 1244 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps));
|
|---|
| 1245 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0;
|
|---|
| 1246 | //Energy and emission angle of the delta ray
|
|---|
| 1247 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc];
|
|---|
| 1248 | if (kks>4)
|
|---|
| 1249 | energySecondary=dde;
|
|---|
| 1250 |
|
|---|
| 1251 | else
|
|---|
| 1252 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc];
|
|---|
| 1253 | cosThetaSecondary = 0.5*(dde*(kinEnergy+rb-dde)+qtrev)/std::sqrt(cps*qtrev);
|
|---|
| 1254 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0;
|
|---|
| 1255 | }
|
|---|
| 1256 | else if (sampledInteraction == 2) //Hard distant transverse collisions
|
|---|
| 1257 | {
|
|---|
| 1258 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc];
|
|---|
| 1259 | kineticEnergy1=kinEnergy-dde;
|
|---|
| 1260 | cosThetaPrimary=1.0;
|
|---|
| 1261 | //Energy and emission angle of the delta ray
|
|---|
| 1262 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc];
|
|---|
| 1263 | if (kks>4)
|
|---|
| 1264 | {
|
|---|
| 1265 | energySecondary=dde;
|
|---|
| 1266 | }
|
|---|
| 1267 | else
|
|---|
| 1268 | {
|
|---|
| 1269 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc];
|
|---|
| 1270 | }
|
|---|
| 1271 | cosThetaSecondary = 1.0;
|
|---|
| 1272 | }
|
|---|
| 1273 | else if (sampledInteraction == 3 || sampledInteraction == 4) //Close interaction
|
|---|
| 1274 | {
|
|---|
| 1275 | if (sampledInteraction == 4) //interaction with inner shells
|
|---|
| 1276 | {
|
|---|
| 1277 | UII=0.0;
|
|---|
| 1278 | rkc = cutoffEnergy/kinEnergy;
|
|---|
| 1279 | iOsc = -1;
|
|---|
| 1280 | }
|
|---|
| 1281 | else
|
|---|
| 1282 | {
|
|---|
| 1283 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc];
|
|---|
| 1284 | if (kks > 4) {
|
|---|
| 1285 | UII=0.0;
|
|---|
| 1286 | }
|
|---|
| 1287 | else
|
|---|
| 1288 | {
|
|---|
| 1289 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc];
|
|---|
| 1290 | }
|
|---|
| 1291 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/kinEnergy;
|
|---|
| 1292 | }
|
|---|
| 1293 | G4double phi,rk;
|
|---|
| 1294 | do{
|
|---|
| 1295 | rk=rkc/(1.0-G4UniformRand()*(1.0-rkc));
|
|---|
| 1296 | phi = 1.0-rk*(bha1-rk*(bha2-rk*(bha3-bha4*rk)));
|
|---|
| 1297 | }while ( G4UniformRand() > phi);
|
|---|
| 1298 | //Energy and scattering angle (primary electron);
|
|---|
| 1299 | kineticEnergy1 = kinEnergy*(1.0-rk);
|
|---|
| 1300 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(kinEnergy*(rb-(rk*kinEnergy))));
|
|---|
| 1301 | //Energy and scattering angle of the delta ray
|
|---|
| 1302 | energySecondary = kinEnergy-kineticEnergy1-UII;
|
|---|
| 1303 | cosThetaSecondary = std::sqrt(rk*kinEnergy*rb/(kinEnergy*(rk*kinEnergy+2.0*electron_mass_c2)));
|
|---|
| 1304 | }
|
|---|
| 1305 | else
|
|---|
| 1306 | {
|
|---|
| 1307 | G4String excep = "G4PenelopeIonisationModel - Error in the calculation of the final state";
|
|---|
| 1308 | G4Exception(excep);
|
|---|
| 1309 | }
|
|---|
| 1310 |
|
|---|
| 1311 | delete qm;
|
|---|
| 1312 | delete cumulHardCS;
|
|---|
| 1313 | delete typeOfInteraction;
|
|---|
| 1314 | delete nbOfLevel;
