[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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[1192] | 26 | // $Id: G4PenelopeIonisation.cc,v 1.22 2009/06/11 15:47:08 mantero Exp $ |
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[1337] | 27 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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[819] | 28 | // |
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| 29 | // -------------------------------------------------------------- |
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| 30 | // |
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| 31 | // File name: G4PenelopeIonisation |
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| 32 | // |
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| 33 | // Author: Luciano Pandola |
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| 34 | // |
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| 35 | // Creation date: March 2003 |
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| 36 | // |
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| 37 | // Modifications: |
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| 38 | // |
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| 39 | // 25.03.03 L.Pandola First implementation |
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| 40 | // 03.06.03 L.Pandola Added continuous part |
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| 41 | // 30.06.03 L.Pandola Added positrons |
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| 42 | // 01.07.03 L.Pandola Changed cross section files for e- and e+ |
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| 43 | // Interface with PenelopeCrossSectionHandler |
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| 44 | // 18.01.04 M.Mendenhall (Vanderbilt University) [bug report 568] |
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| 45 | // Changed returns in CalculateDiscreteForElectrons() |
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| 46 | // to eliminate leaks |
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| 47 | // 20.01.04 L.Pandola Changed returns in CalculateDiscreteForPositrons() |
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| 48 | // to eliminate the same bug |
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| 49 | // 10.03.04 L.Pandola Bug fixed with reference system of delta rays |
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| 50 | // 17.03.04 L.Pandola Removed unnecessary calls to std::pow(a,b) |
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| 51 | // 18.03.04 L.Pandola Bug fixed in the destructor |
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| 52 | // 01.06.04 L.Pandola StopButAlive for positrons on PostStepDoIt |
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| 53 | // 10.03.05 L.Pandola Fix of bug report 729. The solution works but it is |
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| 54 | // quite un-elegant. Something better to be found. |
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| 55 | // -------------------------------------------------------------- |
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| 56 | |
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| 57 | #include "G4PenelopeIonisation.hh" |
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| 58 | #include "G4PenelopeCrossSectionHandler.hh" |
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| 59 | #include "G4AtomicTransitionManager.hh" |
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| 60 | #include "G4AtomicShell.hh" |
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| 61 | #include "G4eIonisationSpectrum.hh" |
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| 62 | #include "G4VDataSetAlgorithm.hh" |
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| 63 | #include "G4SemiLogInterpolation.hh" |
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| 64 | #include "G4LogLogInterpolation.hh" |
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| 65 | #include "G4EMDataSet.hh" |
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| 66 | #include "G4VEMDataSet.hh" |
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| 67 | #include "G4CompositeEMDataSet.hh" |
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| 68 | #include "G4EnergyLossTables.hh" |
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| 69 | #include "G4UnitsTable.hh" |
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| 70 | #include "G4Electron.hh" |
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| 71 | #include "G4Gamma.hh" |
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| 72 | #include "G4Positron.hh" |
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| 73 | #include "G4ProductionCutsTable.hh" |
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| 74 | #include "G4ProcessManager.hh" |
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| 75 | |
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| 76 | G4PenelopeIonisation::G4PenelopeIonisation(const G4String& nam) |
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| 77 | : G4eLowEnergyLoss(nam), |
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| 78 | crossSectionHandler(0), |
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| 79 | theMeanFreePath(0), |
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| 80 | kineticEnergy1(0.0), |
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| 81 | cosThetaPrimary(1.0), |
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| 82 | energySecondary(0.0), |
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| 83 | cosThetaSecondary(0.0), |
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| 84 | iOsc(-1) |
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| 85 | { |
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| 86 | cutForPhotons = 250.0*eV; |
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| 87 | cutForElectrons = 250.0*eV; |
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| 88 | verboseLevel = 0; |
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| 89 | ionizationEnergy = new std::map<G4int,G4DataVector*>; |
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| 90 | resonanceEnergy = new std::map<G4int,G4DataVector*>; |
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| 91 | occupationNumber = new std::map<G4int,G4DataVector*>; |
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| 92 | shellFlag = new std::map<G4int,G4DataVector*>; |
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| 93 | ReadData(); //Read data from file |
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| 94 | |
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[1055] | 95 | G4cout << G4endl; |
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| 96 | G4cout << "*******************************************************************************" << G4endl; |
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| 97 | G4cout << "*******************************************************************************" << G4endl; |
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| 98 | G4cout << " The class G4PenelopeIonisation is NOT SUPPORTED ANYMORE. " << G4endl; |
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| 99 | G4cout << " It will be REMOVED with the next major release of Geant4. " << G4endl; |
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| 100 | G4cout << " Please consult: https://twiki.cern.ch/twiki/bin/view/Geant4/LoweProcesses" << G4endl; |
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| 101 | G4cout << "*******************************************************************************" << G4endl; |
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| 102 | G4cout << "*******************************************************************************" << G4endl; |
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| 103 | G4cout << G4endl; |
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| 104 | |
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[819] | 105 | } |
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| 106 | |
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| 107 | |
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| 108 | G4PenelopeIonisation::~G4PenelopeIonisation() |
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| 109 | { |
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| 110 | delete crossSectionHandler; |
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| 111 | delete theMeanFreePath; |
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| 112 | for (G4int Z=1;Z<100;Z++) |
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| 113 | { |
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| 114 | if (ionizationEnergy->count(Z)) delete (ionizationEnergy->find(Z)->second); |
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| 115 | if (resonanceEnergy->count(Z)) delete (resonanceEnergy->find(Z)->second); |
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| 116 | if (occupationNumber->count(Z)) delete (occupationNumber->find(Z)->second); |
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| 117 | if (shellFlag->count(Z)) delete (shellFlag->find(Z)->second); |
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| 118 | } |
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| 119 | delete ionizationEnergy; |
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| 120 | delete resonanceEnergy; |
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| 121 | delete occupationNumber; |
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| 122 | delete shellFlag; |
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| 123 | } |
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| 124 | |
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| 125 | |
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| 126 | void G4PenelopeIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType) |
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| 127 | { |
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| 128 | if(verboseLevel > 0) { |
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| 129 | G4cout << "G4PenelopeIonisation::BuildPhysicsTable start" << G4endl; |
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| 130 | } |
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| 131 | |
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| 132 | cutForDelta.clear(); |
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| 133 | |
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| 134 | // Create and fill G4CrossSectionHandler once |
