[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 | // neutron_hp -- source file |
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| 27 | // J.P. Wellisch, Nov-1996 |
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| 28 | // A prototype of the low energy neutron transport model. |
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| 29 | // |
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| 30 | #include "G4NeutronHPLabAngularEnergy.hh" |
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| 31 | #include "G4Gamma.hh" |
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| 32 | #include "G4Electron.hh" |
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| 33 | #include "G4Positron.hh" |
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| 34 | #include "G4Neutron.hh" |
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| 35 | #include "G4Proton.hh" |
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| 36 | #include "G4Deuteron.hh" |
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| 37 | #include "G4Triton.hh" |
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| 38 | #include "G4He3.hh" |
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| 39 | #include "G4Alpha.hh" |
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| 40 | #include "Randomize.hh" |
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| 41 | |
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| 42 | void G4NeutronHPLabAngularEnergy::Init(std::ifstream & aDataFile) |
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| 43 | { |
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| 44 | aDataFile >> nEnergies; |
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| 45 | theManager.Init(aDataFile); |
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| 46 | theEnergies = new G4double[nEnergies]; |
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| 47 | nCosTh = new G4int[nEnergies]; |
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| 48 | theData = new G4NeutronHPVector * [nEnergies]; |
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| 49 | theSecondManager = new G4InterpolationManager [nEnergies]; |
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| 50 | for(G4int i=0; i<nEnergies; i++) |
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| 51 | { |
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| 52 | aDataFile >> theEnergies[i]; |
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| 53 | theEnergies[i]*=eV; |
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| 54 | aDataFile >> nCosTh[i]; |
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| 55 | theSecondManager[i].Init(aDataFile); |
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| 56 | theData[i] = new G4NeutronHPVector[nCosTh[i]]; |
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| 57 | G4double label; |
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| 58 | for(G4int ii=0; ii<nCosTh[i]; ii++) |
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| 59 | { |
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| 60 | aDataFile >> label; |
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| 61 | theData[i][ii].SetLabel(label); |
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| 62 | theData[i][ii].Init(aDataFile, eV); |
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| 63 | } |
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| 64 | } |
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| 65 | } |
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| 66 | |
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| 67 | G4ReactionProduct * G4NeutronHPLabAngularEnergy::Sample(G4double anEnergy, G4double massCode, G4double ) |
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| 68 | { |
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| 69 | G4ReactionProduct * result = new G4ReactionProduct; |
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| 70 | G4int Z = static_cast<G4int>(massCode/1000); |
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| 71 | G4int A = static_cast<G4int>(massCode-1000*Z); |
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| 72 | |
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| 73 | if(massCode==0) |
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| 74 | { |
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| 75 | result->SetDefinition(G4Gamma::Gamma()); |
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| 76 | } |
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| 77 | else if(A==0) |
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| 78 | { |
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| 79 | result->SetDefinition(G4Electron::Electron()); |
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| 80 | if(Z==1) result->SetDefinition(G4Positron::Positron()); |
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| 81 | } |
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| 82 | else if(A==1) |
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| 83 | { |
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| 84 | result->SetDefinition(G4Neutron::Neutron()); |
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| 85 | if(Z==1) result->SetDefinition(G4Proton::Proton()); |
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| 86 | } |
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| 87 | else if(A==2) |
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| 88 | { |
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| 89 | result->SetDefinition(G4Deuteron::Deuteron()); |
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| 90 | } |
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| 91 | else if(A==3) |
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| 92 | { |
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| 93 | result->SetDefinition(G4Triton::Triton()); |
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| 94 | if(Z==2) result->SetDefinition(G4He3::He3()); |
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| 95 | } |
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| 96 | else if(A==4) |
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| 97 | { |
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| 98 | result->SetDefinition(G4Alpha::Alpha()); |
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| 99 | if(Z!=2) throw G4HadronicException(__FILE__, __LINE__, "Unknown ion case 1"); |
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| 100 | } |
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| 101 | else |
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| 102 | { |
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| 103 | throw G4HadronicException(__FILE__, __LINE__, "G4NeutronHPLabAngularEnergy: Unknown ion case 2"); |
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| 104 | } |
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| 105 | |
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| 106 | // get theta, E |
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| 107 | G4double cosTh, secEnergy; |
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| 108 | G4int i, it(0); |
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| 109 | // find the energy bin |
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| 110 | for(i=0; i<nEnergies; i++) |
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| 111 | { |
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| 112 | it = i; |