|
|---|
| 1315 |
|
|---|
| 1316 | return;
|
|---|
| 1317 | }
|
|---|
| 1318 |
|
|---|
| 1319 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 1320 |
|
|---|
| 1321 | G4double
|
|---|
| 1322 | G4PenelopeIonisationModel::CalculateCrossSectionsRatio(G4double kinEnergy,
|
|---|
| 1323 | G4double cutoffEnergy,
|
|---|
| 1324 | G4int Z, G4double electronVolumeDensity,
|
|---|
| 1325 | const G4ParticleDefinition* theParticle)
|
|---|
| 1326 | {
|
|---|
| 1327 | //Constants
|
|---|
| 1328 | G4double gamma = 1.0+kinEnergy/electron_mass_c2;
|
|---|
| 1329 | G4double gamma2 = gamma*gamma;
|
|---|
| 1330 | G4double beta2 = (gamma2-1.0)/gamma2;
|
|---|
| 1331 | G4double constant = pi*classic_electr_radius*classic_electr_radius*2.0*electron_mass_c2/beta2;
|
|---|
| 1332 | G4double delta = CalculateDeltaFermi(kinEnergy,Z,electronVolumeDensity);
|
|---|
| 1333 | G4int nbOsc = (G4int) resonanceEnergy->find(Z)->second->size();
|
|---|
| 1334 | G4double softCS = 0.0;
|
|---|
| 1335 | G4double hardCS = 0.0;
|
|---|
| 1336 | for (G4int i=0;i<nbOsc;i++){
|
|---|
| 1337 | G4double resEnergy = (*(resonanceEnergy->find(Z)->second))[i];
|
|---|
| 1338 | std::pair<G4double,G4double> SoftAndHardXS(0.,0.);
|
|---|
| 1339 | if (theParticle == G4Electron::Electron())
|
|---|
| 1340 | SoftAndHardXS = CrossSectionsRatioForElectrons(kinEnergy,resEnergy,delta,cutoffEnergy);
|
|---|
| 1341 | else if (theParticle == G4Positron::Positron())
|
|---|
| 1342 | SoftAndHardXS = CrossSectionsRatioForPositrons(kinEnergy,resEnergy,delta,cutoffEnergy);
|
|---|
| 1343 | G4double occupNb = (*(occupationNumber->find(Z)->second))[i];
|
|---|
| 1344 | softCS += occupNb*constant*SoftAndHardXS.first;
|
|---|
| 1345 | hardCS += occupNb*constant*SoftAndHardXS.second;
|
|---|
| 1346 | }
|
|---|
| 1347 | G4double ratio = 0.0;
|
|---|
| 1348 |
|
|---|
| 1349 | if (softCS+hardCS) ratio = (hardCS)/(softCS+hardCS);
|
|---|
| 1350 | return ratio;
|
|---|
| 1351 | }
|
|---|
| 1352 |
|
|---|
| 1353 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 1354 |
|
|---|
| 1355 | std::pair<G4double,G4double>
|
|---|
| 1356 | G4PenelopeIonisationModel::CrossSectionsRatioForElectrons(G4double kineticEnergy,
|
|---|
| 1357 | G4double resEnergy,
|
|---|
| 1358 | G4double densityCorrection,
|
|---|
| 1359 | G4double cutoffEnergy)
|
|---|
| 1360 | {
|
|---|
| 1361 | std::pair<G4double,G4double> theResult(0.,0.);
|
|---|
| 1362 | if (kineticEnergy < resEnergy) return theResult;
|
|---|
| 1363 |
|
|---|
| 1364 | //Calculate constants
|
|---|
| 1365 | G4double gamma = 1.0+kineticEnergy/electron_mass_c2;
|
|---|
| 1366 | G4double gamma2 = gamma*gamma;
|
|---|
| 1367 | G4double beta2 = (gamma2-1.0)/gamma2;
|
|---|
| 1368 | G4double cps = kineticEnergy*(kineticEnergy+2.0*electron_mass_c2);
|
|---|
| 1369 | G4double amol = (kineticEnergy/(kineticEnergy+electron_mass_c2)) * (kineticEnergy/(kineticEnergy+electron_mass_c2)) ;
|
|---|
| 1370 | G4double hardCont = 0.0;
|
|---|
| 1371 | G4double softCont = 0.0;
|
|---|
| 1372 |
|
|---|
| 1373 | //Distant interactions
|
|---|
| 1374 | G4double cp1s = (kineticEnergy-resEnergy)*(kineticEnergy-resEnergy+2.0*electron_mass_c2);
|
|---|