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| 135 | if ( crossSectionHandler != 0 ) delete crossSectionHandler; |
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| 136 | G4VDataSetAlgorithm* interpolation = new G4LogLogInterpolation(); |
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| 137 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
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| 138 | G4double highKineticEnergy = GetUpperBoundEloss(); |
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| 139 | G4int totBin = GetNbinEloss(); |
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| 140 | crossSectionHandler = new G4PenelopeCrossSectionHandler(this,aParticleType, |
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| 141 | interpolation, |
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| 142 | lowKineticEnergy, |
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| 143 | highKineticEnergy, |
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| 144 | totBin); |
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| 145 | |
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| 146 | if (&aParticleType == G4Electron::Electron()) |
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| 147 | { |
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| 148 | crossSectionHandler->LoadData("penelope/ion-cs-el-"); |
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| 149 | } |
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| 150 | else if (&aParticleType == G4Positron::Positron()) |
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| 151 | { |
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| 152 | crossSectionHandler->LoadData("penelope/ion-cs-po-"); |
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| 153 | } |
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| 154 | |
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| 155 | if (verboseLevel > 0) { |
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| 156 | G4cout << GetProcessName() << " is created." << G4endl; |
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| 157 | } |
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| 158 | |
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| 159 | // Build loss table for Ionisation |
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| 160 | |
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| 161 | BuildLossTable(aParticleType); |
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| 162 | |
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| 163 | if(verboseLevel > 0) { |
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| 164 | G4cout << "The loss table is built" |
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| 165 | << G4endl; |
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| 166 | } |
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| 167 | |
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| 168 | if (&aParticleType==G4Electron::Electron()) { |
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| 169 | |
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| 170 | RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable; |
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| 171 | CounterOfElectronProcess++; |
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| 172 | PrintInfoDefinition(); |
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| 173 | |
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| 174 | } else { |
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| 175 | |
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| 176 | RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable; |
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| 177 | CounterOfPositronProcess++; |
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| 178 | PrintInfoDefinition(); |
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| 179 | } |
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| 180 | |
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| 181 | // Build mean free path data using cut values |
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| 182 | |
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| 183 | if( theMeanFreePath ) delete theMeanFreePath; |
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| 184 | theMeanFreePath = crossSectionHandler-> |
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| 185 | BuildMeanFreePathForMaterials(&cutForDelta); |
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| 186 | |
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| 187 | if(verboseLevel > 0) { |
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| 188 | G4cout << "The MeanFreePath table is built" |
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| 189 | << G4endl; |
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| 190 | if(verboseLevel > 1) theMeanFreePath->PrintData(); |
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| 191 | } |
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| 192 | |
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| 193 | // Build common DEDX table for all ionisation processes |
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| 194 | |
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| 195 | BuildDEDXTable(aParticleType); |
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| 196 | |
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| 197 | if (verboseLevel > 0) { |
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| 198 | G4cout << "G4PenelopeIonisation::BuildPhysicsTable end" |
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| 199 | << G4endl; |
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| 200 | } |
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| 201 | } |
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| 202 | |
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| 203 | |
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| 204 | void G4PenelopeIonisation::BuildLossTable( |
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| 205 | const G4ParticleDefinition& aParticleType) |
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| 206 | { |
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| 207 | // Build table for energy loss due to soft brems |
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| 208 | // the tables are built for *MATERIALS* binning is taken from LowEnergyLoss |
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| 209 | |
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| 210 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
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| 211 | G4double highKineticEnergy = GetUpperBoundEloss(); |
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| 212 | size_t totBin = GetNbinEloss(); |
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| 213 | |
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| 214 | // create table |
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| 215 | |
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| 216 | if (theLossTable) { |
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| 217 | theLossTable->clearAndDestroy(); |
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| 218 | delete theLossTable; |
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| 219 | } |
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| 220 | const G4ProductionCutsTable* theCoupleTable= |
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| 221 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 222 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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| 223 | theLossTable = new G4PhysicsTable(numOfCouples); |
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| 224 | |
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| 225 | // Clean up the vector of cuts |
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| 226 | |
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| 227 | cutForDelta.clear(); |
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| 228 | |
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| 229 | // Loop for materials |
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| 230 | |
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| 231 | for (size_t m=0; m<numOfCouples; m++) { |
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| 232 | |
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| 233 | // create physics vector and fill it |
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| 234 | G4PhysicsLogVector* aVector = new G4PhysicsLogVector(lowKineticEnergy, |
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| 235 | highKineticEnergy, |
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| 236 | totBin); |
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| 237 | |
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| 238 | // get material parameters needed for the energy loss calculation |
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| 239 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(m); |
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| 240 | const G4Material* material= couple->GetMaterial(); |
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| 241 | |
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| 242 | // the cut cannot be below lowest limit |
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| 243 | G4double tCut = 0.0; |
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| 244 | tCut = (*(theCoupleTable->GetEnergyCutsVector(1)))[m]; |
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| 245 | tCut = std::min(tCut,highKineticEnergy); |
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| 246 | |
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| 247 | cutForDelta.push_back(tCut); |
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| 248 | |
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| 249 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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| 250 | size_t NumberOfElements = material->GetNumberOfElements() ; |
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| 251 | const G4double* theAtomicNumDensityVector = |
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| 252 | material->GetAtomicNumDensityVector(); |
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| 253 | const G4double electronVolumeDensity = |
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| 254 | material->GetTotNbOfElectPerVolume(); //electron density |
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| 255 | if(verboseLevel > 0) { |
