[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 | // $Id: G4PenelopeBremsstrahlungAngular.cc,v 1.7 2006/06/29 19:40:37 gunter Exp $ |
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| 27 | // GEANT4 tag $Name: $ |
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| 28 | // |
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| 29 | // -------------------------------------------------------------- |
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| 30 | // |
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| 31 | // File name: G4PenelopeBremsstrahlungAngular |
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| 32 | // |
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| 33 | // Author: Luciano Pandola |
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| 34 | // |
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| 35 | // Creation date: February 2003 |
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| 36 | // |
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| 37 | // History: |
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| 38 | // ----------- |
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| 39 | // 04 Feb 2003 L. Pandola 1st implementation |
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| 40 | // 19 Mar 2003 L. Pandola Bugs fixed |
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| 41 | // 07 Nov 2003 L. Pandola Added GetAtomicNumber method for testing |
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| 42 | // purposes |
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| 43 | //---------------------------------------------------------------- |
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| 44 | |
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| 45 | #include "G4PenelopeBremsstrahlungAngular.hh" |
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| 46 | #include "G4PenelopeInterpolator.hh" |
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| 47 | #include "Randomize.hh" |
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| 48 | #include "globals.hh" |
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| 49 | |
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| 50 | G4PenelopeBremsstrahlungAngular::G4PenelopeBremsstrahlungAngular (G4int Zed) |
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| 51 | : Zmat(Zed) |
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| 52 | { |
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| 53 | InterpolationTableForZ(); |
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| 54 | InterpolationForK(); |
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| 55 | } |
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| 56 | |
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| 57 | |
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| 58 | G4PenelopeBremsstrahlungAngular::~G4PenelopeBremsstrahlungAngular() |
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| 59 | { |
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| 60 | } |
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| 61 | |
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| 62 | G4int G4PenelopeBremsstrahlungAngular::GetAtomicNumber() |
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| 63 | { |
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| 64 | return Zmat; |
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| 65 | } |
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| 66 | |
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| 67 | void G4PenelopeBremsstrahlungAngular::InterpolationTableForZ() |
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| 68 | { |
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| 69 | G4double pZ[NumberofZPoints] = {2.0,8.0,13.0,47.0,79.0,92.0}; |
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| 70 | G4double pX[NumberofZPoints],pY[NumberofZPoints]; |
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| 71 | G4double QQ1[NumberofZPoints][NumberofEPoints][NumberofKPoints]; |
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| 72 | G4double QQ2[NumberofZPoints][NumberofEPoints][NumberofKPoints]; |
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| 73 | |
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| 74 | //Read information from DataBase file |
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| 75 | char* path = getenv("G4LEDATA"); |
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| 76 | if (!path) |
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| 77 | { |
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| 78 | G4String excep = "G4PenelopeBremsstrahlungAngular - G4LEDATA environment variable not set!"; |
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| 79 | G4Exception(excep); |
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| 80 | } |
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| 81 | G4String pathString(path); |
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| 82 | G4String pathFile = pathString + "/penelope/br-ang-pen.dat"; |
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| 83 | std::ifstream file(pathFile); |
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| 84 | std::filebuf* lsdp = file.rdbuf(); |
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| 85 | |
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| 86 | if (!(lsdp->is_open())) |
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| 87 | { |
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| 88 | G4String excep = "G4PenelopeBremsstrahlungAngular - data file " + pathFile + " not found!"; |
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| 89 | G4Exception(excep); |
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| 90 | } |
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| 91 | G4int i=0,j=0,k=0; // i=index for Z, j=index for E, k=index for K |
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| 92 | G4double a1,a2; |
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| 93 | while(i != -1) { |
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| 94 | file >> i >> j >> k >> a1 >> a2; |
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| 95 | if (i > -1){ |
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| 96 | QQ1[i][j][k]=a1; |
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| 97 | QQ2[i][j][k]=a2; |
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| 98 | } |
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| 99 | } |
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| 100 | file.close(); |
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| 101 | |
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| 102 | |
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| 103 | //Interpolation in Z |
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| 104 | for (i=0;i<NumberofEPoints;i++){ |
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| 105 | for (j=0;j<NumberofKPoints;j++){ |
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| 106 | for (k=0;k<NumberofZPoints;k++){ |
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| 107 | pX[k]=std::log(QQ1[k][i][j]); |
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| 108 | pY[k]=QQ2[k][i][j]; |
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| 109 | } |
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| 110 | G4PenelopeInterpolator* interpolator1 = new G4PenelopeInterpolator(pZ,pX,NumberofZPoints); |
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| 111 | Q1[i][j]=std::exp(interpolator1->CubicSplineInterpolation((G4double) Zmat)); |
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| 112 | delete interpolator1; |
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| 113 | G4PenelopeInterpolator* interpolator2 = new G4PenelopeInterpolator(pZ,pY,NumberofZPoints); |
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| 114 | Q2[i][j]=interpolator2->CubicSplineInterpolation((G4double) Zmat); |
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| 115 | delete interpolator2; |
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| 116 | } |
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| 117 | } |
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| 118 | |
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| 119 | |
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| 120 | //std::ofstream fil("matrice.dat",std::ios::app); |
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| 121 | //fil << "Numero atomico: " << Zmat << G4endl; |
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| 122 | //for (i=0;i<NumberofEPoints;i++) |
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| 123 | //{ |
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| 124 | // fil << Q1[i][0] << " " << Q1[i][1] << " " << Q1[i][2] << " " << Q1[i][3] << G4endl; |
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| 125 | //} |