| 1375 | G4double cp1 = std::sqrt(cp1s);
|
|---|
| 1376 | G4double cp = std::sqrt(cps);
|
|---|
| 1377 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0;
|
|---|
| 1378 |
|
|---|
| 1379 | //Distant longitudinal interactions
|
|---|
| 1380 | G4double qm = 0.0;
|
|---|
| 1381 |
|
|---|
| 1382 | if (resEnergy > kineticEnergy*(1e-6))
|
|---|
| 1383 | {
|
|---|
| 1384 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2;
|
|---|
| 1385 | }
|
|---|
| 1386 | else
|
|---|
| 1387 | {
|
|---|
| 1388 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2);
|
|---|
| 1389 | qm = qm*(1.0-0.5*qm/electron_mass_c2);
|
|---|
| 1390 | }
|
|---|
| 1391 |
|
|---|
| 1392 | if (qm < resEnergy)
|
|---|
| 1393 | {
|
|---|
| 1394 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2)));
|
|---|
| 1395 | }
|
|---|
| 1396 | else
|
|---|
| 1397 | {
|
|---|
| 1398 | sdLong = 0.0;
|
|---|
| 1399 | }
|
|---|
| 1400 |
|
|---|
| 1401 | if (sdLong > 0) {
|
|---|
| 1402 | sdTrans = std::max(std::log(gamma2)-beta2-densityCorrection,0.0);
|
|---|
| 1403 | sdDist = sdTrans + sdLong;
|
|---|
| 1404 | if (cutoffEnergy > resEnergy)
|
|---|
| 1405 | {
|
|---|
| 1406 | softCont = sdDist/resEnergy;
|
|---|
| 1407 | }
|
|---|
| 1408 | else
|
|---|
| 1409 | {
|
|---|
| 1410 | hardCont = sdDist/resEnergy;
|
|---|
| 1411 | }
|
|---|
| 1412 | }
|
|---|
| 1413 |
|
|---|
| 1414 | // Close collisions (Moeller's cross section)
|
|---|
| 1415 | G4double wl = std::max(cutoffEnergy,resEnergy);
|
|---|
| 1416 | G4double wu = 0.5*kineticEnergy;
|
|---|
| 1417 |
|
|---|
| 1418 | if (wl < (wu-1*eV))
|
|---|
| 1419 | {
|
|---|
| 1420 | hardCont += (1.0/(kineticEnergy-wu))-(1.0/(kineticEnergy-wl))
|
|---|
| 1421 | - (1.0/wu)+(1.0/wl)
|
|---|
| 1422 | + (1.0-amol)*std::log(((kineticEnergy-wu)*wl)/((kineticEnergy-wl)*wu))/kineticEnergy
|
|---|
| 1423 | + amol*(wu-wl)/(kineticEnergy*kineticEnergy);
|
|---|
| 1424 | wu=wl;
|
|---|
| 1425 | }
|
|---|
| 1426 |
|
|---|
| 1427 | wl = resEnergy;
|
|---|
| 1428 | if (wl > (wu-1*eV))
|
|---|
| 1429 | {
|
|---|
| 1430 | theResult.first = softCont;
|
|---|
| 1431 | theResult.second = hardCont;
|
|---|
| 1432 | return theResult;
|
|---|
| 1433 | }
|
|---|
| 1434 | softCont += (1.0/(kineticEnergy-wu))-(1.0/(kineticEnergy-wl))
|
|---|
| 1435 | - (1.0/wu)+(1.0/wl)
|
|---|
| 1436 | + (1.0-amol)*std::log(((kineticEnergy-wu)*wl)/((kineticEnergy-wl)*wu))/kineticEnergy
|
|---|
| 1437 | + amol*(wu-wl)/(kineticEnergy*kineticEnergy);
|
|---|
| 1438 | theResult.first = softCont;
|
|---|
| 1439 | theResult.second = hardCont;
|
|---|
| 1440 | return theResult;
|
|---|
| 1441 | }
|
|---|
| 1442 |
|
|---|
| 1443 |
|
|---|
| 1444 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 1445 |
|
|---|
| 1446 | std::pair<G4double,G4double>
|
|---|
| 1447 | G4PenelopeIonisationModel::CrossSectionsRatioForPositrons(G4double kineticEnergy,
|
|---|
| 1448 | G4double resEnergy,
|
|---|
| 1449 | G4double densityCorrection,
|
|---|
| 1450 | G4double cutoffEnergy)
|
|---|
| 1451 | {
|
|---|
| 1452 |
|
|---|
| 1453 | std::pair<G4double,G4double> theResult(0.,0.);
|
|---|
| 1454 | if (kineticEnergy < resEnergy) return theResult;
|
|---|
| 1455 |