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| 256 | G4cout << "Energy loss for material # " << m |
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| 257 | << " tCut(keV)= " << tCut/keV |
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| 258 | << G4endl; |
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| 259 | } |
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| 260 | |
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| 261 | // now comes the loop for the kinetic energy values |
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| 262 | for (size_t i = 0; i<totBin; i++) { |
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| 263 | |
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| 264 | G4double lowEdgeEnergy = aVector->GetLowEdgeEnergy(i); |
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| 265 | G4double ionloss = 0.; |
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| 266 | |
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| 267 | // loop for elements in the material |
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| 268 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
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| 269 | |
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| 270 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
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| 271 | ionloss += |
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| 272 | CalculateContinuous(lowEdgeEnergy,tCut,Z,electronVolumeDensity, |
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| 273 | aParticleType) * theAtomicNumDensityVector[iel]; |
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| 274 | |
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| 275 | if(verboseLevel > 1) { |
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| 276 | G4cout << "Z= " << Z |
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| 277 | << " E(keV)= " << lowEdgeEnergy/keV |
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| 278 | << " loss= " << ionloss |
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| 279 | << " rho= " << theAtomicNumDensityVector[iel] |
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| 280 | << G4endl; |
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| 281 | } |
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| 282 | } |
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| 283 | aVector->PutValue(i,ionloss); |
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| 284 | } |
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| 285 | theLossTable->insert(aVector); |
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| 286 | } |
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| 287 | } |
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| 288 | |
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| 289 | |
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| 290 | G4VParticleChange* G4PenelopeIonisation::PostStepDoIt(const G4Track& track, |
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| 291 | const G4Step& step) |
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| 292 | { |
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| 293 | aParticleChange.Initialize(track); |
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| 294 | |
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| 295 | const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple(); |
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| 296 | const G4DynamicParticle* incidentElectron = track.GetDynamicParticle(); |
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| 297 | const G4Material* material = couple->GetMaterial(); |
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| 298 | const G4double electronVolumeDensity = |
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| 299 | material->GetTotNbOfElectPerVolume(); //electron density |
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| 300 | const G4ParticleDefinition* aParticleType = track.GetDefinition(); |
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| 301 | G4double kineticEnergy0 = incidentElectron->GetKineticEnergy(); |
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| 302 | G4ParticleMomentum electronDirection0 = incidentElectron->GetMomentumDirection(); |
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| 303 | |
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| 304 | //Inizialisation of variables |
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| 305 | kineticEnergy1=kineticEnergy0; |
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| 306 | cosThetaPrimary=1.0; |
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| 307 | energySecondary=0.0; |
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| 308 | cosThetaSecondary=1.0; |
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| 309 | |
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| 310 | G4int Z = crossSectionHandler->SelectRandomAtom(couple, kineticEnergy0); |
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| 311 | G4int index = couple->GetIndex(); |
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| 312 | G4double tCut = cutForDelta[index]; |
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| 313 | |
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| 314 | if (aParticleType==G4Electron::Electron()){ |
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| 315 | CalculateDiscreteForElectrons(kineticEnergy0,tCut,Z,electronVolumeDensity); |
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| 316 | } |
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| 317 | else if (aParticleType==G4Positron::Positron()){ |
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| 318 | CalculateDiscreteForPositrons(kineticEnergy0,tCut,Z,electronVolumeDensity); |
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| 319 | } |
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| 320 | // the method CalculateDiscrete() sets the private variables: |
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| 321 | // kineticEnergy1 = energy of the primary electron after the interaction |
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| 322 | // cosThetaPrimary = std::cos(theta) of the primary after the interaction |
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| 323 | // energySecondary = energy of the secondary electron |
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| 324 | // cosThetaSecondary = std::cos(theta) of the secondary |
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| 325 | |
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| 326 | if(energySecondary == 0.0) |
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| 327 | { |
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| 328 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
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| 329 | } |
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| 330 | |
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| 331 | //Update the primary particle |
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| 332 | G4double sint = std::sqrt(1. - cosThetaPrimary*cosThetaPrimary); |
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| 333 | G4double phi = twopi * G4UniformRand(); |
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| 334 | G4double dirx = sint * std::cos(phi); |
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| 335 | G4double diry = sint * std::sin(phi); |
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| 336 | G4double dirz = cosThetaPrimary; |
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| 337 | |
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| 338 | G4ThreeVector electronDirection1(dirx,diry,dirz); |
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| 339 | electronDirection1.rotateUz(electronDirection0); |
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| 340 | aParticleChange.ProposeMomentumDirection(electronDirection1) ; |
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| 341 | |
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| 342 | if (kineticEnergy1 > 0.) |
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| 343 | { |
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| 344 | aParticleChange.ProposeEnergy(kineticEnergy1) ; |
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| 345 | } |
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| 346 | else |
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| 347 | { |
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| 348 | aParticleChange.ProposeEnergy(0.) ; |
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| 349 | if (aParticleType->GetProcessManager()->GetAtRestProcessVector()->size()) |
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| 350 | //In this case there is at least one AtRest process |
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| 351 | { |
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| 352 | aParticleChange.ProposeTrackStatus(fStopButAlive); |
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| 353 | } |
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| 354 | else |
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| 355 | { |
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| 356 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 357 | } |
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| 358 | } |
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| 359 | |
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| 360 | //Generate the delta day |
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| 361 | G4int iosc2 = 0; |
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| 362 | G4double ioniEnergy = 0.0; |
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| 363 | if (iOsc > 0) { |
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| 364 | ioniEnergy=(*(ionizationEnergy->find(Z)->second))[iOsc]; |
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| 365 | iosc2 = (ionizationEnergy->find(Z)->second->size()) - iOsc; //they are in reversed order |
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| 366 | } |
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| 367 | |
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| 368 | const G4AtomicTransitionManager* transitionManager = G4AtomicTransitionManager::Instance(); |
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| 369 | G4double bindingEnergy = 0.0; |
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| 370 | G4int shellId = 0; |
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| 371 | if (iOsc > 0){ |
