[1192] | 1 | // |
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[1058] | 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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[1340] | 26 | // $Id: G4DNABornIonisationModel.cc,v 1.18 2010/11/03 12:22:36 sincerti Exp $ |
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[1347] | 27 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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[1058] | 28 | // |
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| 29 | |
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| 30 | #include "G4DNABornIonisationModel.hh" |
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[1192] | 31 | //#include "G4DynamicMolecule.hh" |
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[1058] | 32 | |
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| 33 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 34 | |
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| 35 | using namespace std; |
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| 36 | |
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| 37 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 38 | |
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| 39 | G4DNABornIonisationModel::G4DNABornIonisationModel(const G4ParticleDefinition*, |
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| 40 | const G4String& nam) |
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| 41 | :G4VEmModel(nam),isInitialised(false) |
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| 42 | { |
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| 43 | verboseLevel= 0; |
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| 44 | // Verbosity scale: |
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| 45 | // 0 = nothing |
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| 46 | // 1 = warning for energy non-conservation |
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| 47 | // 2 = details of energy budget |
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| 48 | // 3 = calculation of cross sections, file openings, sampling of atoms |
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| 49 | // 4 = entering in methods |
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| 50 | |
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[1192] | 51 | if( verboseLevel>0 ) |
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| 52 | { |
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| 53 | G4cout << "Born ionisation model is constructed " << G4endl; |
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| 54 | } |
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[1058] | 55 | } |
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| 56 | |
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| 57 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 58 | |
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| 59 | G4DNABornIonisationModel::~G4DNABornIonisationModel() |
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| 60 | { |
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| 61 | // Cross section |
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| 62 | |
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| 63 | std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos; |
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| 64 | for (pos = tableData.begin(); pos != tableData.end(); ++pos) |
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| 65 | { |
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| 66 | G4DNACrossSectionDataSet* table = pos->second; |
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| 67 | delete table; |
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| 68 | } |
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| 69 | |
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| 70 | // Final state |
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| 71 | |
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| 72 | eVecm.clear(); |
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| 73 | pVecm.clear(); |
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| 74 | |
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| 75 | } |
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| 76 | |
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| 77 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 78 | |
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| 79 | void G4DNABornIonisationModel::Initialise(const G4ParticleDefinition* particle, |
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| 80 | const G4DataVector& /*cuts*/) |
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| 81 | { |
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| 82 | |
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| 83 | if (verboseLevel > 3) |
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| 84 | G4cout << "Calling G4DNABornIonisationModel::Initialise()" << G4endl; |
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| 85 | |
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| 86 | // Energy limits |
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| 87 | |
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| 88 | G4String fileElectron("dna/sigma_ionisation_e_born"); |
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| 89 | G4String fileProton("dna/sigma_ionisation_p_born"); |
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| 90 | |
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| 91 | G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition(); |
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| 92 | G4ParticleDefinition* protonDef = G4Proton::ProtonDefinition(); |
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| 93 | |
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| 94 | G4String electron; |
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| 95 | G4String proton; |
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| 96 | |
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| 97 | G4double scaleFactor = (1.e-22 / 3.343) * m*m; |
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| 98 | |
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| 99 | char *path = getenv("G4LEDATA"); |
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| 100 | |
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| 101 | if (electronDef != 0) |
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| 102 | { |
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| 103 | electron = electronDef->GetParticleName(); |
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| 104 | |
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| 105 | tableFile[electron] = fileElectron; |
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| 106 | |
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[1192] | 107 | lowEnergyLimit[electron] = 11. * eV; |
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| 108 | highEnergyLimit[electron] = 1. * MeV; |
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[1058] | 109 | |
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| 110 | // Cross section |