|
|---|
| 1456 | //Calculate constants
|
|---|
| 1457 | G4double gamma = 1.0+kineticEnergy/electron_mass_c2;
|
|---|
| 1458 | G4double gamma2 = gamma*gamma;
|
|---|
| 1459 | G4double beta2 = (gamma2-1.0)/gamma2;
|
|---|
| 1460 | G4double cps = kineticEnergy*(kineticEnergy+2.0*electron_mass_c2);
|
|---|
| 1461 | G4double amol = (kineticEnergy/(kineticEnergy+electron_mass_c2)) * (kineticEnergy/(kineticEnergy+electron_mass_c2)) ;
|
|---|
| 1462 | G4double help = (gamma+1.0)*(gamma+1.0);
|
|---|
| 1463 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0);
|
|---|
| 1464 | G4double bha2 = amol*(3.0+1.0/help);
|
|---|
| 1465 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help;
|
|---|
| 1466 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help;
|
|---|
| 1467 | G4double hardCont = 0.0;
|
|---|
| 1468 | G4double softCont = 0.0;
|
|---|
| 1469 |
|
|---|
| 1470 | //Distant interactions
|
|---|
| 1471 | G4double cp1s = (kineticEnergy-resEnergy)*(kineticEnergy-resEnergy+2.0*electron_mass_c2);
|
|---|
| 1472 | G4double cp1 = std::sqrt(cp1s);
|
|---|
| 1473 | G4double cp = std::sqrt(cps);
|
|---|
| 1474 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0;
|
|---|
| 1475 |
|
|---|
| 1476 | //Distant longitudinal interactions
|
|---|
| 1477 | G4double qm = 0.0;
|
|---|
| 1478 |
|
|---|
| 1479 | if (resEnergy > kineticEnergy*(1e-6))
|
|---|
| 1480 | {
|
|---|
| 1481 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2;
|
|---|
| 1482 | }
|
|---|
| 1483 | else
|
|---|
| 1484 | {
|
|---|
| 1485 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2);
|
|---|
| 1486 | qm = qm*(1.0-0.5*qm/electron_mass_c2);
|
|---|
| 1487 | }
|
|---|
| 1488 |
|
|---|
| 1489 | if (qm < resEnergy)
|
|---|
| 1490 | {
|
|---|
| 1491 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2)));
|
|---|
| 1492 | }
|
|---|
| 1493 | else
|
|---|
| 1494 | {
|
|---|
| 1495 | sdLong = 0.0;
|
|---|
| 1496 | }
|
|---|
| 1497 |
|
|---|
| 1498 | if (sdLong > 0) {
|
|---|
| 1499 | sdTrans = std::max(std::log(gamma2)-beta2-densityCorrection,0.0);
|
|---|
| 1500 | sdDist = sdTrans + sdLong;
|
|---|
| 1501 | if (cutoffEnergy > resEnergy)
|
|---|
| 1502 | {
|
|---|
| 1503 | softCont = sdDist/resEnergy;
|
|---|
| 1504 | }
|
|---|
| 1505 | else
|
|---|
| 1506 | {
|
|---|
| 1507 | hardCont = sdDist/resEnergy;
|
|---|
| 1508 | }
|
|---|
| 1509 | }
|
|---|
| 1510 |
|
|---|
| 1511 |
|
|---|
| 1512 | // Close collisions (Bhabha's cross section)
|
|---|
| 1513 | G4double wl = std::max(cutoffEnergy,resEnergy);
|
|---|
| 1514 | G4double wu = kineticEnergy;
|
|---|
| 1515 |
|
|---|
| 1516 | if (wl < (wu-1*eV)) {
|
|---|
| 1517 | hardCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/kineticEnergy
|
|---|
| 1518 | + bha2*(wu-wl)/(kineticEnergy*kineticEnergy)
|
|---|
| 1519 | -bha3*((wu*wu)-(wl*wl))/(2.0*kineticEnergy*kineticEnergy*kineticEnergy)
|
|---|
| 1520 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*kineticEnergy*kineticEnergy*kineticEnergy*kineticEnergy);
|
|---|
| 1521 | wu=wl;
|
|---|
| 1522 | }
|
|---|
| 1523 | wl = resEnergy;
|
|---|
| 1524 | if (wl > (wu-1*eV))
|
|---|
| 1525 | {
|
|---|
| 1526 | theResult.first = softCont;
|