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| 372 | const G4AtomicShell* shell = transitionManager->Shell(Z,iosc2-1); // Modified by Alf |
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| 373 | bindingEnergy = shell->BindingEnergy(); |
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| 374 | shellId = shell->ShellId(); |
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| 375 | } |
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| 376 | |
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| 377 | G4double ionEnergy = bindingEnergy; //energy spent to ionise the atom according to G4dabatase |
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| 378 | G4double eKineticEnergy = energySecondary; |
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| 379 | |
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| 380 | //This is an awful thing: Penelope generates the fluorescence only for L and K shells |
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| 381 | //(i.e. Osc = 1 --> 4). For high-Z, the other shells can be quite relevant. In this case |
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| 382 | //one MUST ensure ''by hand'' the energy conservation. Then there is the other problem that |
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| 383 | //the fluorescence database of Penelope doesn not match that of Geant4. |
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| 384 | |
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| 385 | G4double energyBalance = kineticEnergy0 - kineticEnergy1 - energySecondary; //Penelope Balance |
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| 386 | |
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| 387 | if (std::abs(energyBalance) < 1*eV) |
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| 388 | { |
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| 389 | //in this case Penelope didn't subtract the fluorescence energy: do here by hand |
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| 390 | eKineticEnergy = energySecondary - bindingEnergy; |
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| 391 | } |
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| 392 | else |
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| 393 | { |
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| 394 | //Penelope subtracted the fluorescence, but one has to match the databases |
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| 395 | eKineticEnergy = energySecondary+ioniEnergy-bindingEnergy; |
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| 396 | } |
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| 397 | |
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| 398 | //Now generates the various secondaries |
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| 399 | size_t nTotPhotons=0; |
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| 400 | G4int nPhotons=0; |
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| 401 | |
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| 402 | const G4ProductionCutsTable* theCoupleTable= |
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| 403 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 404 | size_t indx = couple->GetIndex(); |
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| 405 | G4double cutg = (*(theCoupleTable->GetEnergyCutsVector(0)))[indx]; |
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| 406 | cutg = std::min(cutForPhotons,cutg); |
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| 407 | |
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| 408 | G4double cute = (*(theCoupleTable->GetEnergyCutsVector(1)))[indx]; |
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| 409 | cute = std::min(cutForPhotons,cute); |
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| 410 | |
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| 411 | std::vector<G4DynamicParticle*>* photonVector=0; |
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| 412 | G4DynamicParticle* aPhoton; |
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| 413 | if (Z>5 && (ionEnergy > cutg || ionEnergy > cute)) |
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| 414 | { |
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| 415 | photonVector = deexcitationManager.GenerateParticles(Z,shellId); |
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| 416 | nTotPhotons = photonVector->size(); |
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| 417 | for (size_t k=0;k<nTotPhotons;k++){ |
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| 418 | aPhoton = (*photonVector)[k]; |
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| 419 | if (aPhoton) |
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| 420 | { |
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| 421 | G4double itsCut = cutg; |
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| 422 | if (aPhoton->GetDefinition() == G4Electron::Electron()) itsCut = cute; |
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| 423 | G4double itsEnergy = aPhoton->GetKineticEnergy(); |
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| 424 | if (itsEnergy > itsCut && itsEnergy <= ionEnergy) |
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| 425 | { |
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| 426 | nPhotons++; |
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| 427 | ionEnergy -= itsEnergy; |
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| 428 | } |
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| 429 | else |
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| 430 | { |
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| 431 | delete aPhoton; |
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| 432 | (*photonVector)[k]=0; |
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| 433 | } |
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| 434 | } |
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| 435 | } |
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| 436 | } |
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| 437 | G4double energyDeposit=ionEnergy; //il deposito locale e' quello che rimane |
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| 438 | G4int nbOfSecondaries=nPhotons; |
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| 439 | |
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| 440 | |
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| 441 | // Generate the delta ray |
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| 442 | G4double sin2 = std::sqrt(1. - cosThetaSecondary*cosThetaSecondary); |
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| 443 | G4double phi2 = twopi * G4UniformRand(); |
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| 444 | G4DynamicParticle* electron = 0; |
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| 445 | |
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| 446 | G4double xEl = sin2 * std::cos(phi2); |
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| 447 | G4double yEl = sin2 * std::sin(phi2); |
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| 448 | G4double zEl = cosThetaSecondary; |
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| 449 | G4ThreeVector eDirection(xEl,yEl,zEl); //electron direction |
---|
| 450 | eDirection.rotateUz(electronDirection0); |
---|
| 451 | |
---|
| 452 | electron = new G4DynamicParticle (G4Electron::Electron(), |
---|
| 453 | eDirection,eKineticEnergy) ; |
---|
| 454 | nbOfSecondaries++; |
---|
| 455 | |
---|
| 456 | aParticleChange.SetNumberOfSecondaries(nbOfSecondaries); |
---|
| 457 | if (electron) aParticleChange.AddSecondary(electron); |
---|
| 458 | |
---|
| 459 | G4double energySumTest = kineticEnergy1 + eKineticEnergy; |
---|
| 460 | |
---|
| 461 | for (size_t ll=0;ll<nTotPhotons;ll++) |
---|
| 462 | { |
---|
| 463 | aPhoton = (*photonVector)[ll]; |
---|
| 464 | if (aPhoton) { |
---|
| 465 | aParticleChange.AddSecondary(aPhoton); |
---|
| 466 | energySumTest += aPhoton->GetKineticEnergy(); |
---|
| 467 | } |
---|
| 468 | } |
---|
| 469 | delete photonVector; |
---|
| 470 | if (energyDeposit < 0) |
---|
| 471 | { |
---|
| 472 | G4cout << "WARNING-" |
---|
| 473 | << "G4PenelopeIonisaition::PostStepDoIt - Negative energy deposit" |
---|
| 474 | << G4endl; |
---|
| 475 | energyDeposit=0; |
---|
| 476 | } |
---|
| 477 | energySumTest += energyDeposit; |
---|
| 478 | if (std::abs(energySumTest-kineticEnergy0)>1*eV) |
---|
| 479 | { |
---|
| 480 | G4cout << "WARNING-" |
---|
| 481 | << "G4PenelopeIonisaition::PostStepDoIt - Energy non conservation" |
---|
| 482 | << G4endl; |
---|
| 483 | G4cout << "Final energy - initial energy = " << |
---|
| 484 | (energySumTest-kineticEnergy0)/eV << " eV" << G4endl; |
---|
| 485 | } |
---|
| 486 | aParticleChange.ProposeLocalEnergyDeposit(energyDeposit); |
---|
| 487 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
---|
| 488 | } |
---|
| 489 | |
---|
| 490 | |
---|
| 491 | void G4PenelopeIonisation::PrintInfoDefinition() |
---|
| 492 | { |
---|
| 493 | G4String comments = "Total cross sections from EEDL database."; |
---|
| 494 | comments += "\n Delta energy sampled from a parametrised formula."; |
---|
| 495 | comments += "\n Implementation of the continuous dE/dx part."; |
---|
| 496 | comments += "\n At present it can be used for electrons and positrons "; |
---|
| 497 | comments += "in the energy range [250eV,100GeV]."; |
---|
| 498 | comments += "\n The process must work with G4PenelopeBremsstrahlung."; |
---|
| 499 | |
---|
| 500 | G4cout << G4endl << GetProcessName() << ": " << comments << G4endl; |
---|
| 501 | } |
---|
| 502 | |
---|
| 503 | G4bool G4PenelopeIonisation::IsApplicable(const G4ParticleDefinition& particle) |
---|
| 504 | { |
---|
| 505 | return ( (&particle == G4Electron::Electron()) || ( |
---|
| 506 | &particle == G4Positron::Positron()) ); |
---|
| 507 | } |
---|
| 508 | |
---|
| 509 | G4double G4PenelopeIonisation::GetMeanFreePath(const G4Track& track, |
---|
| 510 | G4double, // previousStepSize |
---|
| 511 | G4ForceCondition* cond) |
---|
| 512 | { |
---|
| 513 | *cond = NotForced; |
---|
| 514 | G4int index = (track.GetMaterialCutsCouple())->GetIndex(); |
---|
| 515 | const G4VEMDataSet* data = theMeanFreePath->GetComponent(index); |
---|
| 516 | G4double meanFreePath = data->FindValue(track.GetKineticEnergy()); |
---|
| 517 | return meanFreePath; |
---|
| 518 | } |
---|
| 519 | |
---|
| 520 | void G4PenelopeIonisation::SetCutForLowEnSecPhotons(G4double cut) |
---|
| 521 | { |
---|
| 522 | cutForPhotons = cut; |
---|
| 523 | deexcitationManager.SetCutForSecondaryPhotons(cut); |
---|
| 524 | } |
---|
| 525 | |
---|
| 526 | void G4PenelopeIonisation::SetCutForLowEnSecElectrons(G4double cut) |