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| 111 | |
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| 112 | G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor ); |
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| 113 | tableE->LoadData(fileElectron); |
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| 114 | |
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| 115 | tableData[electron] = tableE; |
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| 116 | |
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| 117 | // Final state |
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| 118 | |
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| 119 | std::ostringstream eFullFileName; |
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| 120 | eFullFileName << path << "/dna/sigmadiff_ionisation_e_born.dat"; |
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| 121 | std::ifstream eDiffCrossSection(eFullFileName.str().c_str()); |
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| 122 | |
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| 123 | if (!eDiffCrossSection) |
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| 124 | { |
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| 125 | G4Exception("G4DNABornIonisationModel::ERROR OPENING electron DATA FILE"); |
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| 126 | } |
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| 127 | |
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| 128 | eTdummyVec.push_back(0.); |
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| 129 | while(!eDiffCrossSection.eof()) |
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| 130 | { |
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| 131 | double tDummy; |
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| 132 | double eDummy; |
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| 133 | eDiffCrossSection>>tDummy>>eDummy; |
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| 134 | if (tDummy != eTdummyVec.back()) eTdummyVec.push_back(tDummy); |
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| 135 | for (int j=0; j<5; j++) |
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| 136 | { |
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| 137 | eDiffCrossSection>>eDiffCrossSectionData[j][tDummy][eDummy]; |
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| 138 | |
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| 139 | // SI - only if eof is not reached ! |
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| 140 | if (!eDiffCrossSection.eof()) eDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor; |
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| 141 | |
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| 142 | eVecm[tDummy].push_back(eDummy); |
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| 143 | |
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| 144 | } |
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| 145 | } |
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| 146 | |
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| 147 | // |
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| 148 | } |
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| 149 | else |
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| 150 | { |
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| 151 | G4Exception("G4DNABornIonisationModel::Initialise(): electron is not defined"); |
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| 152 | } |
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| 153 | |
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| 154 | if (protonDef != 0) |
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| 155 | { |
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| 156 | proton = protonDef->GetParticleName(); |
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| 157 | |
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| 158 | tableFile[proton] = fileProton; |
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| 159 | |
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| 160 | lowEnergyLimit[proton] = 500. * keV; |
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[1192] | 161 | highEnergyLimit[proton] = 100. * MeV; |
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[1058] | 162 | |
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| 163 | // Cross section |
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| 164 | |
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| 165 | G4DNACrossSectionDataSet* tableP = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor ); |
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| 166 | tableP->LoadData(fileProton); |
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| 167 | |
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| 168 | tableData[proton] = tableP; |
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| 169 | |
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| 170 | // Final state |
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| 171 | |
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| 172 | std::ostringstream pFullFileName; |
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| 173 | pFullFileName << path << "/dna/sigmadiff_ionisation_p_born.dat"; |
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| 174 | std::ifstream pDiffCrossSection(pFullFileName.str().c_str()); |
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| 175 | |
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| 176 | if (!pDiffCrossSection) |
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| 177 | { |
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| 178 | G4Exception("G4DNABornIonisationModel::ERROR OPENING proton DATA FILE"); |
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| 179 | } |
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| 180 | |
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| 181 | pTdummyVec.push_back(0.); |
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| 182 | while(!pDiffCrossSection.eof()) |
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| 183 | { |
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| 184 | double tDummy; |
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| 185 | double eDummy; |
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| 186 | pDiffCrossSection>>tDummy>>eDummy; |
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| 187 | if (tDummy != pTdummyVec.back()) pTdummyVec.push_back(tDummy); |
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| 188 | for (int j=0; j<5; j++) |
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| 189 | { |
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| 190 | pDiffCrossSection>>pDiffCrossSectionData[j][tDummy][eDummy]; |
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| 191 | |
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| 192 | // SI - only if eof is not reached ! |
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| 193 | if (!pDiffCrossSection.eof()) pDiffCrossSectionData[j][tDummy][eDummy]*=scaleFactor; |