|---|
| 1527 | theResult.second = hardCont;
|
|---|
| 1528 | return theResult;
|
|---|
| 1529 | }
|
|---|
| 1530 | softCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/kineticEnergy
|
|---|
| 1531 | + bha2*(wu-wl)/(kineticEnergy*kineticEnergy)
|
|---|
| 1532 | -bha3*((wu*wu)-(wl*wl))/(2.0*kineticEnergy*kineticEnergy*kineticEnergy)
|
|---|
| 1533 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*kineticEnergy*kineticEnergy*kineticEnergy*kineticEnergy);
|
|---|
| 1534 |
|
|---|
| 1535 |
|
|---|
| 1536 | theResult.first = softCont;
|
|---|
| 1537 | theResult.second = hardCont;
|
|---|
| 1538 | return theResult;
|
|---|
| 1539 |
|
|---|
| 1540 | }
|
|---|
| 1541 |
|
|---|
| 1542 | G4double G4PenelopeIonisationModel::ComputeStoppingPowerForElectrons(G4double kinEnergy,
|
|---|
| 1543 | G4double cutEnergy,
|
|---|
| 1544 | G4double deltaFermi,
|
|---|
| 1545 | G4double resEnergy)
|
|---|
| 1546 | {
|
|---|
| 1547 | //Calculate constants
|
|---|
| 1548 | G4double gamma = 1.0+kinEnergy/electron_mass_c2;
|
|---|
| 1549 | G4double gamma2 = gamma*gamma;
|
|---|
| 1550 | G4double beta2 = (gamma2-1.0)/gamma2;
|
|---|
| 1551 | G4double cps = kinEnergy*(kinEnergy+2.0*electron_mass_c2);
|
|---|
| 1552 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2;
|
|---|
| 1553 | G4double sPower = 0.0;
|
|---|
| 1554 | if (kinEnergy < resEnergy) return sPower;
|
|---|
| 1555 |
|
|---|
| 1556 | //Distant interactions
|
|---|
| 1557 | G4double cp1s = (kinEnergy-resEnergy)*(kinEnergy-resEnergy+2.0*electron_mass_c2);
|
|---|
| 1558 | G4double cp1 = std::sqrt(cp1s);
|
|---|
| 1559 | G4double cp = std::sqrt(cps);
|
|---|
| 1560 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0;
|
|---|
| 1561 |
|
|---|
| 1562 | //Distant longitudinal interactions
|
|---|
| 1563 | G4double qm = 0.0;
|
|---|
| 1564 |
|
|---|
| 1565 | if (resEnergy > kinEnergy*(1e-6))
|
|---|
| 1566 | {
|
|---|
| 1567 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2;
|
|---|
| 1568 | }
|
|---|
| 1569 | else
|
|---|
| 1570 | {
|
|---|
| 1571 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2);
|
|---|
| 1572 | qm = qm*(1.0-0.5*qm/electron_mass_c2);
|
|---|
| 1573 | }
|
|---|
| 1574 |
|
|---|
| 1575 | if (qm < resEnergy)
|
|---|
| 1576 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2)));
|
|---|
| 1577 | else
|
|---|
| 1578 | sdLong = 0.0;
|
|---|
| 1579 |
|
|---|
| 1580 | if (sdLong > 0) {
|
|---|
| 1581 | sdTrans = std::max(std::log(gamma2)-beta2-deltaFermi,0.0);
|
|---|
| 1582 | sdDist = sdTrans + sdLong;
|
|---|
| 1583 | if (cutEnergy > resEnergy) sPower = sdDist;
|
|---|
| 1584 | }
|
|---|
| 1585 |
|
|---|
| 1586 |
|
|---|
| 1587 | // Close collisions (Moeller's cross section)
|
|---|
| 1588 | G4double wl = std::max(cutEnergy,resEnergy);
|
|---|
| 1589 | G4double wu = 0.5*kinEnergy;
|
|---|
| 1590 |
|
|---|
| 1591 | if (wl < (wu-1*eV)) wu=wl;
|
|---|
| 1592 | wl = resEnergy;
|
|---|
| 1593 | if (wl > (wu-1*eV)) return sPower;
|
|---|
| 1594 | sPower += std::log(wu/wl)+(kinEnergy/(kinEnergy-wu))-(kinEnergy/(kinEnergy-wl))
|
|---|
| 1595 | + (2.0 - amol)*std::log((kinEnergy-wu)/(kinEnergy-wl))
|
|---|
| 1596 | + amol*((wu*wu)-(wl*wl))/(2.0*kinEnergy*kinEnergy);