---|
| 527 | { |
---|
| 528 | cutForElectrons = cut; |
---|
| 529 | deexcitationManager.SetCutForAugerElectrons(cut); |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | void G4PenelopeIonisation::ActivateAuger(G4bool val) |
---|
| 533 | { |
---|
| 534 | deexcitationManager.ActivateAugerElectronProduction(val); |
---|
| 535 | } |
---|
| 536 | |
---|
| 537 | |
---|
| 538 | void G4PenelopeIonisation::CalculateDiscreteForElectrons(G4double ene,G4double cutoff, |
---|
| 539 | G4int Z,G4double electronVolumeDensity) |
---|
| 540 | { |
---|
| 541 | kineticEnergy1=ene; |
---|
| 542 | cosThetaPrimary=1.0; |
---|
| 543 | energySecondary=0.0; |
---|
| 544 | cosThetaSecondary=1.0; |
---|
| 545 | iOsc=-1; |
---|
| 546 | //constants |
---|
| 547 | G4double rb=ene+2.0*electron_mass_c2; |
---|
| 548 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 549 | G4double gamma2 = gamma*gamma; |
---|
| 550 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 551 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
| 552 | G4double cps = ene*rb; |
---|
| 553 | G4double cp = std::sqrt(cps); |
---|
| 554 | |
---|
| 555 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
| 556 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 557 | |
---|
| 558 | G4double rl,rl1; |
---|
| 559 | |
---|
| 560 | if (cutoff > ene) return; //delta rays are not generated |
---|
| 561 | |
---|
| 562 | G4DataVector* qm = new G4DataVector(); |
---|
| 563 | G4DataVector* cumulHardCS = new G4DataVector(); |
---|
| 564 | G4DataVector* typeOfInteraction = new G4DataVector(); |
---|
| 565 | G4DataVector* nbOfLevel = new G4DataVector(); |
---|
| 566 | |
---|
| 567 | //Hard close collisions with outer shells |
---|
| 568 | G4double wmaxc = 0.5*ene; |
---|
| 569 | G4double closeCS0 = 0.0; |
---|
| 570 | G4double closeCS = 0.0; |
---|
| 571 | if (cutoff>0.1*eV) |
---|
| 572 | { |
---|
| 573 | rl=cutoff/ene; |
---|
| 574 | rl1=1.0-rl; |
---|
| 575 | if (rl < 0.5) |
---|
| 576 | closeCS0 = (amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/ene; |
---|
| 577 | } |
---|
| 578 | |
---|
| 579 | // Cross sections for the different oscillators |
---|
| 580 | |
---|
| 581 | // totalHardCS contains the cumulative hard interaction cross section for the different |
---|
| 582 | // excitable levels and the different interaction channels (close, distant, etc.), |
---|
| 583 | // i.e. |
---|
| 584 | // cumulHardCS[0] = 0.0 |
---|
| 585 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only) |
---|
| 586 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse) |
---|
| 587 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close) |
---|
| 588 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only) |
---|
| 589 | // etc. |
---|
| 590 | // This is used for sampling the atomic level which is ionised and the channel of the |
---|
| 591 | // interaction. |
---|
| 592 | // |
---|
| 593 | // For each index iFill of the cumulHardCS vector, |
---|
| 594 | // nbOfLevel[iFill] contains the current excitable atomic level and |
---|
| 595 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda: |
---|
| 596 | // 1 = distant longitudinal interaction |
---|
| 597 | // 2 = distant transverse interaction |
---|
| 598 | // 3 = close collision |
---|
| 599 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy) |
---|
| 600 | |
---|
| 601 | |
---|
| 602 | G4int nOscil = ionizationEnergy->find(Z)->second->size(); |
---|
| 603 | G4double totalHardCS = 0.0; |
---|
| 604 | G4double involvedElectrons = 0.0; |
---|
| 605 | for (G4int i=0;i<nOscil;i++){ |
---|
| 606 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 607 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
| 608 | //Distant excitations |
---|
| 609 | if (wi>cutoff && wi<ene) |
---|
| 610 | { |
---|
| 611 | if (wi>(1e-6*ene)){ |
---|
| 612 | G4double cpp=std::sqrt((ene-wi)*(ene-wi+2.0*electron_mass_c2)); |
---|
| 613 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+electron_mass_c2*electron_mass_c2)-electron_mass_c2); |
---|
| 614 | } |
---|
| 615 | else |
---|
| 616 | { |
---|
| 617 | qm->push_back((wi*wi)/(beta2*2.0*electron_mass_c2)); |
---|
| 618 | } |
---|
| 619 | //verificare che quando arriva qui il vettore ha SEMPRE l'i-esimo elemento |
---|
| 620 | if ((*qm)[i] < wi) |
---|
| 621 | { |
---|
| 622 | |
---|
| 623 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/ |
---|
| 624 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi; |
---|
| 625 | cumulHardCS->push_back(totalHardCS); |
---|
| 626 | typeOfInteraction->push_back(1.0); //distant longitudinal |
---|
| 627 | nbOfLevel->push_back((G4double) i); //only excitable level are counted |
---|
| 628 | totalHardCS += distantLongitCS; |
---|
| 629 | |
---|
| 630 | G4double distantTransvCS = occupNb*distantTransvCS0/wi; |
---|
| 631 | |
---|
| 632 | cumulHardCS->push_back(totalHardCS); |
---|
| 633 | typeOfInteraction->push_back(2.0); //distant tranverse |
---|
| 634 | nbOfLevel->push_back((G4double) i); |
---|
| 635 | totalHardCS += distantTransvCS; |
---|
| 636 | } |
---|
| 637 | } |
---|
| 638 | else |
---|
| 639 | { |
---|
| 640 | qm->push_back(wi); |
---|
| 641 | } |
---|
| 642 | //close collisions |
---|
| 643 | if(wi < wmaxc){ |
---|
| 644 | if (wi < cutoff) { |
---|
| 645 | involvedElectrons += occupNb; |
---|
| 646 | } |
---|
| 647 | else |
---|
| 648 | { |
---|
| 649 | rl=wi/ene; |
---|
| 650 | rl1=1.0-rl; |
---|
| 651 | closeCS = occupNb*(amol*(0.5-rl)+(1.0/rl)-(1.0/rl1)+(1.0-amol)*std::log(rl/rl1))/ene; |
---|
| 652 | cumulHardCS->push_back(totalHardCS); |
---|
| 653 | typeOfInteraction->push_back(3.0); //close |
---|
| 654 | nbOfLevel->push_back((G4double) i); |
---|
| 655 | totalHardCS += closeCS; |
---|
| 656 | } |
---|
| 657 | } |
---|
| 658 | } // loop on the levels |
---|
| 659 | |
---|
| 660 | cumulHardCS->push_back(totalHardCS); |
---|
| 661 | typeOfInteraction->push_back(4.0); //close interaction with outer shells |
---|
| 662 | nbOfLevel->push_back(-1.0); |
---|
| 663 | totalHardCS += involvedElectrons*closeCS0; |
---|
| 664 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS |
---|
| 665 | |
---|
| 666 | if (totalHardCS < 1e-30) { |
---|
| 667 | kineticEnergy1=ene; |
---|
| 668 | cosThetaPrimary=1.0; |
---|
| 669 | energySecondary=0.0; |
---|
| 670 | cosThetaSecondary=0.0; |
---|
| 671 | iOsc=-1; |
---|
| 672 | delete qm; |
---|
| 673 | delete cumulHardCS; |
---|
| 674 | delete typeOfInteraction; |
---|
| 675 | delete nbOfLevel; |
---|
| 676 | return; |
---|
| 677 | } |
---|
| 678 | |
---|
| 679 | |
---|
| 680 | //Selection of the active oscillator on the basis of the cumulative cross sections |
---|
| 681 | G4double TST = totalHardCS*G4UniformRand(); |
---|
| 682 | G4int is=0; |
---|
| 683 | G4int js= nbOfLevel->size(); |
---|
| 684 | do{ |
---|
| 685 | G4int it=(is+js)/2; |
---|
| 686 | if (TST > (*cumulHardCS)[it]) is=it; |
---|
| 687 | if (TST <= (*cumulHardCS)[it]) js=it; |
---|
| 688 | }while((js-is) > 1); |
---|
| 689 | |
---|
| 690 | G4double UII=0.0; |
---|
| 691 | G4double rkc=cutoff/ene; |
---|
| 692 | G4double dde; |
---|
| 693 | G4int kks; |
---|
| 694 | |
---|
| 695 | G4double sampledInteraction = (*typeOfInteraction)[is]; |
---|
| 696 | iOsc = (G4int) (*nbOfLevel)[is]; |
---|
| 697 | |
---|
| 698 | //Generates the final state according to the sampled level and |
---|
| 699 | //interaction channel |
---|
| 700 | |
---|
| 701 | if (sampledInteraction == 1.0) //Hard distant longitudinal collisions |
---|
| 702 | { |
---|
| 703 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 704 | kineticEnergy1=ene-dde; |
---|
| 705 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2))); |
---|
| 706 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2)); |
---|
| 707 | G4double qtrev = q*(q+2.0*electron_mass_c2); |
---|
| 708 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2); |
---|
| 709 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps)); |
---|
| 710 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0; |
---|
| 711 | //Energy and emission angle of the delta ray |
---|
| 712 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 713 | if (kks>4) |
---|
| 714 | { |
---|
| 715 | energySecondary=dde; |
---|
| 716 | } |
---|
| 717 | else |
---|
| 718 | { |
---|
| 719 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 720 | } |
---|
| 721 | cosThetaSecondary = 0.5*(dde*(ene+rb-dde)+qtrev)/std::sqrt(cps*qtrev); |
---|
| 722 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0; |
---|
| 723 | } |
---|
| 724 | |
---|
| 725 | else if (sampledInteraction == 2.0) //Hard distant transverse collisions |
---|
| 726 | { |
---|
| 727 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 728 | kineticEnergy1=ene-dde; |
---|
| 729 | cosThetaPrimary=1.0; |
---|
| 730 | //Energy and emission angle of the delta ray |
---|
| 731 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 732 | if (kks>4) |
---|
| 733 | { |
---|
| 734 | energySecondary=dde; |
---|
| 735 | } |
---|
| 736 | else |
---|
| 737 | { |
---|
| 738 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 739 | } |
---|
| 740 | cosThetaSecondary = 1.0; |
---|
| 741 | } |
---|
| 742 | |
---|
| 743 | else if (sampledInteraction == 3.0 || sampledInteraction == 4.0) //Close interaction |
---|
| 744 | { |
---|
| 745 | if (sampledInteraction == 4.0) //interaction with inner shells |
---|
| 746 | { |
---|
| 747 | UII=0.0; |
---|
| 748 | rkc = cutoff/ene; |
---|
| 749 | iOsc = -1; |
---|
| 750 | } |
---|
| 751 | else |
---|
| 752 | { |
---|
| 753 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 754 | if (kks > 4) { |
---|
| 755 | UII=0.0; |
---|
| 756 | } |
---|
| 757 | else |
---|
| 758 | { |
---|
| 759 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 760 | } |
---|
| 761 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/ene; |
---|
| 762 | } |
---|
| 763 | G4double A = 0.5*amol; |
---|
| 764 | G4double arkc = A*0.5*rkc; |
---|
| 765 | G4double phi,rk2,rk,rkf; |
---|
| 766 | do{ |
---|
| 767 | G4double fb = (1.0+arkc)*G4UniformRand(); |
---|
| 768 | if (fb<1.0) |
---|
| 769 | { |
---|
| 770 | rk=rkc/(1.0-fb*(1.0-(rkc*2.0))); |
---|
| 771 | } |
---|
| 772 | else{ |
---|
| 773 | rk = rkc+(fb-1.0)*(0.5-rkc)/arkc; |
---|
| 774 | } |
---|
| 775 | rk2 = rk*rk; |
---|
| 776 | rkf = rk/(1.0-rk); |
---|
| 777 | phi = 1.0+(rkf*rkf)-rkf+amol*(rk2+rkf); |
---|
| 778 | }while ((G4UniformRand()*(1.0+A*rk2)) > phi); |
---|
| 779 | //Energy and scattering angle (primary electron); |
---|
| 780 | kineticEnergy1 = ene*(1.0-rk); |
---|
| 781 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(ene*(rb-(rk*ene)))); |
---|
| 782 | //Energy and scattering angle of the delta ray |
---|
| 783 | energySecondary = ene-kineticEnergy1-UII; |
---|
