1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // ------------------------------------------------------------------- |
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27 | // |
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28 | // GEANT4 Class file |
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29 | // |
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30 | // |
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31 | // File name: G4hShellCrossSectionExp.cc |
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32 | // |
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33 | // Author: Simona Saliceti (simona.saliceti@ge.infn.it) |
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34 | // |
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35 | // History: |
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36 | // ----------- |
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37 | // From 23 Oct 2001 A. Mantero G4hShellCrossSection |
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38 | // 30/03/2004 Simona Saliceti 1st implementation |
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39 | // ------------------------------------------------------------------- |
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40 | // Class Description: |
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41 | // Empiric Model for shell cross sections in proton ionisation |
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42 | // ------------------------------------------------------------------- |
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43 | // $Id: G4hShellCrossSectionExp.cc,v 1.7 2009/06/10 13:32:36 mantero Exp $ |
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44 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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45 | |
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46 | #include "globals.hh" |
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47 | #include <vector> |
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48 | #include "G4hShellCrossSectionExp.hh" |
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49 | #include "G4AtomicTransitionManager.hh" |
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50 | #include "G4Electron.hh" |
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51 | #include "G4hShellCrossSectionExpData.hh" |
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52 | #include "G4Proton.hh" |
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53 | #include "G4ParticleDefinition.hh" |
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54 | |
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55 | G4hShellCrossSectionExp::G4hShellCrossSectionExp() |
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56 | { |
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57 | kShellData = new G4hShellCrossSectionExpData(); |
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58 | } |
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59 | |
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60 | G4hShellCrossSectionExp::~G4hShellCrossSectionExp() |
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61 | { } |
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62 | |
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63 | std::vector<G4double> G4hShellCrossSectionExp::GetCrossSection(G4int Z, |
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64 | G4double incidentEnergy, |
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65 | G4double mass, |
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66 | G4double deltaEnergy, |
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67 | G4bool testFlag) const |
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68 | { |
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69 | mass = 0.0; |
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70 | deltaEnergy = 0.0; |
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71 | |
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72 | std::vector<G4double> aCrossSection; |
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73 | |
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74 | // Fill the vector of cross sections with the value just calculated |
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75 | aCrossSection.push_back(GetCrossSectionExp(Z,incidentEnergy)); |
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76 | |
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77 | if (testFlag) |
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78 | { |
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79 | G4cout <<"Element: " <<Z<<" Particle Energy: "<<incidentEnergy/MeV<<" MeV" <<G4endl; |
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80 | G4cout <<"Cross Section: "<<aCrossSection[0]/barn<<" barns"<< G4endl; |
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81 | } |
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82 | return aCrossSection; |
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83 | } |
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84 | |
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85 | //This function calculated the cross section with the Empiric model |
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86 | G4double G4hShellCrossSectionExp::GetCrossSectionExp(G4int Z, |
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87 | G4double incidentEnergy) const |
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88 | { |
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89 | // Vector that stores the calculated cross-sections for each shell: |
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90 | G4double crossSectionsInBarn = 0.0; |
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91 | G4double crossSections = 0.0; |
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92 | |
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93 | std::vector<G4double>* parVec = kShellData->GetParam(Z); |
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94 | std::vector<G4double>::iterator i = (*parVec).begin(); |
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95 | |
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96 | G4double a = *i; |
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97 | G4double b = *(i+1); |
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98 | G4double c = *(i+2); |
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99 | |
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100 | G4double incidentEnergyInMeV = incidentEnergy/MeV; |
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101 | |
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102 | if(Z<26 && Z>=6 && Z!=17) |
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103 | { |
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104 | crossSectionsInBarn = a*(std::pow(b,(1./incidentEnergyInMeV)))*(std::pow(incidentEnergyInMeV,c)); |
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105 | } |
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106 | else if((Z<66 && Z>=26) || Z==17) |
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107 | { |
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108 | crossSectionsInBarn = std::exp(a+(b/incidentEnergyInMeV)+(c*std::log(incidentEnergyInMeV))); |
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109 | } |
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110 | else if(Z<=92 && Z>=66) |
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111 | { |
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112 | crossSectionsInBarn = (std::pow(incidentEnergyInMeV,a))*std::exp(b-(c*incidentEnergyInMeV)); |
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113 | } |
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114 | else |
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115 | { |
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116 | G4cout << "Error: there is not that Z" << G4endl; |
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117 | } |
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118 | |
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119 | crossSections = crossSectionsInBarn*barn; |
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120 | return crossSections; |
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121 | } |
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122 | |
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123 | // This function gives the atomic cross section of k shell only |
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124 | void G4hShellCrossSectionExp::SetTotalCS(G4double value) |
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125 | { |
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126 | atomTotalCrossSection = value; |
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127 | } |
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128 | |
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129 | //A new implementation of Probability to calculate the cross section probability for k shell only |
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130 | std::vector<G4double> G4hShellCrossSectionExp::Probabilities( |
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131 | G4int Z, |
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132 | G4double incidentEnergy, |
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133 | G4double hMass, |
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134 | G4double deltaEnergy |
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135 | ) const |
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136 | { |
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137 | hMass = 0.0; |
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138 | deltaEnergy = 0.0; |
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139 | |
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140 | std::vector<G4double> kProbability; |
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141 | kProbability.push_back(GetCrossSectionExp(Z,incidentEnergy)/atomTotalCrossSection); |
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142 | // ---- MGP ---- Next line corrected to kProbability[0] instead of [1], which is not initialized! |
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143 | kProbability.push_back(1 - kProbability[0]); |
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144 | |
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145 | return kProbability; |
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146 | } |
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147 | |
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148 | |
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149 | |
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