[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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| 26 | #include "G4NeutronIsoIsoCrossSections.hh" |
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| 27 | #include "G4NeutronHPDataUsed.hh" |
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| 28 | #include "G4NeutronInelasticCrossSection.hh" |
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| 29 | |
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| 30 | G4NeutronIsoIsoCrossSections:: |
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| 31 | G4NeutronIsoIsoCrossSections() |
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| 32 | : theCrossSection(), theNames() |
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| 33 | { |
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| 34 | theProductionData = NULL; |
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| 35 | hasData = false; |
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| 36 | theNumberOfProducts = 0; |
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| 37 | theZ = 0; |
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| 38 | theA = 0; |
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| 39 | } |
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| 40 | |
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| 41 | G4NeutronIsoIsoCrossSections:: |
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| 42 | ~G4NeutronIsoIsoCrossSections() |
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| 43 | { |
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| 44 | for(G4int i=0; i<theNumberOfProducts; i++) |
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| 45 | { |
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| 46 | delete theProductionData[i]; |
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| 47 | } |
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| 48 | delete theProductionData; |
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| 49 | } |
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| 50 | |
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| 51 | void G4NeutronIsoIsoCrossSections:: |
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| 52 | Init(G4int A, G4int Z, G4double frac) |
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| 53 | { |
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| 54 | frac = frac/100.; |
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| 55 | // First transmution scattering cross-section |
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| 56 | // in our definition inelastic and fission. |
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| 57 | |
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| 58 | theZ = Z; |
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| 59 | theA = A; |
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| 60 | theNames.SetMaxOffSet(5); |
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| 61 | G4NeutronHPDataUsed dataUsed; |
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| 62 | G4String rest = "/CrossSection/"; |
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| 63 | G4String base = getenv("G4NEUTRONHPDATA"); |
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| 64 | G4String base1 = base + "/Inelastic/"; |
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| 65 | G4bool hasInelasticData = false; |
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| 66 | dataUsed = theNames.GetName(A, Z, base1, rest, hasInelasticData); |
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| 67 | G4String aName = dataUsed.GetName(); |
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| 68 | G4NeutronHPVector inelasticData; |
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| 69 | G4double dummy; |
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| 70 | G4int total; |
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| 71 | if(hasInelasticData) |
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| 72 | { |
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| 73 | std::ifstream aDataSet(aName, std::ios::in); |
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| 74 | aDataSet >> dummy >> dummy >> total; |
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| 75 | inelasticData.Init(aDataSet, total, eV); |
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| 76 | } |
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| 77 | base1 = base + "/Capture/"; |
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| 78 | G4bool hasCaptureData = false; |
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| 79 | dataUsed = theNames.GetName(A, Z, base1, rest, hasCaptureData); |
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| 80 | aName = dataUsed.GetName(); |
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| 81 | G4NeutronHPVector captureData; |
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| 82 | if(hasCaptureData) |
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| 83 | { |
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| 84 | std::ifstream aDataSet(aName, std::ios::in); |
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| 85 | aDataSet >> dummy >> dummy >> total; |
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| 86 | captureData.Init(aDataSet, total, eV); |
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| 87 | } |
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| 88 | base1 = base + "/Elastic/"; |
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| 89 | G4bool hasElasticData = false; |
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| 90 | dataUsed = theNames.GetName(A, Z, base1, rest, hasElasticData); |
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| 91 | aName = dataUsed.GetName(); |
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| 92 | G4NeutronHPVector elasticData; |
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| 93 | if(hasElasticData) |
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| 94 | { |
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| 95 | std::ifstream aDataSet(aName, std::ios::in); |
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| 96 | aDataSet >> dummy >> dummy >> total; |
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| 97 | elasticData.Init(aDataSet, total, eV); |
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| 98 | } |
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| 99 | base1 = base + "/Fission/"; |
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| 100 | G4bool hasFissionData = false; |
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| 101 | if(Z>=91) |
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| 102 | { |
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| 103 | dataUsed = theNames.GetName(A, Z, base1, rest, hasFissionData); |
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| 104 | aName = dataUsed.GetName(); |
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| 105 | } |
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| 106 | G4NeutronHPVector fissionData; |
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| 107 | if(hasFissionData) |
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| 108 | { |
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| 109 | std::ifstream aDataSet(aName, std::ios::in); |
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| 110 | aDataSet >> dummy >> dummy >> total; |
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| 111 | fissionData.Init(aDataSet, total, eV); |
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| 112 | } |
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| 113 | hasData = hasFissionData||hasInelasticData||hasElasticData||hasCaptureData; |
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| 114 | G4NeutronHPVector merged, merged1; |
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| 115 | if(hasData) |
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| 116 | { |
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| 117 | if(hasFissionData&&hasInelasticData) |
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| 118 | { |
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| 119 | merged = fissionData + inelasticData; |
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| 120 | } |
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| 121 | else if(hasFissionData) |
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| 122 | { |
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| 123 | merged = fissionData; |
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| 124 | } |
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| 125 | else if(hasInelasticData) |
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| 126 | { |
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| 127 | merged = inelasticData; |
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| 128 | } |
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| 129 | |
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| 130 | if(hasElasticData&&hasCaptureData) |
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| 131 | { |
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| 132 | merged1=elasticData + captureData; |
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| 133 | } |
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| 134 | else if(hasCaptureData) |
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| 135 | { |
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| 136 | merged1 = captureData; |
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| 137 | } |