| 784 | cosThetaSecondary = std::sqrt(rk*ene*rb/(ene*(rk*ene+2.0*electron_mass_c2))); |
---|
| 785 | } |
---|
| 786 | |
---|
| 787 | else |
---|
| 788 | |
---|
| 789 | { |
---|
| 790 | G4String excep = "G4PenelopeIonisation - Error in the calculation of the final state"; |
---|
| 791 | G4Exception(excep); |
---|
| 792 | } |
---|
| 793 | |
---|
| 794 | delete qm; |
---|
| 795 | delete cumulHardCS; |
---|
| 796 | delete typeOfInteraction; |
---|
| 797 | delete nbOfLevel; |
---|
| 798 | |
---|
| 799 | return; |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | void G4PenelopeIonisation::ReadData() |
---|
| 803 | { |
---|
| 804 | char* path = getenv("G4LEDATA"); |
---|
| 805 | if (!path) |
---|
| 806 | { |
---|
| 807 | G4String excep = "G4PenelopeIonisation - G4LEDATA environment variable not set!"; |
---|
| 808 | G4Exception(excep); |
---|
| 809 | } |
---|
| 810 | G4String pathString(path); |
---|
| 811 | G4String pathFile = pathString + "/penelope/ion-pen.dat"; |
---|
| 812 | std::ifstream file(pathFile); |
---|
| 813 | std::filebuf* lsdp = file.rdbuf(); |
---|
| 814 | |
---|
| 815 | if (!(lsdp->is_open())) |
---|
| 816 | { |
---|
| 817 | G4String excep = "G4PenelopeIonisation - data file " + pathFile + " not found!"; |
---|
| 818 | G4Exception(excep); |
---|
| 819 | } |
---|
| 820 | |
---|
| 821 | G4int k1,test,test1,k2,k3; |
---|
| 822 | G4double a1,a2,a3,a4; |
---|
| 823 | G4int Z=1,nLevels=0; |
---|
| 824 | G4DataVector* x1; |
---|
| 825 | G4DataVector* x2; |
---|
| 826 | G4DataVector* x3; |
---|
| 827 | G4DataVector* x4; |
---|
| 828 | |
---|
| 829 | do{ |
---|
| 830 | x1 = new G4DataVector; |
---|
| 831 | x2 = new G4DataVector; |
---|
| 832 | x3 = new G4DataVector; |
---|
| 833 | x4 = new G4DataVector; |
---|
| 834 | file >> Z >> nLevels; |
---|
| 835 | for (G4int h=0;h<nLevels;h++){ |
---|
| 836 | //index,occup number,ion energy,res energy,fj0,kz,shell flag |
---|
| 837 | file >> k1 >> a1 >> a2 >> a3 >> a4 >> k2 >> k3; |
---|
| 838 | x1->push_back(a1); |
---|
| 839 | x2->push_back(a2); |
---|
| 840 | x3->push_back(a3); |
---|
| 841 | x4->push_back((G4double) k3); |
---|
| 842 | } |
---|
| 843 | occupationNumber->insert(std::make_pair(Z,x1)); |
---|
| 844 | ionizationEnergy->insert(std::make_pair(Z,x2)); |
---|
| 845 | resonanceEnergy->insert(std::make_pair(Z,x3)); |
---|
| 846 | shellFlag->insert(std::make_pair(Z,x4)); |
---|
| 847 | file >> test >> test1; //-1 -1 close the data for each Z |
---|
| 848 | if (test > 0) { |
---|
| 849 | G4String excep = "G4PenelopeIonisation - data file corrupted!"; |
---|
| 850 | G4Exception(excep); |
---|
| 851 | } |
---|
| 852 | }while (test != -2); //the very last Z is closed with -2 instead of -1 |
---|
| 853 | } |
---|
| 854 | |
---|
| 855 | |
---|
| 856 | G4double G4PenelopeIonisation::CalculateDeltaFermi(G4double ene,G4int Z, |
---|
| 857 | G4double electronVolumeDensity) |
---|
| 858 | { |
---|
| 859 | G4double plasmaEnergyCoefficient = 1.377e-39; //(e*hbar)^2/(epsilon0*electron_mass) |
---|
| 860 | G4double plasmaEnergySquared = plasmaEnergyCoefficient*(electronVolumeDensity*m3); |
---|
| 861 | // std::sqrt(plasmaEnergySquared) is the plasma energy of the solid (MeV) |
---|
| 862 | G4double gam = 1.0+ene/electron_mass_c2; |
---|
| 863 | G4double gam2=gam*gam; |
---|
| 864 | G4double delta = 0.0; |
---|
| 865 | |
---|
| 866 | //Density effect |
---|
| 867 | G4double TST = ((G4double) Z)/(gam2*plasmaEnergySquared); |
---|
| 868 | |
---|
| 869 | G4double wl2 = 0.0; |
---|
| 870 | G4double fdel=0.0; |
---|
| 871 | G4double wr=0; |
---|
| 872 | G4double help1=0.0; |
---|
| 873 | size_t nbOsc = resonanceEnergy->find(Z)->second->size(); |
---|
| 874 | for(size_t i=0;i<nbOsc;i++) |
---|
| 875 | { |
---|
| 876 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
| 877 | wr = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 878 | fdel += occupNb/(wr*wr+wl2); |
---|
| 879 | } |
---|
| 880 | if (fdel < TST) return delta; |
---|
| 881 | help1 = (*(resonanceEnergy->find(Z)->second))[nbOsc-1]; |
---|
| 882 | wl2 = help1*help1; |
---|
| 883 | do{ |
---|
| 884 | wl2=wl2*2.0; |
---|
| 885 | fdel = 0.0; |
---|
| 886 | for (size_t ii=0;ii<nbOsc;ii++){ |
---|
| 887 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[ii]; |
---|
| 888 | wr = (*(resonanceEnergy->find(Z)->second))[ii]; |
---|
| 889 | fdel += occupNb/(wr*wr+wl2); |
---|
| 890 | } |
---|
| 891 | }while (fdel > TST); |
---|
| 892 | G4double wl2l=0.0; |
---|
| 893 | G4double wl2u = wl2; |
---|
| 894 | G4double control = 0.0; |
---|
| 895 | do{ |
---|
| 896 | wl2=0.5*(wl2l+wl2u); |
---|
| 897 | fdel = 0.0; |
---|
| 898 | for (size_t jj=0;jj<nbOsc;jj++){ |
---|
| 899 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[jj]; |
---|
| 900 | wr = (*(resonanceEnergy->find(Z)->second))[jj]; |
---|
| 901 | fdel += occupNb/(wr*wr+wl2); |
---|
| 902 | } |
---|
| 903 | if (fdel > TST) |
---|
| 904 | { |
---|
| 905 | wl2l = wl2; |
---|
| 906 | } |
---|
| 907 | else |
---|
| 908 | { |
---|
| 909 | wl2u = wl2; |
---|
| 910 | } |
---|
| 911 | control = wl2u-wl2l-wl2*1e-12; |
---|
| 912 | }while(control>0); |
---|
| 913 | |
---|
| 914 | //Density correction effect |
---|
| 915 | for (size_t kk=0;kk<nbOsc;kk++){ |
---|
| 916 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[kk]; |
---|
| 917 | wr = (*(resonanceEnergy->find(Z)->second))[kk]; |
---|
| 918 | delta += occupNb*std::log(1.0+wl2/(wr*wr)); |
---|
| 919 | } |
---|
| 920 | delta = (delta/((G4double) Z))-wl2/(gam2*plasmaEnergySquared); |
---|
| 921 | return delta; |
---|
| 922 | } |
---|
| 923 | |
---|
| 924 | G4double G4PenelopeIonisation::CalculateContinuous(G4double ene,G4double cutoff, |
---|
| 925 | G4int Z,G4double electronVolumeDensity, |
---|
| 926 | const G4ParticleDefinition& particle) |
---|
| 927 | { |
---|
| 928 | //Constants |
---|
| 929 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 930 | G4double gamma2 = gamma*gamma; |
---|
| 931 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 932 | G4double constant = pi*classic_electr_radius*classic_electr_radius |
---|
| 933 | *2.0*electron_mass_c2/beta2; |
---|
| 934 | |
---|
| 935 | |
---|
| 936 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
| 937 | G4int nbOsc = (G4int) resonanceEnergy->find(Z)->second->size(); |
---|
| 938 | G4double S1 = 0.0; |
---|
| 939 | G4double stoppingPower = 0.0; |
---|
| 940 | for (G4int i=0;i<nbOsc;i++){ |
---|
| 941 | G4double resEnergy = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 942 | if (&particle == G4Electron::Electron()) |
---|
| 943 | { |
---|
| 944 | S1 = CalculateStoppingPowerForElectrons(ene,resEnergy,delta,cutoff); |
---|
| 945 | } |
---|
| 946 | else if (&particle == G4Positron::Positron()) |
---|
| 947 | { |
---|
| 948 | S1 = CalculateStoppingPowerForPositrons(ene,resEnergy,delta,cutoff); |
---|
| 949 | } |
---|
| 950 | G4double occupNb = (*(occupationNumber->find(Z)->second))[i]; |
---|
| 951 | stoppingPower += occupNb*constant*S1; |
---|
| 952 | } |
---|
| 953 | |
---|
| 954 | return stoppingPower; |
---|
| 955 | } |
---|
| 956 | |
---|
| 957 | G4double G4PenelopeIonisation::CalculateStoppingPowerForElectrons(G4double ene,G4double resEne, |
---|
| 958 | G4double delta,G4double cutoff) |
---|
| 959 | { |
---|
| 960 | //Calculate constants |
---|
| 961 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 962 | G4double gamma2 = gamma*gamma; |
---|
| 963 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 964 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
| 965 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
| 966 | G4double sPower = 0.0; |
---|
| 967 | if (ene < resEne) return sPower; |
---|
| 968 | |
---|
| 969 | //Distant interactions |
---|
| 970 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
| 971 | G4double cp1 = std::sqrt(cp1s); |
---|
| 972 | G4double cp = std::sqrt(cps); |
---|
| 973 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 974 | |
---|
| 975 | //Distant longitudinal interactions |
---|
| 976 | G4double qm = 0.0; |
---|
| 977 | |
---|
| 978 | if (resEne > ene*(1e-6)) |
---|
| 979 | { |
---|
| 980 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 981 | } |
---|
| 982 | else |
---|
| 983 | { |
---|
| 984 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
| 985 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 986 | } |
---|
| 987 | |
---|
| 988 | if (qm < resEne) |
---|
| 989 | { |
---|
| 990 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
| 991 | } |
---|
| 992 | else |
---|
| 993 | { |
---|
| 994 | sdLong = 0.0; |
---|
| 995 | } |
---|
| 996 | |
---|
| 997 | if (sdLong > 0) { |
---|
| 998 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 999 | sdDist = sdTrans + sdLong; |
---|
| 1000 | if (cutoff > resEne) sPower = sdDist; |
---|
| 1001 | } |
---|
| 1002 | |
---|
| 1003 | |
---|
| 1004 | // Close collisions (Moeller's cross section) |
---|
| 1005 | G4double wl = std::max(cutoff,resEne); |
---|
| 1006 | G4double wu = 0.5*ene; |
---|
| 1007 | |
---|
| 1008 | if (wl < (wu-1*eV)) wu=wl; |
---|
| 1009 | wl = resEne; |
---|
| 1010 | if (wl > (wu-1*eV)) return sPower; |
---|
| 1011 | sPower += std::log(wu/wl)+(ene/(ene-wu))-(ene/(ene-wl)) |
---|
| 1012 | + (2.0 - amol)*std::log((ene-wu)/(ene-wl)) |
---|
| 1013 | + amol*((wu*wu)-(wl*wl))/(2.0*ene*ene); |
---|
| 1014 | |
---|
| 1015 | return sPower; |
---|
| 1016 | } |
---|
| 1017 | |
---|
| 1018 | G4double G4PenelopeIonisation::CalculateStoppingPowerForPositrons(G4double ene,G4double resEne, |
---|
| 1019 | G4double delta,G4double cutoff) |
---|
| 1020 | { |
---|
| 1021 | //Calculate constants |
---|
| 1022 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 1023 | G4double gamma2 = gamma*gamma; |
---|
| 1024 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1025 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
| 1026 | G4double amol = (ene/(ene+electron_mass_c2)) * (ene/(ene+electron_mass_c2)); |
---|
| 1027 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
| 1028 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
| 1029 | G4double bha2 = amol*(3.0+1.0/help); |
---|
| 1030 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
| 1031 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
| 1032 | |
---|
| 1033 | G4double sPower = 0.0; |
---|
| 1034 | if (ene < resEne) return sPower; |
---|
| 1035 | |
---|
| 1036 | //Distant interactions |
---|
| 1037 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
| 1038 | G4double cp1 = std::sqrt(cp1s); |
---|
| 1039 | G4double cp = std::sqrt(cps); |
---|
| 1040 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 1041 | |
---|
| 1042 | //Distant longitudinal interactions |
---|
| 1043 | G4double qm = 0.0; |
---|
| 1044 | |
---|
| 1045 | if (resEne > ene*(1e-6)) |
---|
| 1046 | { |
---|