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| 194 | |
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| 195 | pVecm[tDummy].push_back(eDummy); |
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| 196 | } |
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| 197 | } |
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| 198 | |
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| 199 | } |
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| 200 | else |
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| 201 | { |
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| 202 | G4Exception("G4DNABornIonisationModel::Initialise(): proton is not defined"); |
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| 203 | } |
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| 204 | |
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| 205 | if (particle==electronDef) |
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| 206 | { |
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| 207 | SetLowEnergyLimit(lowEnergyLimit[electron]); |
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| 208 | SetHighEnergyLimit(highEnergyLimit[electron]); |
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| 209 | } |
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| 210 | |
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| 211 | if (particle==protonDef) |
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| 212 | { |
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| 213 | SetLowEnergyLimit(lowEnergyLimit[proton]); |
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| 214 | SetHighEnergyLimit(highEnergyLimit[proton]); |
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| 215 | } |
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| 216 | |
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[1192] | 217 | if( verboseLevel>0 ) |
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| 218 | { |
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| 219 | G4cout << "Born ionisation model is initialized " << G4endl |
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| 220 | << "Energy range: " |
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| 221 | << LowEnergyLimit() / eV << " eV - " |
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| 222 | << HighEnergyLimit() / keV << " keV for " |
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| 223 | << particle->GetParticleName() |
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| 224 | << G4endl; |
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| 225 | } |
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| 226 | |
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[1058] | 227 | // |
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| 228 | |
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| 229 | if(!isInitialised) |
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| 230 | { |
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| 231 | isInitialised = true; |
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| 232 | |
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| 233 | if(pParticleChange) |
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| 234 | fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange); |
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| 235 | else |
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| 236 | fParticleChangeForGamma = new G4ParticleChangeForGamma(); |
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| 237 | } |
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| 238 | |
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| 239 | // InitialiseElementSelectors(particle,cuts); |
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| 240 | |
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| 241 | } |
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| 242 | |
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| 243 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 244 | |
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[1315] | 245 | G4double G4DNABornIonisationModel::CrossSectionPerVolume(const G4Material* material, |
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[1058] | 246 | const G4ParticleDefinition* particleDefinition, |
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| 247 | G4double ekin, |
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| 248 | G4double, |
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| 249 | G4double) |
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| 250 | { |
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| 251 | if (verboseLevel > 3) |
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| 252 | G4cout << "Calling CrossSectionPerVolume() of G4DNABornIonisationModel" << G4endl; |
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| 253 | |
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| 254 | if ( |
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| 255 | particleDefinition != G4Proton::ProtonDefinition() |
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| 256 | && |
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| 257 | particleDefinition != G4Electron::ElectronDefinition() |
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| 258 | ) |
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| 259 | |
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| 260 | return 0; |
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| 261 | |
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| 262 | // Calculate total cross section for model |
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| 263 | |
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| 264 | G4double lowLim = 0; |
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| 265 | G4double highLim = 0; |
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| 266 | G4double sigma=0; |
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| 267 | |
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[1315] | 268 | if (material->GetName() == "G4_WATER") |
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[1058] | 269 | { |
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| 270 | const G4String& particleName = particleDefinition->GetParticleName(); |
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| 271 | |
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| 272 | std::map< G4String,G4double,std::less<G4String> >::iterator pos1; |
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| 273 | pos1 = lowEnergyLimit.find(particleName); |
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| 274 | if (pos1 != lowEnergyLimit.end()) |
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| 275 | { |
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| 276 | lowLim = pos1->second; |
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| 277 | } |
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| 278 | |
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| 279 | std::map< G4String,G4double,std::less<G4String> >::iterator pos2; |