|
|---|
| 1597 | return sPower;
|
|---|
| 1598 | }
|
|---|
| 1599 |
|
|---|
| 1600 |
|
|---|
| 1601 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 1602 |
|
|---|
| 1603 | G4double G4PenelopeIonisationModel::ComputeStoppingPowerForPositrons(G4double kinEnergy,
|
|---|
| 1604 | G4double cutEnergy,
|
|---|
| 1605 | G4double deltaFermi,
|
|---|
| 1606 | G4double resEnergy)
|
|---|
| 1607 | {
|
|---|
| 1608 | //Calculate constants
|
|---|
| 1609 | G4double gamma = 1.0+kinEnergy/electron_mass_c2;
|
|---|
| 1610 | G4double gamma2 = gamma*gamma;
|
|---|
| 1611 | G4double beta2 = (gamma2-1.0)/gamma2;
|
|---|
| 1612 | G4double cps = kinEnergy*(kinEnergy+2.0*electron_mass_c2);
|
|---|
| 1613 | G4double amol = (kinEnergy/(kinEnergy+electron_mass_c2)) * (kinEnergy/(kinEnergy+electron_mass_c2));
|
|---|
| 1614 | G4double help = (gamma+1.0)*(gamma+1.0);
|
|---|
| 1615 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0);
|
|---|
| 1616 | G4double bha2 = amol*(3.0+1.0/help);
|
|---|
| 1617 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help;
|
|---|
| 1618 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help;
|
|---|
| 1619 |
|
|---|
| 1620 | G4double sPower = 0.0;
|
|---|
| 1621 | if (kinEnergy < resEnergy) return sPower;
|
|---|
| 1622 |
|
|---|
| 1623 | //Distant interactions
|
|---|
| 1624 | G4double cp1s = (kinEnergy-resEnergy)*(kinEnergy-resEnergy+2.0*electron_mass_c2);
|
|---|
| 1625 | G4double cp1 = std::sqrt(cp1s);
|
|---|
| 1626 | G4double cp = std::sqrt(cps);
|
|---|
| 1627 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0;
|
|---|
| 1628 |
|
|---|
| 1629 | //Distant longitudinal interactions
|
|---|
| 1630 | G4double qm = 0.0;
|
|---|
| 1631 |
|
|---|
| 1632 | if (resEnergy > kinEnergy*(1e-6))
|
|---|
| 1633 | {
|
|---|
| 1634 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2;
|
|---|
| 1635 | }
|
|---|
| 1636 | else
|
|---|
| 1637 | {
|
|---|
| 1638 | qm = resEnergy*resEnergy/(beta2*2.0*electron_mass_c2);
|
|---|
| 1639 | qm = qm*(1.0-0.5*qm/electron_mass_c2);
|
|---|
| 1640 | }
|
|---|
| 1641 |
|
|---|
| 1642 | if (qm < resEnergy)
|
|---|
| 1643 | sdLong = std::log(resEnergy*(qm+2.0*electron_mass_c2)/(qm*(resEnergy+2.0*electron_mass_c2)));
|
|---|
| 1644 | else
|
|---|
| 1645 | sdLong = 0.0;
|
|---|
| 1646 |
|
|---|
| 1647 | if (sdLong > 0) {
|
|---|
| 1648 | sdTrans = std::max(std::log(gamma2)-beta2-deltaFermi,0.0);
|
|---|
| 1649 | sdDist = sdTrans + sdLong;
|
|---|
| 1650 | if (cutEnergy > resEnergy) sPower = sdDist;
|
|---|
| 1651 | }
|
|---|
| 1652 |
|
|---|
| 1653 |
|
|---|
| 1654 | // Close collisions (Bhabha's cross section)
|
|---|
| 1655 | G4double wl = std::max(cutEnergy,resEnergy);
|
|---|
| 1656 | G4double wu = kinEnergy;
|
|---|
| 1657 |
|
|---|
| 1658 | if (wl < (wu-1*eV)) wu=wl;
|
|---|
| 1659 | wl = resEnergy;
|
|---|
| 1660 | if (wl > (wu-1*eV)) return sPower;
|
|---|
| 1661 | sPower += std::log(wu/wl)-bha1*(wu-wl)/kinEnergy
|
|---|
| 1662 | + bha2*((wu*wu)-(wl*wl))/(2.0*kinEnergy*kinEnergy)
|
|---|
| 1663 | - bha3*((wu*wu*wu)-(wl*wl*wl))/(3.0*kinEnergy*kinEnergy*kinEnergy)
|
|---|