| 1047 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 1048 | } |
---|
| 1049 | else |
---|
| 1050 | { |
---|
| 1051 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
| 1052 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 1053 | } |
---|
| 1054 | |
---|
| 1055 | if (qm < resEne) |
---|
| 1056 | { |
---|
| 1057 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
| 1058 | } |
---|
| 1059 | else |
---|
| 1060 | { |
---|
| 1061 | sdLong = 0.0; |
---|
| 1062 | } |
---|
| 1063 | |
---|
| 1064 | if (sdLong > 0) { |
---|
| 1065 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 1066 | sdDist = sdTrans + sdLong; |
---|
| 1067 | if (cutoff > resEne) sPower = sdDist; |
---|
| 1068 | } |
---|
| 1069 | |
---|
| 1070 | |
---|
| 1071 | // Close collisions (Bhabha's cross section) |
---|
| 1072 | G4double wl = std::max(cutoff,resEne); |
---|
| 1073 | G4double wu = ene; |
---|
| 1074 | |
---|
| 1075 | if (wl < (wu-1*eV)) wu=wl; |
---|
| 1076 | wl = resEne; |
---|
| 1077 | if (wl > (wu-1*eV)) return sPower; |
---|
| 1078 | sPower += std::log(wu/wl)-bha1*(wu-wl)/ene |
---|
| 1079 | + bha2*((wu*wu)-(wl*wl))/(2.0*ene*ene) |
---|
| 1080 | - bha3*((wu*wu*wu)-(wl*wl*wl))/(3.0*ene*ene*ene) |
---|
| 1081 | + bha4*((wu*wu*wu*wu)-(wl*wl*wl*wl))/(4.0*ene*ene*ene*ene); |
---|
| 1082 | |
---|
| 1083 | return sPower; |
---|
| 1084 | } |
---|
| 1085 | |
---|
| 1086 | void G4PenelopeIonisation::CalculateDiscreteForPositrons(G4double ene,G4double cutoff, |
---|
| 1087 | G4int Z,G4double electronVolumeDensity) |
---|
| 1088 | |
---|
| 1089 | { |
---|
| 1090 | kineticEnergy1=ene; |
---|
| 1091 | cosThetaPrimary=1.0; |
---|
| 1092 | energySecondary=0.0; |
---|
| 1093 | cosThetaSecondary=1.0; |
---|
| 1094 | iOsc=-1; |
---|
| 1095 | //constants |
---|
| 1096 | G4double rb=ene+2.0*electron_mass_c2; |
---|
| 1097 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 1098 | G4double gamma2 = gamma*gamma; |
---|
| 1099 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1100 | G4double amol = (gamma-1.0)*(gamma-1.0)/gamma2; |
---|
| 1101 | G4double cps = ene*rb; |
---|
| 1102 | G4double cp = std::sqrt(cps); |
---|
| 1103 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
| 1104 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
| 1105 | G4double bha2 = amol*(3.0+1.0/help); |
---|
| 1106 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
| 1107 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
| 1108 | |
---|
| 1109 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
| 1110 | G4double distantTransvCS0 = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 1111 | |
---|
| 1112 | G4double rl,rl1; |
---|
| 1113 | |
---|
| 1114 | if (cutoff > ene) return; //delta rays are not generated |
---|
| 1115 | |
---|
| 1116 | G4DataVector* qm = new G4DataVector(); |
---|
| 1117 | G4DataVector* cumulHardCS = new G4DataVector(); |
---|
| 1118 | G4DataVector* typeOfInteraction = new G4DataVector(); |
---|
| 1119 | G4DataVector* nbOfLevel = new G4DataVector(); |
---|
| 1120 | |
---|
| 1121 | |
---|
| 1122 | //Hard close collisions with outer shells |
---|
| 1123 | G4double wmaxc = ene; |
---|
| 1124 | G4double closeCS0 = 0.0; |
---|
| 1125 | G4double closeCS = 0.0; |
---|
| 1126 | if (cutoff>0.1*eV) |
---|
| 1127 | { |
---|
| 1128 | rl=cutoff/ene; |
---|
| 1129 | rl1=1.0-rl; |
---|
| 1130 | if (rl < 1.0) |
---|
| 1131 | closeCS0 = (((1.0/rl)-1.0) + bha1*std::log(rl) + bha2*rl1 |
---|
| 1132 | + (bha3/2.0)*((rl*rl)-1.0) |
---|
| 1133 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/ene; |
---|
| 1134 | } |
---|
| 1135 | |
---|
| 1136 | // Cross sections for the different oscillators |
---|
| 1137 | |
---|
| 1138 | // totalHardCS contains the cumulative hard interaction cross section for the different |
---|
| 1139 | // excitable levels and the different interaction channels (close, distant, etc.), |
---|
| 1140 | // i.e. |
---|
| 1141 | // cumulHardCS[0] = 0.0 |
---|
| 1142 | // cumulHardCS[1] = 1st excitable level (distant longitudinal only) |
---|
| 1143 | // cumulHardCS[2] = 1st excitable level (distant longitudinal + transverse) |
---|
| 1144 | // cumulHardCS[3] = 1st excitable level (distant longitudinal + transverse + close) |
---|
| 1145 | // cumulHardCS[4] = 1st excitable level (all channels) + 2nd excitable level (distant long only) |
---|
| 1146 | // etc. |
---|
| 1147 | // This is used for sampling the atomic level which is ionised and the channel of the |
---|
| 1148 | // interaction. |
---|
| 1149 | // |
---|
| 1150 | // For each index iFill of the cumulHardCS vector, |
---|
| 1151 | // nbOfLevel[iFill] contains the current excitable atomic level and |
---|
| 1152 | // typeOfInteraction[iFill] contains the current interaction channel, with the legenda: |
---|
| 1153 | // 1 = distant longitudinal interaction |
---|
| 1154 | // 2 = distant transverse interaction |
---|
| 1155 | // 3 = close collision |
---|
| 1156 | // 4 = close collision with outer shells (in this case nbOfLevel < 0 --> no binding energy) |
---|
| 1157 | |
---|
| 1158 | |
---|
| 1159 | G4int nOscil = ionizationEnergy->find(Z)->second->size(); |
---|
| 1160 | G4double totalHardCS = 0.0; |
---|
| 1161 | G4double involvedElectrons = 0.0; |
---|
| 1162 | for (G4int i=0;i<nOscil;i++){ |
---|
| 1163 | G4double wi = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 1164 | G4int occupNb = (G4int) (*(occupationNumber->find(Z)->second))[i]; |
---|
| 1165 | //Distant excitations |
---|
| 1166 | if (wi>cutoff && wi<ene) |
---|
| 1167 | { |
---|
| 1168 | if (wi>(1e-6*ene)){ |
---|
| 1169 | G4double cpp=std::sqrt((ene-wi)*(ene-wi+2.0*electron_mass_c2)); |
---|
| 1170 | qm->push_back(std::sqrt((cp-cpp)*(cp-cpp)+ electron_mass_c2 * electron_mass_c2)-electron_mass_c2); |
---|
| 1171 | } |
---|
| 1172 | else |
---|
| 1173 | { |
---|
| 1174 | qm->push_back(wi*wi/(beta2+2.0*electron_mass_c2)); |
---|
| 1175 | } |
---|
| 1176 | //verificare che quando arriva qui il vettore ha SEMPRE l'i-esimo elemento |
---|
| 1177 | if ((*qm)[i] < wi) |
---|
| 1178 | { |
---|
| 1179 | |
---|
| 1180 | G4double distantLongitCS = occupNb*std::log(wi*((*qm)[i]+2.0*electron_mass_c2)/ |
---|
| 1181 | ((*qm)[i]*(wi+2.0*electron_mass_c2)))/wi; |
---|
| 1182 | cumulHardCS->push_back(totalHardCS); |
---|
| 1183 | typeOfInteraction->push_back(1.0); //distant longitudinal |
---|
| 1184 | nbOfLevel->push_back((G4double) i); //only excitable level are counted |
---|
| 1185 | totalHardCS += distantLongitCS; |
---|
| 1186 | |
---|
| 1187 | G4double distantTransvCS = occupNb*distantTransvCS0/wi; |
---|
| 1188 | |
---|
| 1189 | cumulHardCS->push_back(totalHardCS); |
---|
| 1190 | typeOfInteraction->push_back(2.0); //distant tranverse |
---|
| 1191 | nbOfLevel->push_back((G4double) i); |
---|
| 1192 | totalHardCS += distantTransvCS; |
---|
| 1193 | } |
---|
| 1194 | } |
---|
| 1195 | else |
---|
| 1196 | { |
---|
| 1197 | qm->push_back(wi); |
---|
| 1198 | } |
---|
| 1199 | //close collisions |
---|
| 1200 | if(wi < wmaxc){ |
---|
| 1201 | if (wi < cutoff) { |
---|
| 1202 | involvedElectrons += occupNb; |
---|
| 1203 | } |
---|
| 1204 | else |
---|
| 1205 | { |
---|
| 1206 | rl=wi/ene; |
---|
| 1207 | rl1=1.0-rl; |
---|
| 1208 | closeCS = occupNb*(((1.0/rl)-1.0)+bha1*std::log(rl)+bha2*rl1 |
---|
| 1209 | + (bha3/2.0)*((rl*rl)-1.0) |
---|
| 1210 | + (bha4/3.0)*(1.0-(rl*rl*rl)))/ene; |
---|
| 1211 | cumulHardCS->push_back(totalHardCS); |
---|
| 1212 | typeOfInteraction->push_back(3.0); //close |
---|
| 1213 | nbOfLevel->push_back((G4double) i); |
---|
| 1214 | totalHardCS += closeCS; |
---|
| 1215 | } |
---|
| 1216 | } |
---|
| 1217 | } // loop on the levels |
---|
| 1218 | |
---|
| 1219 | cumulHardCS->push_back(totalHardCS); |
---|
| 1220 | typeOfInteraction->push_back(4.0); //close interaction with outer shells |
---|
| 1221 | nbOfLevel->push_back(-1.0); |
---|
| 1222 | totalHardCS += involvedElectrons*closeCS0; |
---|
| 1223 | cumulHardCS->push_back(totalHardCS); //this is the final value of the totalHardCS |
---|
| 1224 | |
---|
| 1225 | if (totalHardCS < 1e-30) { |
---|
| 1226 | kineticEnergy1=ene; |
---|
| 1227 | cosThetaPrimary=1.0; |
---|
| 1228 | energySecondary=0.0; |
---|
| 1229 | cosThetaSecondary=0.0; |
---|
| 1230 | iOsc=-1; |
---|
| 1231 | delete qm; |
---|
| 1232 | delete cumulHardCS; |
---|
| 1233 | delete typeOfInteraction; |
---|
| 1234 | delete nbOfLevel; |
---|
| 1235 | return; |
---|
| 1236 | } |
---|
| 1237 | |
---|
| 1238 | |
---|
| 1239 | //Selection of the active oscillator on the basis of the cumulative cross sections |
---|
| 1240 | G4double TST = totalHardCS*G4UniformRand(); |
---|
| 1241 | G4int is=0; |
---|
| 1242 | G4int js= nbOfLevel->size(); |
---|
| 1243 | do{ |
---|
| 1244 | G4int it=(is+js)/2; |
---|
| 1245 | if (TST > (*cumulHardCS)[it]) is=it; |
---|
| 1246 | if (TST <= (*cumulHardCS)[it]) js=it; |
---|
| 1247 | }while((js-is) > 1); |
---|
| 1248 | |
---|
| 1249 | G4double UII=0.0; |
---|
| 1250 | G4double rkc=cutoff/ene; |
---|
| 1251 | G4double dde; |
---|
| 1252 | G4int kks; |
---|
| 1253 | |
---|
| 1254 | G4double sampledInteraction = (*typeOfInteraction)[is]; |
---|
| 1255 | iOsc = (G4int) (*nbOfLevel)[is]; |
---|
| 1256 | |
---|
| 1257 | //Generates the final state according to the sampled level and |
---|
| 1258 | //interaction channel |
---|
| 1259 | |
---|
| 1260 | if (sampledInteraction == 1.0) //Hard distant longitudinal collisions |
---|
| 1261 | { |
---|
| 1262 | dde= (*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 1263 | kineticEnergy1=ene-dde; |
---|
| 1264 | G4double qs=(*qm)[iOsc]/(1.0+((*qm)[iOsc]/(2.0*electron_mass_c2))); |
---|
| 1265 | G4double q=qs/(std::pow((qs/dde)*(1.0+(0.5*dde/electron_mass_c2)),G4UniformRand())-(0.5*qs/electron_mass_c2)); |
---|
| 1266 | G4double qtrev = q*(q+2.0*electron_mass_c2); |
---|
| 1267 | G4double cpps = kineticEnergy1*(kineticEnergy1+2.0*electron_mass_c2); |
---|
| 1268 | cosThetaPrimary = (cpps+cps-qtrev)/(2.0*cp*std::sqrt(cpps)); |
---|
| 1269 | if (cosThetaPrimary>1.0) cosThetaPrimary=1.0; |
---|
| 1270 | //Energy and emission angle of the delta ray |
---|
| 1271 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 1272 | if (kks>4) |
---|
| 1273 | { |
---|
| 1274 | energySecondary=dde; |
---|
| 1275 | } |
---|
| 1276 | else |
---|
| 1277 | { |
---|
| 1278 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 1279 | } |
---|
| 1280 | cosThetaSecondary = 0.5*(dde*(ene+rb-dde)+qtrev)/std::sqrt(cps*qtrev); |
---|
| 1281 | if (cosThetaSecondary>1.0) cosThetaSecondary=1.0; |
---|
| 1282 | } |
---|
| 1283 | |
---|
| 1284 | else if (sampledInteraction == 2.0) //Hard distant transverse collisions |
---|
| 1285 | { |
---|
| 1286 | dde=(*(resonanceEnergy->find(Z)->second))[iOsc]; |
---|
| 1287 | kineticEnergy1=ene-dde; |
---|
| 1288 | cosThetaPrimary=1.0; |