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| 280 | pos2 = highEnergyLimit.find(particleName); |
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| 281 | if (pos2 != highEnergyLimit.end()) |
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| 282 | { |
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| 283 | highLim = pos2->second; |
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| 284 | } |
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| 285 | |
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| 286 | if (ekin >= lowLim && ekin < highLim) |
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| 287 | { |
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| 288 | std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos; |
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| 289 | pos = tableData.find(particleName); |
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| 290 | |
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| 291 | if (pos != tableData.end()) |
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| 292 | { |
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| 293 | G4DNACrossSectionDataSet* table = pos->second; |
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| 294 | if (table != 0) |
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| 295 | { |
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| 296 | sigma = table->FindValue(ekin); |
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| 297 | } |
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| 298 | } |
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| 299 | else |
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| 300 | { |
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| 301 | G4Exception("G4DNABornIonisationModel::CrossSectionPerVolume: attempting to calculate cross section for wrong particle"); |
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| 302 | } |
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| 303 | } |
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| 304 | |
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| 305 | if (verboseLevel > 3) |
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| 306 | { |
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| 307 | G4cout << "---> Kinetic energy(eV)=" << ekin/eV << G4endl; |
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| 308 | G4cout << " - Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl; |
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[1315] | 309 | G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl; |
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[1058] | 310 | } |
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| 311 | |
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| 312 | } // if (waterMaterial) |
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| 313 | |
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[1315] | 314 | return sigma*material->GetAtomicNumDensityVector()[1]; |
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[1058] | 315 | |
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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 | void G4DNABornIonisationModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect, |
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| 321 | const G4MaterialCutsCouple* /*couple*/, |
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| 322 | const G4DynamicParticle* particle, |
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| 323 | G4double, |
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| 324 | G4double) |
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| 325 | { |
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| 326 | |
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| 327 | if (verboseLevel > 3) |
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| 328 | G4cout << "Calling SampleSecondaries() of G4DNABornIonisationModel" << G4endl; |
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| 329 | |
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| 330 | G4double lowLim = 0; |
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| 331 | G4double highLim = 0; |
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| 332 | |
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| 333 | G4double k = particle->GetKineticEnergy(); |
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| 334 | |
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| 335 | const G4String& particleName = particle->GetDefinition()->GetParticleName(); |
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| 336 | |
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| 337 | std::map< G4String,G4double,std::less<G4String> >::iterator pos1; |
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| 338 | pos1 = lowEnergyLimit.find(particleName); |
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| 339 | |
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| 340 | if (pos1 != lowEnergyLimit.end()) |
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| 341 | { |
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| 342 | lowLim = pos1->second; |
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| 343 | } |
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| 344 | |
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| 345 | std::map< G4String,G4double,std::less<G4String> >::iterator pos2; |
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| 346 | pos2 = highEnergyLimit.find(particleName); |
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| 347 | |
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| 348 | if (pos2 != highEnergyLimit.end()) |
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| 349 | { |
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| 350 | highLim = pos2->second; |
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| 351 | } |
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| 352 | |
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| 353 | if (k >= lowLim && k < highLim) |
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| 354 | { |
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| 355 | G4ParticleMomentum primaryDirection = particle->GetMomentumDirection(); |
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| 356 | G4double particleMass = particle->GetDefinition()->GetPDGMass(); |
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| 357 | G4double totalEnergy = k + particleMass; |
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| 358 | G4double pSquare = k * (totalEnergy + particleMass); |
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| 359 | G4double totalMomentum = std::sqrt(pSquare); |
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| 360 | |
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| 361 | G4int ionizationShell = RandomSelect(k,particleName); |
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| 362 | |
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| 363 | G4double secondaryKinetic = RandomizeEjectedElectronEnergy(particle->GetDefinition(),k,ionizationShell); |
