[968] | 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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[1315] | 26 | // $Id: G4EmElementSelector.cc,v 1.12 2010/04/27 16:59:52 vnivanch Exp $ |
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[1337] | 27 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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[968] | 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4EmElementSelector |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 29.05.2008 |
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| 39 | // |
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| 40 | // Modifications: |
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| 41 | // |
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| 42 | // Class Description: |
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| 43 | // |
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| 44 | // Generic helper class for the random selection of an element |
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| 45 | |
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| 46 | // ------------------------------------------------------------------- |
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| 47 | // |
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| 48 | |
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| 49 | #include "G4EmElementSelector.hh" |
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| 50 | #include "G4VEmModel.hh" |
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| 51 | |
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| 52 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 53 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 54 | |
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| 55 | G4EmElementSelector::G4EmElementSelector(G4VEmModel* mod, |
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| 56 | const G4Material* mat, |
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| 57 | G4int bins, |
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| 58 | G4double emin, |
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| 59 | G4double emax, |
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[1315] | 60 | G4bool spline): |
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[968] | 61 | model(mod), material(mat), nbins(bins), cutEnergy(-1.0), |
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| 62 | lowEnergy(emin), highEnergy(emax) |
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| 63 | { |
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| 64 | G4int n = material->GetNumberOfElements(); |
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| 65 | nElmMinusOne = n - 1; |
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| 66 | theElementVector = material->GetElementVector(); |
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[1055] | 67 | element = (*theElementVector)[0]; |
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[968] | 68 | if(nElmMinusOne > 0) { |
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[1055] | 69 | xSections.reserve(n); |
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[1315] | 70 | G4PhysicsLogVector* v0 = new G4PhysicsLogVector(lowEnergy,highEnergy,nbins); |
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| 71 | xSections.push_back(v0); |
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| 72 | v0->SetSpline(spline); |
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| 73 | for(G4int i=1; i<n; ++i) { |
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| 74 | G4PhysicsLogVector* v = new G4PhysicsLogVector(*v0); |
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| 75 | v->SetSpline(spline); |
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[968] | 76 | xSections.push_back(v); |
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| 77 | } |
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| 78 | } |
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| 79 | //G4cout << "G4EmElementSelector for " << mat->GetName() << " n= " << n << G4endl; |
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| 80 | } |
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| 81 | |
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| 82 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 83 | |
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| 84 | G4EmElementSelector::~G4EmElementSelector() |
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| 85 | { |
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| 86 | if(nElmMinusOne > 0) { |
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[1196] | 87 | for(G4int i=0; i<=nElmMinusOne; ++i) { |
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[968] | 88 | delete xSections[i]; |
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| 89 | } |
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| 90 | } |
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| 91 | } |
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| 92 | |
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| 93 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 94 | |
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| 95 | void G4EmElementSelector::Initialise(const G4ParticleDefinition* part, |
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| 96 | G4double cut) |
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| 97 | { |
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| 98 | //G4cout << "G4EmElementSelector initialise for " << material->GetName() << G4endl; |
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| 99 | if(0 == nElmMinusOne || cut == cutEnergy) return; |
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| 100 | |
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| 101 | cutEnergy = cut; |
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| 102 | //G4cout << "cut(keV)= " << cut/keV << G4endl; |
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| 103 | G4double cross; |
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| 104 | |
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| 105 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume(); |
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| 106 | |
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| 107 | // loop over bins |
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[1196] | 108 | for(G4int j=0; j<=nbins; ++j) { |
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| 109 | G4double e = (xSections[0])->Energy(j); |
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[968] | 110 | model->SetupForMaterial(part, material, e); |
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| 111 | cross = 0.0; |
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| 112 | //G4cout << "j= " << j << " e(MeV)= " << e/MeV << G4endl; |
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[1315] | 113 | for (G4int i=0; i<=nElmMinusOne; ++i) { |
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[968] | 114 | cross += theAtomNumDensityVector[i]* |
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| 115 | model->ComputeCrossSectionPerAtom(part, (*theElementVector)[i], e, |
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| 116 | cutEnergy, e); |
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[1055] | 117 | xSections[i]->PutValue(j, cross); |
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[968] | 118 | } |
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[1055] | 119 | } |
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| 120 | |
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| 121 | // xSections start from null, so use probabilities from the next bin |
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[1315] | 122 | if(0.0 == (*xSections[nElmMinusOne])[0]) { |
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| 123 | for (G4int i=0; i<=nElmMinusOne; ++i) { |
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[1055] | 124 | xSections[i]->PutValue(0, (*xSections[i])[1]); |
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[968] | 125 | } |
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| 126 | } |
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[1055] | 127 | // xSections ends with null, so use probabilities from the previous bin |
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[1315] | 128 | if(0.0 == (*xSections[nElmMinusOne])[nbins]) { |
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| 129 | for (G4int i=0; i<=nElmMinusOne; ++i) { |
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[1196] | 130 | xSections[i]->PutValue(nbins, (*xSections[i])[nbins-1]); |
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[1055] | 131 | } |
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| 132 | } |
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| 133 | // perform normalization |
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[1196] | 134 | for(G4int j=0; j<=nbins; ++j) { |
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[1055] | 135 | cross = (*xSections[nElmMinusOne])[j]; |
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| 136 | // only for positive X-section |
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[1315] | 137 | if(cross > 0.0) { |
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| 138 | for (G4int i=0; i<nElmMinusOne; ++i) { |
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[1196] | 139 | G4double x = (*xSections[i])[j]/cross; |
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| 140 | xSections[i]->PutValue(j, x); |
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[1055] | 141 | } |
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| 142 | } |
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| 143 | } |
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[968] | 144 | } |
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| 145 | |
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| 146 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 147 | |
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| 148 | void G4EmElementSelector::Dump(const G4ParticleDefinition* part) |
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| 149 | { |
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| 150 | G4cout << "======== G4EmElementSelector for the " << model->GetName(); |
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| 151 | if(part) G4cout << " and " << part->GetParticleName(); |
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| 152 | G4cout << " for " << material->GetName() << " ========" << G4endl; |
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| 153 | if(0 < nElmMinusOne) { |
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| 154 | for(G4int i=0; i<nElmMinusOne; i++) { |
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| 155 | G4cout << " " << (*theElementVector)[i]->GetName() << " : " << G4endl; |
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| 156 | G4cout << *(xSections[i]) << G4endl; |
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| 157 | } |
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| 158 | } |
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[1055] | 159 | G4cout << "Last Element in element vector " |
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[968] | 160 | << (*theElementVector)[nElmMinusOne]->GetName() |
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| 161 | << G4endl; |
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[1196] | 162 | G4cout << G4endl; |
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[968] | 163 | } |
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| 164 | |
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| 165 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 166 | |
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| 167 | |
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