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| 113 | if(anEnergy<theEnergies[i]) break; |
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| 114 | } |
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| 115 | if(it==0 || it == nEnergies-1) // it marks the energy bin |
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| 116 | { |
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| 117 | // integrate the prob for each costh, and select theta. |
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| 118 | G4double * running = new G4double [nCosTh[it]]; |
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| 119 | running[0]=0; |
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| 120 | for(i=0;i<nCosTh[it]; i++) |
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| 121 | { |
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| 122 | if(i!=0) running[i] = running[i-1]; |
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| 123 | running[i]+=theData[it][i].GetIntegral(); // Does interpolated integral. |
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| 124 | } |
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| 125 | G4double random = running[nCosTh[it]-1]*G4UniformRand(); |
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| 126 | G4int ith(0); |
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| 127 | for(i=0;i<nCosTh[it]; i++) |
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| 128 | { |
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| 129 | ith = i; |
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| 130 | if(random<running[i]) break; |
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| 131 | } |
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| 132 | if(ith==0 || ith==nCosTh[it]-1) |
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| 133 | { |
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| 134 | cosTh = theData[it][ith].GetLabel(); |
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| 135 | secEnergy = theData[it][ith].Sample(); |
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| 136 | currentMeanEnergy = theData[it][ith].GetMeanX(); |
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| 137 | } |
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| 138 | else |
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| 139 | { |
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| 140 | G4double x1 = theData[it][ith-1].GetIntegral(); |
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| 141 | G4double x2 = theData[it][ith].GetIntegral(); |
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| 142 | G4double x = random; |
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| 143 | G4double y1 = theData[it][ith-1].GetLabel(); |
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| 144 | G4double y2 = theData[it][ith].GetLabel(); |
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| 145 | cosTh = theInt.Interpolate(theSecondManager[it].GetInverseScheme(ith), |
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| 146 | x, x1, x2, y1, y2); |
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| 147 | G4NeutronHPVector theBuff1; |
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| 148 | theBuff1.SetInterpolationManager(theData[it][ith-1].GetInterpolationManager()); |
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| 149 | G4NeutronHPVector theBuff2; |
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| 150 | theBuff2.SetInterpolationManager(theData[it][ith].GetInterpolationManager()); |
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| 151 | x1=y1; |
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| 152 | x2=y2; |
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| 153 | G4double y, mu; |
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| 154 | for(i=0;i<theData[it][ith-1].GetVectorLength(); i++) |
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| 155 | { |
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| 156 | mu = theData[it][ith-1].GetX(i); |
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| 157 | y1 = theData[it][ith-1].GetY(i); |
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| 158 | y2 = theData[it][ith].GetY(mu); |
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| 159 | y = theInt.Interpolate(theSecondManager[it].GetScheme(ith), |
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| 160 | cosTh, x1,x2,y1,y2); |
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| 161 | theBuff1.SetData(i, mu, y); |
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| 162 | } |
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| 163 | for(i=0;i<theData[it][ith].GetVectorLength(); i++) |
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| 164 | { |
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| 165 | mu = theData[it][ith].GetX(i); |
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| 166 | y1 = theData[it][ith-1].GetY(mu); |
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| 167 | y2 = theData[it][ith].GetY(i); |
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| 168 | y = theInt.Interpolate(theSecondManager[it].GetScheme(ith), |
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| 169 | cosTh, x1,x2,y1,y2); |
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| 170 | theBuff2.SetData(i, mu, y); |
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| 171 | } |
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| 172 | G4NeutronHPVector theStore; |
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| 173 | theStore.Merge(&theBuff1, &theBuff2); |
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| 174 | secEnergy = theStore.Sample(); |
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| 175 | currentMeanEnergy = theStore.GetMeanX(); |
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| 176 | } |
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| 177 | delete [] running; |
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| 178 | } |
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| 179 | else // this is the small big else. |
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| 180 | { |
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| 181 | G4double x, x1, x2, y1, y2, y, tmp, E; |
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| 182 | // integrate the prob for each costh, and select theta. |
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| 183 | G4NeutronHPVector run1; |
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| 184 | run1.SetY(0, 0.); |
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| 185 | for(i=0;i<nCosTh[it-1]; i++) |
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| 186 | { |
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| 187 | if(i!=0) run1.SetY(i, run1.GetY(i-1)); |
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| 188 | run1.SetX(i, theData[it-1][i].GetLabel()); |
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| 189 | run1.SetY(i, run1.GetY(i)+theData[it-1][i].GetIntegral()); |
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| 190 | } |
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| 191 | G4NeutronHPVector run2; |
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| 192 | run2.SetY(0, 0.); |
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| 193 | for(i=0;i<nCosTh[it]; i++) |
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| 194 | { |
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| 195 | if(i!=0) run2.SetY(i, run2.GetY(i-1)); |