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| 364 | |
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| 365 | G4double bindingEnergy = waterStructure.IonisationEnergy(ionizationShell); |
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| 366 | |
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| 367 | G4double cosTheta = 0.; |
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| 368 | G4double phi = 0.; |
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| 369 | RandomizeEjectedElectronDirection(particle->GetDefinition(), k,secondaryKinetic, cosTheta, phi); |
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| 370 | |
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| 371 | G4double sinTheta = std::sqrt(1.-cosTheta*cosTheta); |
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| 372 | G4double dirX = sinTheta*std::cos(phi); |
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| 373 | G4double dirY = sinTheta*std::sin(phi); |
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| 374 | G4double dirZ = cosTheta; |
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| 375 | G4ThreeVector deltaDirection(dirX,dirY,dirZ); |
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| 376 | deltaDirection.rotateUz(primaryDirection); |
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| 377 | |
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[1340] | 378 | if (particle->GetDefinition() == G4Electron::ElectronDefinition()) |
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| 379 | { |
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| 380 | G4double deltaTotalMomentum = std::sqrt(secondaryKinetic*(secondaryKinetic + 2.*electron_mass_c2 )); |
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[1058] | 381 | |
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[1340] | 382 | G4double finalPx = totalMomentum*primaryDirection.x() - deltaTotalMomentum*deltaDirection.x(); |
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| 383 | G4double finalPy = totalMomentum*primaryDirection.y() - deltaTotalMomentum*deltaDirection.y(); |
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| 384 | G4double finalPz = totalMomentum*primaryDirection.z() - deltaTotalMomentum*deltaDirection.z(); |
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| 385 | G4double finalMomentum = std::sqrt(finalPx*finalPx + finalPy*finalPy + finalPz*finalPz); |
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| 386 | finalPx /= finalMomentum; |
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| 387 | finalPy /= finalMomentum; |
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| 388 | finalPz /= finalMomentum; |
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[1058] | 389 | |
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[1340] | 390 | G4ThreeVector direction; |
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| 391 | direction.set(finalPx,finalPy,finalPz); |
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[1058] | 392 | |
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[1340] | 393 | fParticleChangeForGamma->ProposeMomentumDirection(direction.unit()) ; |
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| 394 | } |
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| 395 | |
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| 396 | else fParticleChangeForGamma->ProposeMomentumDirection(primaryDirection) ; |
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| 397 | |
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[1058] | 398 | fParticleChangeForGamma->SetProposedKineticEnergy(k-bindingEnergy-secondaryKinetic); |
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| 399 | fParticleChangeForGamma->ProposeLocalEnergyDeposit(bindingEnergy); |
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| 400 | |
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| 401 | G4DynamicParticle* dp = new G4DynamicParticle (G4Electron::Electron(),deltaDirection,secondaryKinetic) ; |
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| 402 | fvect->push_back(dp); |
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[1192] | 403 | |
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[1058] | 404 | } |
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| 405 | |
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| 406 | } |
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| 407 | |
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| 408 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 409 | |
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| 410 | G4double G4DNABornIonisationModel::RandomizeEjectedElectronEnergy(G4ParticleDefinition* particleDefinition, |
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| 411 | G4double k, G4int shell) |
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| 412 | { |
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| 413 | if (particleDefinition == G4Electron::ElectronDefinition()) |
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| 414 | { |
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| 415 | G4double maximumEnergyTransfer=0.; |
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| 416 | if ((k+waterStructure.IonisationEnergy(shell))/2. > k) maximumEnergyTransfer=k; |
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| 417 | else maximumEnergyTransfer = (k+waterStructure.IonisationEnergy(shell))/2.; |
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| 418 | |
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[1192] | 419 | // SI : original method |
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| 420 | /* |
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[1058] | 421 | G4double crossSectionMaximum = 0.; |
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| 422 | for(G4double value=waterStructure.IonisationEnergy(shell); value<=maximumEnergyTransfer; value+=0.1*eV) |
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| 423 | { |
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| 424 | G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell); |
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| 425 | if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection; |
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| 426 | } |
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[1192] | 427 | */ |
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| 428 | |
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[1058] | 429 | |
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[1192] | 430 | // SI : alternative method |
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| 431 | |
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| 432 | G4double crossSectionMaximum = 0.; |
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| 433 | |
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| 434 | G4double minEnergy = waterStructure.IonisationEnergy(shell); |
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| 435 | G4double maxEnergy = maximumEnergyTransfer; |
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| 436 | G4int nEnergySteps = 50; |
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| 437 | |