| 1664 | + bha4*((wu*wu*wu*wu)-(wl*wl*wl*wl))/(4.0*kinEnergy*kinEnergy*kinEnergy*kinEnergy);
|
|---|
| 1665 | return sPower;
|
|---|
| 1666 | }
|
|---|
| 1667 |
|
|---|
| 1668 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
|
|---|
| 1669 |
|
|---|
| 1670 | /* Notice: the methods here above are only temporary. They will become obsolete in a while */
|
|---|
| 1671 |
|
|---|
| 1672 | #include "G4VDataSetAlgorithm.hh"
|
|---|
| 1673 | #include "G4LinLogLogInterpolation.hh"
|
|---|
| 1674 | #include "G4CompositeEMDataSet.hh"
|
|---|
| 1675 | #include "G4EMDataSet.hh"
|
|---|
| 1676 |
|
|---|
| 1677 | std::vector<G4VEMDataSet*>*
|
|---|
| 1678 | G4PenelopeIonisationModel::BuildCrossSectionTable(const G4ParticleDefinition* theParticle)
|
|---|
| 1679 | {
|
|---|
| 1680 | std::vector<G4VEMDataSet*>* set = new std::vector<G4VEMDataSet*>;
|
|---|
| 1681 |
|
|---|
| 1682 | size_t nOfBins = 200;
|
|---|
| 1683 | //Temporary vector, a quick way to produce a log-spaced energy grid
|
|---|
| 1684 | G4PhysicsLogVector* theLogVector = new G4PhysicsLogVector(LowEnergyLimit(),
|
|---|
| 1685 | HighEnergyLimit(),
|
|---|
| 1686 | nOfBins);
|
|---|
| 1687 | G4DataVector* energies;
|
|---|
| 1688 | G4DataVector* cs;
|
|---|
| 1689 |
|
|---|
| 1690 | const G4ProductionCutsTable* theCoupleTable=
|
|---|
| 1691 | G4ProductionCutsTable::GetProductionCutsTable();
|
|---|
| 1692 | size_t numOfCouples = theCoupleTable->GetTableSize();
|
|---|
| 1693 |
|
|---|
| 1694 |
|
|---|
| 1695 | for (size_t m=0; m<numOfCouples; m++)
|
|---|
| 1696 | {
|
|---|
| 1697 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(m);
|
|---|
| 1698 | const G4Material* material= couple->GetMaterial();
|
|---|
| 1699 | const G4ElementVector* elementVector = material->GetElementVector();
|
|---|
| 1700 | const G4double* nAtomsPerVolume = material->GetAtomicNumDensityVector();
|
|---|
| 1701 | G4double electronVolumeDensity =
|
|---|
| 1702 | material->GetTotNbOfElectPerVolume(); //electron density
|
|---|
| 1703 | G4int nElements = material->GetNumberOfElements();
|
|---|
| 1704 |
|
|---|
| 1705 | G4double tcut = (*(theCoupleTable->GetEnergyCutsVector(1)))[couple->GetIndex()];
|
|---|
| 1706 |
|
|---|
| 1707 | G4VDataSetAlgorithm* algo = new G4LinLogLogInterpolation();
|
|---|
| 1708 |
|
|---|
| 1709 | G4VEMDataSet* setForMat = new G4CompositeEMDataSet(algo,1.,1.);
|
|---|
| 1710 |
|
|---|
| 1711 | for (G4int i=0; i<nElements; i++)
|
|---|
| 1712 | {
|
|---|
| 1713 | G4int iZ = (G4int) (*elementVector)[i]->GetZ();
|
|---|
| 1714 | energies = new G4DataVector;
|
|---|
| 1715 | cs = new G4DataVector;
|
|---|
| 1716 | G4double density = nAtomsPerVolume[i];
|
|---|
| 1717 | for (size_t bin=0; bin<nOfBins; bin++)
|
|---|
| 1718 | {
|
|---|
| 1719 | G4double e = theLogVector->GetLowEdgeEnergy(bin);
|
|---|
| 1720 | energies->push_back(e);
|
|---|
| 1721 | G4double value = 0.0;
|
|---|
| 1722 | if(e > tcut)
|
|---|
| 1723 | {
|
|---|
| 1724 | G4double ratio = CalculateCrossSectionsRatio(e,tcut,iZ,
|
|---|
| 1725 | electronVolumeDensity,
|
|---|
| 1726 | theParticle);
|
|---|
| 1727 | value = crossSectionHandler->FindValue(iZ,e)*ratio*density;
|
|---|
| 1728 | }
|
|---|
| 1729 | cs->push_back(value);