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| 196 | run2.SetX(i, theData[it][i].GetLabel()); |
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| 197 | run2.SetY(i, run2.GetY(i)+theData[it][i].GetIntegral()); |
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| 198 | } |
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| 199 | // get the distributions for the correct neutron energy |
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| 200 | x = anEnergy; |
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| 201 | x1 = theEnergies[it-1]; |
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| 202 | x2 = theEnergies[it]; |
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| 203 | G4NeutronHPVector thBuff1; // to be interpolated as run1. |
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| 204 | thBuff1.SetInterpolationManager(theSecondManager[it-1]); |
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| 205 | for(i=0; i<run1.GetVectorLength(); i++) |
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| 206 | { |
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| 207 | tmp = run1.GetX(i); //theta |
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| 208 | y1 = run1.GetY(i); // integral |
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| 209 | y2 = run2.GetY(tmp); |
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| 210 | y = theInt.Interpolate(theManager.GetScheme(it), x, x1,x2,y1,y2); |
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| 211 | thBuff1.SetData(i, tmp, y); |
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| 212 | } |
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| 213 | G4NeutronHPVector thBuff2; |
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| 214 | thBuff2.SetInterpolationManager(theSecondManager[it]); |
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| 215 | for(i=0; i<run2.GetVectorLength(); i++) |
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| 216 | { |
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| 217 | tmp = run2.GetX(i); //theta |
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| 218 | y1 = run1.GetY(tmp); // integral |
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| 219 | y2 = run2.GetY(i); |
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| 220 | y = theInt.Lin(x, x1,x2,y1,y2); |
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| 221 | thBuff2.SetData(i, tmp, y); |
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| 222 | } |
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| 223 | G4NeutronHPVector theThVec; |
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| 224 | theThVec.Merge(&thBuff1 ,&thBuff2); // takes care of interpolation |
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| 225 | G4double random = (theThVec.GetY(theThVec.GetVectorLength()-1) |
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| 226 | -theThVec.GetY(0)) *G4UniformRand(); |
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| 227 | G4int ith(0); |
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| 228 | for(i=1;i<theThVec.GetVectorLength(); i++) |
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| 229 | { |
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| 230 | ith = i; |
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| 231 | if(random<theThVec.GetY(i)-theThVec.GetY(0)) break; |
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| 232 | } |
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| 233 | { |
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| 234 | // calculate theta |
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| 235 | G4double x, x1, x2, y1, y2; |
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| 236 | x = random; |
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| 237 | x1 = theThVec.GetY(ith-1)-theThVec.GetY(0); // integrals |
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| 238 | x2 = theThVec.GetY(ith)-theThVec.GetY(0); |
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| 239 | y1 = theThVec.GetX(ith-1); // std::cos(theta) |
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| 240 | y2 = theThVec.GetX(ith); |
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| 241 | cosTh = theInt.Interpolate(theSecondManager[it].GetScheme(ith), |
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| 242 | x, x1,x2,y1,y2); |
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| 243 | } |
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| 244 | G4int i1(0), i2(0); |
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| 245 | // get the indixes of the vectors close to theta for low energy |
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| 246 | // first it-1 !!!! i.e. low in energy |
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| 247 | for(i=0; i<nCosTh[it-1]; i++) |
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| 248 | { |
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| 249 | i1 = i; |
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| 250 | if(cosTh<theData[it-1][i].GetLabel()) break; |
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| 251 | } |
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| 252 | // now get the prob at this energy for the right theta value |
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| 253 | x = cosTh; |
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| 254 | x1 = theData[it-1][i1-1].GetLabel(); |
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| 255 | x2 = theData[it-1][i1].GetLabel(); |
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| 256 | G4NeutronHPVector theBuff1a; |
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| 257 | theBuff1a.SetInterpolationManager(theData[it-1][i1-1].GetInterpolationManager()); |
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| 258 | for(i=0;i<theData[it-1][i1-1].GetVectorLength(); i++) |
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| 259 | { |
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| 260 | E = theData[it-1][i1-1].GetX(i); |
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| 261 | y1 = theData[it-1][i1-1].GetY(i); |
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| 262 | y2 = theData[it-1][i1].GetY(E); |
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| 263 | y = theInt.Lin(x, x1,x2,y1,y2); |
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| 264 | theBuff1a.SetData(i, E, y); // wrong E, right theta. |
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| 265 | } |
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| 266 | G4NeutronHPVector theBuff2a; |
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| 267 | theBuff2a.SetInterpolationManager(theData[it-1][i1].GetInterpolationManager()); |
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| 268 | for(i=0;i<theData[it-1][i1].GetVectorLength(); i++) |
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| 269 | { |
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| 270 | E = theData[it-1][i1].GetX(i); |
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| 271 | y1 = theData[it-1][i1-1].GetY(E); |
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| 272 | y2 = theData[it-1][i1].GetY(i); |
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| 273 | y = theInt.Lin(x, x1,x2,y1,y2); |
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| 274 | theBuff2a.SetData(i, E, y); // wrong E, right theta. |
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| 275 | } |