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| 438 | G4double value(minEnergy); |
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| 439 | G4double stpEnergy(std::pow(maxEnergy/value, 1./static_cast<G4double>(nEnergySteps-1))); |
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| 440 | G4int step(nEnergySteps); |
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| 441 | while (step>0) |
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| 442 | { |
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| 443 | step--; |
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| 444 | G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell); |
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| 445 | if(differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection; |
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| 446 | value*=stpEnergy; |
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| 447 | } |
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| 448 | // |
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| 449 | |
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[1058] | 450 | G4double secondaryElectronKineticEnergy=0.; |
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| 451 | do |
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| 452 | { |
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| 453 | secondaryElectronKineticEnergy = G4UniformRand() * (maximumEnergyTransfer-waterStructure.IonisationEnergy(shell)); |
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| 454 | } while(G4UniformRand()*crossSectionMaximum > |
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| 455 | DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell)); |
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| 456 | |
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| 457 | return secondaryElectronKineticEnergy; |
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| 458 | |
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| 459 | } |
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| 460 | |
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| 461 | if (particleDefinition == G4Proton::ProtonDefinition()) |
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| 462 | { |
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[1315] | 463 | G4double maximumKineticEnergyTransfer = 4.* (electron_mass_c2 / proton_mass_c2) * k; |
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[1058] | 464 | |
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| 465 | G4double crossSectionMaximum = 0.; |
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| 466 | for (G4double value = waterStructure.IonisationEnergy(shell); |
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| 467 | value<=4.*waterStructure.IonisationEnergy(shell) ; |
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| 468 | value+=0.1*eV) |
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| 469 | { |
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| 470 | G4double differentialCrossSection = DifferentialCrossSection(particleDefinition, k/eV, value/eV, shell); |
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| 471 | if (differentialCrossSection >= crossSectionMaximum) crossSectionMaximum = differentialCrossSection; |
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| 472 | } |
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| 473 | |
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| 474 | G4double secondaryElectronKineticEnergy = 0.; |
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| 475 | do |
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| 476 | { |
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| 477 | secondaryElectronKineticEnergy = G4UniformRand() * maximumKineticEnergyTransfer; |
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| 478 | } while(G4UniformRand()*crossSectionMaximum >= |
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| 479 | DifferentialCrossSection(particleDefinition, k/eV,(secondaryElectronKineticEnergy+waterStructure.IonisationEnergy(shell))/eV,shell)); |
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| 480 | |
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| 481 | return secondaryElectronKineticEnergy; |
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| 482 | } |
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| 483 | |
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| 484 | return 0; |
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| 485 | } |
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| 486 | |
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| 487 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 488 | |
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| 489 | void G4DNABornIonisationModel::RandomizeEjectedElectronDirection(G4ParticleDefinition* particleDefinition, |
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| 490 | G4double k, |
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| 491 | G4double secKinetic, |
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| 492 | G4double & cosTheta, |
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| 493 | G4double & phi ) |
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| 494 | { |
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| 495 | if (particleDefinition == G4Electron::ElectronDefinition()) |
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| 496 | { |
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| 497 | phi = twopi * G4UniformRand(); |
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| 498 | if (secKinetic < 50.*eV) cosTheta = (2.*G4UniformRand())-1.; |
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| 499 | else if (secKinetic <= 200.*eV) |
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| 500 | { |
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| 501 | if (G4UniformRand() <= 0.1) cosTheta = (2.*G4UniformRand())-1.; |
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| 502 | else cosTheta = G4UniformRand()*(std::sqrt(2.)/2); |
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| 503 | } |
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| 504 | else |
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| 505 | { |
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| 506 | G4double sin2O = (1.-secKinetic/k) / (1.+secKinetic/(2.*electron_mass_c2)); |
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| 507 | cosTheta = std::sqrt(1.-sin2O); |
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| 508 | } |
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| 509 | } |
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| 510 | |
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| 511 | if (particleDefinition == G4Proton::ProtonDefinition()) |
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| 512 | { |
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| 513 | G4double maxSecKinetic = 4.* (electron_mass_c2 / proton_mass_c2) * k; |
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| 514 | phi = twopi * G4UniformRand(); |