|
|---|
| 1730 | }
|
|---|
| 1731 | G4VDataSetAlgorithm* algo1 = algo->Clone();
|
|---|
| 1732 | G4VEMDataSet* elSet = new G4EMDataSet(i,energies,cs,algo1,1.,1.);
|
|---|
| 1733 | setForMat->AddComponent(elSet);
|
|---|
| 1734 | }
|
|---|
| 1735 | set->push_back(setForMat);
|
|---|
| 1736 | }
|
|---|
| 1737 | delete theLogVector;
|
|---|
| 1738 | return set;
|
|---|
| 1739 | }
|
|---|
| 1740 |
|
|---|
| 1741 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
|
|---|
| 1742 |
|
|---|
| 1743 | G4int G4PenelopeIonisationModel::SampleRandomAtom(const G4MaterialCutsCouple* couple,
|
|---|
| 1744 | G4double e) const
|
|---|
| 1745 | {
|
|---|
| 1746 | // Select randomly an element within the material, according to the weight
|
|---|
| 1747 | // determined by the cross sections in the data set
|
|---|
| 1748 |
|
|---|
| 1749 | const G4Material* material = couple->GetMaterial();
|
|---|
| 1750 | G4int nElements = material->GetNumberOfElements();
|
|---|
| 1751 |
|
|---|
| 1752 | // Special case: the material consists of one element
|
|---|
| 1753 | if (nElements == 1)
|
|---|
| 1754 | {
|
|---|
| 1755 | G4int Z = (G4int) material->GetZ();
|
|---|
| 1756 | return Z;
|
|---|
| 1757 | }
|
|---|
| 1758 |
|
|---|
| 1759 | // Composite material
|
|---|
| 1760 | const G4ElementVector* elementVector = material->GetElementVector();
|
|---|
| 1761 | size_t materialIndex = couple->GetIndex();
|
|---|
| 1762 |
|
|---|
| 1763 | G4VEMDataSet* materialSet = (*theXSTable)[materialIndex];
|
|---|
| 1764 | G4double materialCrossSection0 = 0.0;
|
|---|
| 1765 | G4DataVector cross;
|
|---|
| 1766 | cross.clear();
|
|---|
| 1767 | for ( G4int i=0; i < nElements; i++ )
|
|---|
| 1768 | {
|
|---|
| 1769 | G4double cr = materialSet->GetComponent(i)->FindValue(e);
|
|---|
| 1770 | materialCrossSection0 += cr;
|
|---|
| 1771 | cross.push_back(materialCrossSection0);
|
|---|
| 1772 | }
|
|---|
| 1773 |
|
|---|
| 1774 | G4double random = G4UniformRand() * materialCrossSection0;
|
|---|
| 1775 |
|
|---|
| 1776 | for (G4int k=0 ; k < nElements ; k++ )
|
|---|
| 1777 | {
|
|---|
| 1778 | if (random <= cross[k]) return (G4int) (*elementVector)[k]->GetZ();
|
|---|
| 1779 | }
|
|---|
| 1780 | // It should never get here
|
|---|
| 1781 | return 0;
|
|---|
| 1782 | }
|
|---|
| 1783 |
|
|---|
| 1784 |
|
|---|
| 1785 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
| 1786 |
|
|---|
| 1787 | void G4PenelopeIonisationModel::ActivateAuger(G4bool augerbool)
|
|---|
| 1788 | {
|
|---|
| 1789 | if (!DeexcitationFlag() && augerbool)
|
|---|
| 1790 | {
|
|---|
| 1791 | G4cout << "WARNING - G4PenelopeIonisationModel" << G4endl;
|
|---|
| 1792 | G4cout << "The use of the Atomic Deexcitation Manager is set to false " << G4endl;
|
|---|
| 1793 | G4cout << "Therefore, Auger electrons will be not generated anyway" << G4endl;
|
|---|
| 1794 | }
|
|---|
| 1795 | deexcitationManager.ActivateAugerElectronProduction(augerbool);
|
|---|
| 1796 | if (verboseLevel > 1)
|
|---|
| 1797 | G4cout << "Auger production set to " << augerbool << G4endl;
|
|---|
| 1798 | }
|
|---|
| 1799 |
|
|---|
| 1800 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|---|