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| 138 | else if(hasElasticData) |
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| 139 | { |
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| 140 | merged1 = elasticData; |
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| 141 | } |
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| 142 | |
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| 143 | if((hasElasticData||hasCaptureData)&&(hasFissionData||hasInelasticData)) |
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| 144 | { |
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| 145 | theCrossSection = merged + merged1; |
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| 146 | } |
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| 147 | else if(hasElasticData||hasCaptureData) |
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| 148 | { |
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| 149 | theCrossSection = merged1; |
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| 150 | } |
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| 151 | else if(hasFissionData||hasInelasticData) |
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| 152 | { |
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| 153 | theCrossSection = merged; |
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| 154 | } |
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| 155 | theCrossSection.Times(frac); |
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| 156 | } |
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| 157 | // theCrossSection.Dump(); |
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| 158 | |
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| 159 | // now isotope-production cross-sections |
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| 160 | theNames.SetMaxOffSet(1); |
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| 161 | rest = "/CrossSection/"; |
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| 162 | base1 = base + "/IsotopeProduction/"; |
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| 163 | G4bool hasIsotopeProductionData; |
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| 164 | dataUsed = theNames.GetName(A, Z, base1, rest, hasIsotopeProductionData); |
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| 165 | aName = dataUsed.GetName(); |
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| 166 | if(hasIsotopeProductionData) |
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| 167 | { |
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| 168 | std::ifstream aDataSet(aName, std::ios::in); |
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| 169 | aDataSet>>theNumberOfProducts; |
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| 170 | theProductionData = new G4IsoProdCrossSections * [theNumberOfProducts]; |
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| 171 | for(G4int i=0; i<theNumberOfProducts; i++) |
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| 172 | { |
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| 173 | G4String aName; |
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| 174 | aDataSet >> aName; |
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| 175 | aDataSet >> dummy >> dummy; |
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| 176 | theProductionData[i] = new G4IsoProdCrossSections(aName); |
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| 177 | theProductionData[i]->Init(aDataSet); |
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| 178 | } |
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| 179 | } |
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| 180 | else |
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| 181 | { |
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| 182 | hasData = false; |
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| 183 | } |
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| 184 | G4NeutronInelasticCrossSection theParametrization; |
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| 185 | G4double lastEnergy = theCrossSection.GetX(theCrossSection.GetVectorLength()-1); |
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| 186 | G4double lastValue = theCrossSection.GetY(theCrossSection.GetVectorLength()-1); |
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| 187 | G4double norm = theParametrization.GetCrossSection(lastEnergy, A, Z); |
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| 188 | G4double increment = 1*MeV; |
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| 189 | while(lastEnergy+increment<101*MeV) |
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| 190 | { |
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| 191 | G4double currentEnergy = lastEnergy+increment; |
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| 192 | G4double value = theParametrization.GetCrossSection(currentEnergy, A, Z)*(lastValue/norm); |
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| 193 | G4int position = theCrossSection.GetVectorLength(); |
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| 194 | theCrossSection.SetData(position, currentEnergy, value); |
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| 195 | increment+=1*MeV; |
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| 196 | } |
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| 197 | } |
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| 198 | |
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| 199 | G4double G4NeutronIsoIsoCrossSections:: |
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| 200 | GetCrossSection(G4double anEnergy) |
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| 201 | { |
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| 202 | G4double result; |
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| 203 | result = theCrossSection.GetY(anEnergy); |
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| 204 | return result; |
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| 205 | } |
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| 206 | |
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| 207 | G4String G4NeutronIsoIsoCrossSections:: |
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| 208 | GetProductIsotope(G4double anEnergy) |
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| 209 | { |
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| 210 | G4String result = "UNCHANGED"; |
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| 211 | |
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| 212 | G4double totalXSec = theCrossSection.GetY(anEnergy); |
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| 213 | if(totalXSec==0) return result; |
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| 214 | |
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| 215 | // now do the isotope changing reactions |
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| 216 | G4double * xSec = new G4double[theNumberOfProducts]; |
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| 217 | G4double sum = 0; |
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| 218 | { |
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| 219 | for(G4int i=0; i<theNumberOfProducts; i++) |
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| 220 | { |
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| 221 | xSec[i] = theProductionData[i]->GetProductionCrossSection(anEnergy); |
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| 222 | sum += xSec[i]; |
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| 223 | } |
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| 224 | } |
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| 225 | G4double isoChangeXsec = sum; |
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| 226 | G4double rand = G4UniformRand(); |
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| 227 | if(rand > isoChangeXsec/totalXSec) |
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| 228 | { |
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| 229 | delete [] xSec; |
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| 230 | return result; |
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| 231 | } |
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| 232 | G4double random = G4UniformRand(); |
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| 233 | G4double running = 0; |
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| 234 | G4int index(0); |
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| 235 | { |
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| 236 | for(G4int i=0; i<theNumberOfProducts; i++) |
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| 237 | { |
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| 238 | running += xSec[i]; |
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| 239 | index = i; |
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| 240 | if(random<=running/sum) break; |
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| 241 | } |
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| 242 | } |
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| 243 | delete [] xSec; |
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| 244 | result = theProductionData[index]->GetProductIsotope(); |
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| 245 | |
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| 246 | return result; |
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| 247 | } |
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