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[1340] | 515 | |
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| 516 | // cosTheta = std::sqrt(secKinetic / maxSecKinetic); |
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| 517 | |
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| 518 | // Restriction below 100 eV from Emfietzoglou (2000) |
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| 519 | |
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| 520 | if (secKinetic>100*eV) cosTheta = std::sqrt(secKinetic / maxSecKinetic); |
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| 521 | else cosTheta = (2.*G4UniformRand())-1.; |
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| 522 | |
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[1058] | 523 | } |
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| 524 | } |
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| 525 | |
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| 526 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 527 | |
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| 528 | double G4DNABornIonisationModel::DifferentialCrossSection(G4ParticleDefinition * particleDefinition, |
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| 529 | G4double k, |
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| 530 | G4double energyTransfer, |
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| 531 | G4int ionizationLevelIndex) |
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| 532 | { |
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| 533 | G4double sigma = 0.; |
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| 534 | |
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| 535 | if (energyTransfer >= waterStructure.IonisationEnergy(ionizationLevelIndex)) |
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| 536 | { |
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| 537 | G4double valueT1 = 0; |
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| 538 | G4double valueT2 = 0; |
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| 539 | G4double valueE21 = 0; |
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| 540 | G4double valueE22 = 0; |
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| 541 | G4double valueE12 = 0; |
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| 542 | G4double valueE11 = 0; |
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| 543 | |
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| 544 | G4double xs11 = 0; |
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| 545 | G4double xs12 = 0; |
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| 546 | G4double xs21 = 0; |
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| 547 | G4double xs22 = 0; |
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| 548 | |
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| 549 | if (particleDefinition == G4Electron::ElectronDefinition()) |
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| 550 | { |
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| 551 | // k should be in eV and energy transfer eV also |
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| 552 | |
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| 553 | std::vector<double>::iterator t2 = std::upper_bound(eTdummyVec.begin(),eTdummyVec.end(), k); |
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| 554 | |
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| 555 | std::vector<double>::iterator t1 = t2-1; |
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| 556 | |
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| 557 | // SI : the following condition avoids situations where energyTransfer >last vector element |
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[1192] | 558 | if (energyTransfer <= eVecm[(*t1)].back() && energyTransfer <= eVecm[(*t2)].back() ) |
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[1058] | 559 | { |
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| 560 | std::vector<double>::iterator e12 = std::upper_bound(eVecm[(*t1)].begin(),eVecm[(*t1)].end(), energyTransfer); |
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| 561 | std::vector<double>::iterator e11 = e12-1; |
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| 562 | |
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| 563 | std::vector<double>::iterator e22 = std::upper_bound(eVecm[(*t2)].begin(),eVecm[(*t2)].end(), energyTransfer); |
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| 564 | std::vector<double>::iterator e21 = e22-1; |
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| 565 | |
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| 566 | valueT1 =*t1; |
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| 567 | valueT2 =*t2; |
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| 568 | valueE21 =*e21; |
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| 569 | valueE22 =*e22; |
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| 570 | valueE12 =*e12; |
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| 571 | valueE11 =*e11; |
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| 572 | |
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| 573 | xs11 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11]; |
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| 574 | xs12 = eDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12]; |
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| 575 | xs21 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21]; |
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| 576 | xs22 = eDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22]; |
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| 577 | } |
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| 578 | |
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| 579 | } |
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| 580 | |
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| 581 | if (particleDefinition == G4Proton::ProtonDefinition()) |
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| 582 | { |
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| 583 | // k should be in eV and energy transfer eV also |
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| 584 | std::vector<double>::iterator t2 = std::upper_bound(pTdummyVec.begin(),pTdummyVec.end(), k); |
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| 585 | std::vector<double>::iterator t1 = t2-1; |
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| 586 | |
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| 587 | std::vector<double>::iterator e12 = std::upper_bound(pVecm[(*t1)].begin(),pVecm[(*t1)].end(), energyTransfer); |
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| 588 | std::vector<double>::iterator e11 = e12-1; |
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| 589 | |
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| 590 | std::vector<double>::iterator e22 = std::upper_bound(pVecm[(*t2)].begin(),pVecm[(*t2)].end(), energyTransfer); |
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| 591 | std::vector<double>::iterator e21 = e22-1; |