---|
| 1289 | //Energy and emission angle of the delta ray |
---|
| 1290 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 1291 | if (kks>4) |
---|
| 1292 | { |
---|
| 1293 | energySecondary=dde; |
---|
| 1294 | } |
---|
| 1295 | else |
---|
| 1296 | { |
---|
| 1297 | energySecondary=dde-(*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 1298 | } |
---|
| 1299 | cosThetaSecondary = 1.0; |
---|
| 1300 | } |
---|
| 1301 | |
---|
| 1302 | else if (sampledInteraction == 3.0 || sampledInteraction == 4.0) //Close interaction |
---|
| 1303 | { |
---|
| 1304 | if (sampledInteraction == 4.0) //interaction with inner shells |
---|
| 1305 | { |
---|
| 1306 | UII=0.0; |
---|
| 1307 | rkc = cutoff/ene; |
---|
| 1308 | iOsc = -1; |
---|
| 1309 | } |
---|
| 1310 | else |
---|
| 1311 | { |
---|
| 1312 | kks = (G4int) (*(shellFlag->find(Z)->second))[iOsc]; |
---|
| 1313 | if (kks > 4) { |
---|
| 1314 | UII=0.0; |
---|
| 1315 | } |
---|
| 1316 | else |
---|
| 1317 | { |
---|
| 1318 | UII = (*(ionizationEnergy->find(Z)->second))[iOsc]; |
---|
| 1319 | } |
---|
| 1320 | rkc = (*(resonanceEnergy->find(Z)->second))[iOsc]/ene; |
---|
| 1321 | } |
---|
| 1322 | G4double phi,rk; |
---|
| 1323 | do{ |
---|
| 1324 | rk=rkc/(1.0-G4UniformRand()*(1.0-rkc)); |
---|
| 1325 | phi = 1.0-rk*(bha1-rk*(bha2-rk*(bha3-bha4*rk))); |
---|
| 1326 | }while ( G4UniformRand() > phi); |
---|
| 1327 | //Energy and scattering angle (primary electron); |
---|
| 1328 | kineticEnergy1 = ene*(1.0-rk); |
---|
| 1329 | cosThetaPrimary = std::sqrt(kineticEnergy1*rb/(ene*(rb-(rk*ene)))); |
---|
| 1330 | //Energy and scattering angle of the delta ray |
---|
| 1331 | energySecondary = ene-kineticEnergy1-UII; |
---|
| 1332 | cosThetaSecondary = std::sqrt(rk*ene*rb/(ene*(rk*ene+2.0*electron_mass_c2))); |
---|
| 1333 | } |
---|
| 1334 | else |
---|
| 1335 | { |
---|
| 1336 | G4String excep = "G4PenelopeIonisation - Error in the calculation of the final state"; |
---|
| 1337 | G4Exception(excep); |
---|
| 1338 | } |
---|
| 1339 | |
---|
| 1340 | delete qm; |
---|
| 1341 | delete cumulHardCS; |
---|
| 1342 | delete typeOfInteraction; |
---|
| 1343 | delete nbOfLevel; |
---|
| 1344 | |
---|
| 1345 | return; |
---|
| 1346 | } |
---|
| 1347 | |
---|
| 1348 | // This stuff in needed in order to interface with the Cross Section Handler |
---|
| 1349 | |
---|
| 1350 | G4double G4PenelopeIonisation::CalculateCrossSectionsRatio(G4double ene,G4double cutoff, |
---|
| 1351 | G4int Z,G4double electronVolumeDensity, |
---|
| 1352 | const G4ParticleDefinition& particle) |
---|
| 1353 | { |
---|
| 1354 | //Constants |
---|
| 1355 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 1356 | G4double gamma2 = gamma*gamma; |
---|
| 1357 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1358 | G4double constant = pi*classic_electr_radius*classic_electr_radius*2.0*electron_mass_c2/beta2; |
---|
| 1359 | G4double delta = CalculateDeltaFermi(ene,Z,electronVolumeDensity); |
---|
| 1360 | G4int nbOsc = (G4int) resonanceEnergy->find(Z)->second->size(); |
---|
| 1361 | G4double S0 = 0.0, H0=0.0; |
---|
| 1362 | G4double softCS = 0.0; |
---|
| 1363 | G4double hardCS = 0.0; |
---|
| 1364 | for (G4int i=0;i<nbOsc;i++){ |
---|
| 1365 | G4double resEnergy = (*(resonanceEnergy->find(Z)->second))[i]; |
---|
| 1366 | if (&particle == G4Electron::Electron()) |
---|
| 1367 | { |
---|
| 1368 | S0 = CrossSectionsRatioForElectrons(ene,resEnergy,delta,cutoff,1); |
---|
| 1369 | H0 = CrossSectionsRatioForElectrons(ene,resEnergy,delta,cutoff,2); |
---|
| 1370 | } |
---|
| 1371 | else if (&particle == G4Positron::Positron()) |
---|
| 1372 | { |
---|
| 1373 | S0 = CrossSectionsRatioForPositrons(ene,resEnergy,delta,cutoff,1); |
---|
| 1374 | H0 = CrossSectionsRatioForPositrons(ene,resEnergy,delta,cutoff,2); |
---|
| 1375 | } |
---|
| 1376 | G4double occupNb = (*(occupationNumber->find(Z)->second))[i]; |
---|
| 1377 | softCS += occupNb*constant*S0; |
---|
| 1378 | hardCS += occupNb*constant*H0; |
---|
| 1379 | } |
---|
| 1380 | G4double ratio = 0.0; |
---|
| 1381 | if (softCS+hardCS) ratio = (hardCS)/(softCS+hardCS); |
---|
| 1382 | return ratio; |
---|
| 1383 | } |
---|
| 1384 | |
---|
| 1385 | |
---|
| 1386 | G4double G4PenelopeIonisation::CrossSectionsRatioForElectrons(G4double ene,G4double resEne, |
---|
| 1387 | G4double delta,G4double cutoff, |
---|
| 1388 | G4int index) |
---|
| 1389 | { |
---|
| 1390 | //Calculate constants |
---|
| 1391 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 1392 | G4double gamma2 = gamma*gamma; |
---|
| 1393 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1394 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
| 1395 | G4double amol = (ene/(ene+electron_mass_c2)) * (ene/(ene+electron_mass_c2)) ; |
---|
| 1396 | G4double hardCont = 0.0; |
---|
| 1397 | G4double softCont = 0.0; |
---|
| 1398 | if (ene < resEne) return 0.0; |
---|
| 1399 | |
---|
| 1400 | //Distant interactions |
---|
| 1401 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
| 1402 | G4double cp1 = std::sqrt(cp1s); |
---|
| 1403 | G4double cp = std::sqrt(cps); |
---|
| 1404 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 1405 | |
---|
| 1406 | //Distant longitudinal interactions |
---|
| 1407 | G4double qm = 0.0; |
---|
| 1408 | |
---|
| 1409 | if (resEne > ene*(1e-6)) |
---|
| 1410 | { |
---|
| 1411 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 1412 | } |
---|
| 1413 | else |
---|
| 1414 | { |
---|
| 1415 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
| 1416 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 1417 | } |
---|
| 1418 | |
---|
| 1419 | if (qm < resEne) |
---|
| 1420 | { |
---|
| 1421 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
| 1422 | } |
---|
| 1423 | else |
---|
| 1424 | { |
---|
| 1425 | sdLong = 0.0; |
---|
| 1426 | } |
---|
| 1427 | |
---|
| 1428 | if (sdLong > 0) { |
---|
| 1429 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 1430 | sdDist = sdTrans + sdLong; |
---|
| 1431 | if (cutoff > resEne) |
---|
| 1432 | { |
---|
| 1433 | softCont = sdDist/resEne; |
---|
| 1434 | } |
---|
| 1435 | else |
---|
| 1436 | { |
---|
| 1437 | hardCont = sdDist/resEne; |
---|
| 1438 | } |
---|
| 1439 | } |
---|
| 1440 | |
---|
| 1441 | |
---|
| 1442 | // Close collisions (Moeller's cross section) |
---|
| 1443 | G4double wl = std::max(cutoff,resEne); |
---|
| 1444 | G4double wu = 0.5*ene; |
---|
| 1445 | |
---|
| 1446 | if (wl < (wu-1*eV)) |
---|
| 1447 | { |
---|
| 1448 | hardCont += (1.0/(ene-wu))-(1.0/(ene-wl)) |
---|
| 1449 | - (1.0/wu)+(1.0/wl) |
---|
| 1450 | + (1.0-amol)*std::log(((ene-wu)*wl)/((ene-wl)*wu))/ene |
---|
| 1451 | + amol*(wu-wl)/(ene*ene); |
---|
| 1452 | wu=wl; |
---|
| 1453 | } |
---|
| 1454 | |
---|
| 1455 | wl = resEne; |
---|
| 1456 | if (wl > (wu-1*eV)) { |
---|
| 1457 | if (index == 1) return softCont; |
---|
| 1458 | if (index == 2) return hardCont; |
---|
| 1459 | } |
---|
| 1460 | softCont += (1.0/(ene-wu))-(1.0/(ene-wl)) |
---|
| 1461 | - (1.0/wu)+(1.0/wl) |
---|
| 1462 | + (1.0-amol)*std::log(((ene-wu)*wl)/((ene-wl)*wu))/ene |
---|
| 1463 | + amol*(wu-wl)/(ene*ene); |
---|
| 1464 | if (index == 1) return softCont; |
---|
| 1465 | return hardCont; |
---|
| 1466 | } |
---|
| 1467 | |
---|
| 1468 | G4double G4PenelopeIonisation::CrossSectionsRatioForPositrons(G4double ene,G4double resEne, |
---|
| 1469 | G4double delta,G4double cutoff,G4int index) |
---|
| 1470 | { |
---|
| 1471 | //Calculate constants |
---|
| 1472 | G4double gamma = 1.0+ene/electron_mass_c2; |
---|
| 1473 | G4double gamma2 = gamma*gamma; |
---|
| 1474 | G4double beta2 = (gamma2-1.0)/gamma2; |
---|
| 1475 | G4double cps = ene*(ene+2.0*electron_mass_c2); |
---|
| 1476 | G4double amol = (ene/(ene+electron_mass_c2)) * (ene/(ene+electron_mass_c2)) ; |
---|
| 1477 | G4double help = (gamma+1.0)*(gamma+1.0); |
---|
| 1478 | G4double bha1 = amol*(2.0*help-1.0)/(gamma2-1.0); |
---|
| 1479 | G4double bha2 = amol*(3.0+1.0/help); |
---|
| 1480 | G4double bha3 = amol*2.0*gamma*(gamma-1.0)/help; |
---|
| 1481 | G4double bha4 = amol*(gamma-1.0)*(gamma-1.0)/help; |
---|
| 1482 | G4double hardCont = 0.0; |
---|
| 1483 | G4double softCont = 0.0; |
---|
| 1484 | if (ene < resEne) return 0.0; |
---|
| 1485 | |
---|
| 1486 | |
---|
| 1487 | //Distant interactions |
---|
| 1488 | G4double cp1s = (ene-resEne)*(ene-resEne+2.0*electron_mass_c2); |
---|
| 1489 | G4double cp1 = std::sqrt(cp1s); |
---|
| 1490 | G4double cp = std::sqrt(cps); |
---|
| 1491 | G4double sdLong=0.0, sdTrans = 0.0, sdDist=0.0; |
---|
| 1492 | |
---|
| 1493 | //Distant longitudinal interactions |
---|
| 1494 | G4double qm = 0.0; |
---|
| 1495 | |
---|
| 1496 | if (resEne > ene*(1e-6)) |
---|
| 1497 | { |
---|
| 1498 | qm = std::sqrt((cp-cp1)*(cp-cp1)+(electron_mass_c2*electron_mass_c2))-electron_mass_c2; |
---|
| 1499 | } |
---|
| 1500 | else |
---|
| 1501 | { |
---|
| 1502 | qm = resEne*resEne/(beta2*2.0*electron_mass_c2); |
---|
| 1503 | qm = qm*(1.0-0.5*qm/electron_mass_c2); |
---|
| 1504 | } |
---|
| 1505 | |
---|
| 1506 | if (qm < resEne) |
---|
| 1507 | { |
---|
| 1508 | sdLong = std::log(resEne*(qm+2.0*electron_mass_c2)/(qm*(resEne+2.0*electron_mass_c2))); |
---|
| 1509 | } |
---|
| 1510 | else |
---|
| 1511 | { |
---|
| 1512 | sdLong = 0.0; |
---|
| 1513 | } |
---|
| 1514 | |
---|
| 1515 | if (sdLong > 0) { |
---|
| 1516 | sdTrans = std::max(std::log(gamma2)-beta2-delta,0.0); |
---|
| 1517 | sdDist = sdTrans + sdLong; |
---|
| 1518 | if (cutoff > resEne) |
---|
| 1519 | { |
---|
| 1520 | softCont = sdDist/resEne; |
---|
| 1521 | } |
---|
| 1522 | else |
---|
| 1523 | { |
---|
| 1524 | hardCont = sdDist/resEne; |
---|
| 1525 | } |
---|
| 1526 | } |
---|
| 1527 | |
---|
| 1528 | |
---|
| 1529 | // Close collisions (Bhabha's cross section) |
---|
| 1530 | G4double wl = std::max(cutoff,resEne); |
---|
| 1531 | G4double wu = ene; |
---|
| 1532 | |
---|
| 1533 | if (wl < (wu-1*eV)) { |
---|
| 1534 | hardCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/ene |
---|
| 1535 | + bha2*(wu-wl)/(ene*ene) -bha3*((wu*wu)-(wl*wl))/(2.0*ene*ene*ene) |
---|
| 1536 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*ene*ene*ene*ene); |
---|
| 1537 | wu=wl; |
---|
| 1538 | } |
---|
| 1539 | wl = resEne; |
---|
| 1540 | if (wl > (wu-1*eV)) |
---|
| 1541 | { |
---|
| 1542 | if (index == 1) return softCont; |
---|
| 1543 | if (index == 2) return hardCont; |
---|
| 1544 | } |
---|
| 1545 | softCont += (1.0/wl)-(1.0/wu)-bha1*std::log(wu/wl)/ene |
---|
| 1546 | + bha2*(wu-wl)/(ene*ene) -bha3*((wu*wu)-(wl*wl))/(2.0*ene*ene*ene) |
---|
| 1547 | + bha4*((wu*wu*wu)-(wl*wl*wl))/(3.0*ene*ene*ene*ene); |
---|
| 1548 | |
---|
| 1549 | if (index == 1) return softCont; |
---|
| 1550 | return hardCont; |
---|
| 1551 | } |
---|