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| 276 | G4NeutronHPVector theStore1; |
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| 277 | theStore1.Merge(&theBuff1a, &theBuff2a); // wrong E, right theta, complete binning |
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| 278 | |
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| 279 | // get the indixes of the vectors close to theta for high energy |
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| 280 | // then it !!!! i.e. high in energy |
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| 281 | for(i=0; i<nCosTh[it]; i++) |
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| 282 | { |
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| 283 | i2 = i; |
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| 284 | if(cosTh<theData[it][i2].GetLabel()) break; |
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| 285 | } // sonderfaelle mit i1 oder i2 head on fehlen. @@@@@ |
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| 286 | x1 = theData[it][i2-1].GetLabel(); |
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| 287 | x2 = theData[it][i2].GetLabel(); |
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| 288 | G4NeutronHPVector theBuff1b; |
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| 289 | theBuff1b.SetInterpolationManager(theData[it][i2-1].GetInterpolationManager()); |
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| 290 | for(i=0;i<theData[it][i2-1].GetVectorLength(); i++) |
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| 291 | { |
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| 292 | E = theData[it][i2-1].GetX(i); |
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| 293 | y1 = theData[it][i2-1].GetY(i); |
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| 294 | y2 = theData[it][i2].GetY(E); |
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| 295 | y = theInt.Lin(x, x1,x2,y1,y2); |
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| 296 | theBuff1b.SetData(i, E, y); // wrong E, right theta. |
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| 297 | } |
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| 298 | G4NeutronHPVector theBuff2b; |
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| 299 | theBuff2b.SetInterpolationManager(theData[it][i2].GetInterpolationManager()); |
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| 300 | for(i=0;i<theData[it][i1].GetVectorLength(); i++) |
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| 301 | { |
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| 302 | E = theData[it][i1].GetX(i); |
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| 303 | y1 = theData[it][i1-1].GetY(E); |
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| 304 | y2 = theData[it][i1].GetY(i); |
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| 305 | y = theInt.Lin(x, x1,x2,y1,y2); |
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| 306 | theBuff2b.SetData(i, E, y); // wrong E, right theta. |
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| 307 | } |
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| 308 | G4NeutronHPVector theStore2; |
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| 309 | theStore2.Merge(&theBuff1b, &theBuff2b); // wrong E, right theta, complete binning |
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| 310 | // now get to the right energy. |
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| 311 | |
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| 312 | x = anEnergy; |
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| 313 | x1 = theEnergies[it-1]; |
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| 314 | x2 = theEnergies[it]; |
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| 315 | G4NeutronHPVector theOne1; |
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| 316 | theOne1.SetInterpolationManager(theStore1.GetInterpolationManager()); |
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| 317 | for(i=0; i<theStore1.GetVectorLength(); i++) |
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| 318 | { |
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| 319 | E = theStore1.GetX(i); |
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| 320 | y1 = theStore1.GetY(i); |
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| 321 | y2 = theStore2.GetY(E); |
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| 322 | y = theInt.Interpolate(theManager.GetScheme(it), x, x1,x2,y1,y2); |
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| 323 | theOne1.SetData(i, E, y); // both correct |
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| 324 | } |
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| 325 | G4NeutronHPVector theOne2; |
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| 326 | theOne2.SetInterpolationManager(theStore2.GetInterpolationManager()); |
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| 327 | for(i=0; i<theStore2.GetVectorLength(); i++) |
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| 328 | { |
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| 329 | E = theStore2.GetX(i); |
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| 330 | y1 = theStore1.GetY(E); |
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| 331 | y2 = theStore2.GetY(i); |
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| 332 | y = theInt.Interpolate(theManager.GetScheme(it), x, x1,x2,y1,y2); |
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| 333 | theOne2.SetData(i, E, y); // both correct |
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| 334 | } |
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| 335 | G4NeutronHPVector theOne; |
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| 336 | theOne.Merge(&theOne1, &theOne2); // both correct, complete binning |
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| 337 | |
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| 338 | secEnergy = theOne.Sample(); |
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| 339 | currentMeanEnergy = theOne.GetMeanX(); |
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| 340 | } |
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| 341 | |
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| 342 | // now do random direction in phi, and fill the result. |
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| 343 | |
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| 344 | result->SetKineticEnergy(secEnergy); |
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| 345 | |
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| 346 | G4double phi = twopi*G4UniformRand(); |
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| 347 | G4double theta = std::acos(cosTh); |
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| 348 | G4double sinth = std::sin(theta); |
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| 349 | G4double mtot = result->GetTotalMomentum(); |
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| 350 | G4ThreeVector tempVector(mtot*sinth*std::cos(phi), mtot*sinth*std::sin(phi), mtot*std::cos(theta) ); |
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| 351 | result->SetMomentum(tempVector); |
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| 352 | |
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| 353 | return result; |
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| 354 | } |
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