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| 592 | |
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| 593 | valueT1 =*t1; |
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| 594 | valueT2 =*t2; |
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| 595 | valueE21 =*e21; |
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| 596 | valueE22 =*e22; |
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| 597 | valueE12 =*e12; |
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| 598 | valueE11 =*e11; |
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| 599 | |
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| 600 | xs11 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE11]; |
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| 601 | xs12 = pDiffCrossSectionData[ionizationLevelIndex][valueT1][valueE12]; |
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| 602 | xs21 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE21]; |
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| 603 | xs22 = pDiffCrossSectionData[ionizationLevelIndex][valueT2][valueE22]; |
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| 604 | |
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| 605 | } |
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| 606 | |
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| 607 | G4double xsProduct = xs11 * xs12 * xs21 * xs22; |
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| 608 | if (xsProduct != 0.) |
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| 609 | { |
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| 610 | sigma = QuadInterpolator( valueE11, valueE12, |
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| 611 | valueE21, valueE22, |
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| 612 | xs11, xs12, |
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| 613 | xs21, xs22, |
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| 614 | valueT1, valueT2, |
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| 615 | k, energyTransfer); |
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| 616 | } |
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| 617 | |
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| 618 | } |
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| 619 | |
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| 620 | return sigma; |
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| 621 | } |
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| 622 | |
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| 623 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 624 | |
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| 625 | G4double G4DNABornIonisationModel::LogLogInterpolate(G4double e1, |
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| 626 | G4double e2, |
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| 627 | G4double e, |
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| 628 | G4double xs1, |
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| 629 | G4double xs2) |
---|
| 630 | { |
---|
| 631 | G4double a = (std::log10(xs2)-std::log10(xs1)) / (std::log10(e2)-std::log10(e1)); |
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| 632 | G4double b = std::log10(xs2) - a*std::log10(e2); |
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| 633 | G4double sigma = a*std::log10(e) + b; |
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| 634 | G4double value = (std::pow(10.,sigma)); |
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| 635 | return value; |
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| 636 | } |
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| 637 | |
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| 638 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 639 | |
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| 640 | G4double G4DNABornIonisationModel::QuadInterpolator(G4double e11, G4double e12, |
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| 641 | G4double e21, G4double e22, |
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| 642 | G4double xs11, G4double xs12, |
---|
| 643 | G4double xs21, G4double xs22, |
---|
| 644 | G4double t1, G4double t2, |
---|
| 645 | G4double t, G4double e) |
---|
| 646 | { |
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| 647 | G4double interpolatedvalue1 = LogLogInterpolate(e11, e12, e, xs11, xs12); |
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| 648 | G4double interpolatedvalue2 = LogLogInterpolate(e21, e22, e, xs21, xs22); |
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| 649 | G4double value = LogLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2); |
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| 650 | return value; |
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| 651 | } |
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| 652 | |
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| 653 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 654 | |
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| 655 | G4int G4DNABornIonisationModel::RandomSelect(G4double k, const G4String& particle ) |
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| 656 | { |
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| 657 | G4int level = 0; |
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| 658 | |
---|
| 659 | std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos; |
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| 660 | pos = tableData.find(particle); |
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| 661 | |
---|
| 662 | if (pos != tableData.end()) |
---|
| 663 | { |
---|
| 664 | G4DNACrossSectionDataSet* table = pos->second; |
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| 665 | |
---|
| 666 | if (table != 0) |
---|
| 667 | { |
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| 668 | G4double* valuesBuffer = new G4double[table->NumberOfComponents()]; |
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| 669 | const size_t n(table->NumberOfComponents()); |
---|
| 670 | size_t i(n); |
---|
| 671 | G4double value = 0.; |
---|
| 672 | |
---|
| 673 | while (i>0) |
---|
| 674 | { |
---|
| 675 | i--; |
---|
| 676 | valuesBuffer[i] = table->GetComponent(i)->FindValue(k); |
---|
| 677 | value += valuesBuffer[i]; |
---|
| 678 | } |
---|
| 679 | |
---|
| 680 | value *= G4UniformRand(); |
---|
| 681 | |
---|
| 682 | i = n; |
---|
| 683 | |
---|
| 684 | while (i > 0) |
---|
| 685 | { |
---|
| 686 | i--; |
---|
| 687 | |
---|
| 688 | if (valuesBuffer[i] > value) |
---|
| 689 | { |
---|
| 690 | delete[] valuesBuffer; |
---|
| 691 | return i; |
---|
| 692 | } |
---|
| 693 | value -= valuesBuffer[i]; |
---|
| 694 | } |
---|
| 695 | |
---|
| 696 | if (valuesBuffer) delete[] valuesBuffer; |
---|
| 697 | |
---|
| 698 | } |
---|
| 699 | } |
---|
| 700 | else |
---|
| 701 | { |
---|
| 702 | G4Exception("G4DNABornIonisationModel::RandomSelect attempting to calculate cross section for wrong particle"); |
---|
| 703 | } |
---|
| 704 | |
---|
| 705 | return level; |
---|
| 706 | } |
---|
| 707 | |
---|