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| 126 | //fil.close(); |
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| 127 | |
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| 128 | } |
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| 129 | |
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| 130 | void G4PenelopeBremsstrahlungAngular::InterpolationForK() |
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| 131 | { |
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| 132 | G4double pE[NumberofEPoints] = {1.0e-03,5.0e-03,1.0e-02,5.0e-02,1.0e-01,5.0e-01}; |
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| 133 | G4double pK[NumberofKPoints] = {0.0,0.6,0.8,0.95}; |
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| 134 | G4double ppK[reducedEnergyGrid]; |
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| 135 | G4double pX[NumberofKPoints]; |
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| 136 | G4int i,j; |
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| 137 | |
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| 138 | for(i=0;i<reducedEnergyGrid;i++){ |
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| 139 | ppK[i]=((G4double) i) * 0.05; |
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| 140 | } |
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| 141 | |
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| 142 | for(i=0;i<NumberofEPoints;i++){ |
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| 143 | betas[i]=std::sqrt(pE[i]*(pE[i]+2*electron_mass_c2))/(pE[i]+electron_mass_c2); |
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| 144 | } |
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| 145 | |
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| 146 | for (i=0;i<NumberofEPoints;i++){ |
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| 147 | for (j=0;j<NumberofKPoints;j++){ |
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| 148 | Q1[i][j]=Q1[i][j]/((G4double) Zmat); |
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| 149 | } |
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| 150 | } |
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| 151 | |
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| 152 | //Expanded table of distribution parameters |
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| 153 | for (i=0;i<NumberofEPoints;i++){ |
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| 154 | for (j=0;j<NumberofKPoints;j++){ |
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| 155 | pX[j]=std::log(Q1[i][j]); //logarithmic |
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| 156 | } |
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| 157 | G4PenelopeInterpolator* interpolator = new G4PenelopeInterpolator(pK,pX,NumberofKPoints); |
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| 158 | for (j=0;j<reducedEnergyGrid;j++){ |
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| 159 | Q1E[i][j]=interpolator->CubicSplineInterpolation(ppK[j]); |
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| 160 | } |
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| 161 | delete interpolator; |
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| 162 | for (j=0;j<NumberofKPoints;j++){ |
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| 163 | pX[j]=Q2[i][j]; |
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| 164 | } |
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| 165 | G4PenelopeInterpolator* interpolator2 = new G4PenelopeInterpolator(pK,pX,NumberofKPoints); |
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| 166 | for (j=0;j<reducedEnergyGrid;j++){ |
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| 167 | Q2E[i][j]=interpolator2->CubicSplineInterpolation(ppK[j]); |
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| 168 | } |
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| 169 | delete interpolator2; |
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| 170 | } |
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| 171 | } |
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| 172 | |
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| 173 | G4double G4PenelopeBremsstrahlungAngular::ExtractCosTheta(G4double e1,G4double e2) |
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| 174 | { |
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| 175 | //e1 = kinetic energy of the electron |
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| 176 | //e2 = energy of the bremsstrahlung photon |
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| 177 | |
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| 178 | G4double beta = std::sqrt(e1*(e1+2*electron_mass_c2))/(e1+electron_mass_c2); |
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| 179 | |
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| 180 | |
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| 181 | |
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| 182 | G4double RK=20.0*e2/e1; |
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| 183 | G4int ik=std::min((G4int) RK,19); |
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| 184 | |
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| 185 | G4double P10=0,P11=0,P1=0; |
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| 186 | G4double P20=0,P21=0,P2=0; |
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| 187 | G4double pX[NumberofEPoints]; |
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| 188 | //First coefficient |
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| 189 | G4int i; |
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| 190 | G4int j = ik; |
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| 191 | for (i=0;i<NumberofEPoints;i++){ |
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| 192 | pX[i]=Q1E[i][j]; |
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| 193 | } |
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| 194 | G4PenelopeInterpolator* interpolator = new G4PenelopeInterpolator(betas,pX,NumberofEPoints); |
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| 195 | P10=interpolator->CubicSplineInterpolation(beta); |
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| 196 | delete interpolator; |
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| 197 | j++; //(j=ik+1) |
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| 198 | for (i=0;i<NumberofEPoints;i++){ |
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| 199 | pX[i]=Q1E[i][j]; |
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| 200 | } |
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| 201 | G4PenelopeInterpolator* interpolator2 = new G4PenelopeInterpolator(betas,pX,NumberofEPoints); |
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| 202 | P11=interpolator2->CubicSplineInterpolation(beta); |
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| 203 | delete interpolator2; |
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| 204 | P1=P10+(RK-(G4double) ik)*(P11-P10); |
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| 205 | |
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| 206 | //Second coefficient |
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| 207 | j = ik; |
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| 208 | for (i=0;i<NumberofEPoints;i++){ |
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| 209 | pX[i]=Q2E[i][j]; |
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| 210 | } |
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| 211 | G4PenelopeInterpolator* interpolator3 = new G4PenelopeInterpolator(betas,pX,NumberofEPoints); |
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| 212 | P20=interpolator3->CubicSplineInterpolation(beta); |
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| 213 | delete interpolator3; |
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| 214 | j++; //(j=ik+1) |
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| 215 | for (i=0;i<NumberofEPoints;i++){ |
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| 216 | pX[i]=Q2E[i][j]; |
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| 217 | } |
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| 218 | G4PenelopeInterpolator* interpolator4 = new G4PenelopeInterpolator(betas,pX,NumberofEPoints); |
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| 219 | P21=interpolator4->CubicSplineInterpolation(beta); |
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| 220 | delete interpolator4; |
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| 221 | P2=P20+(RK-(G4double) ik)*(P21-P20); |
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| 222 | |
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| 223 | //Sampling from the Lorenz-trasformed dipole distributions |
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| 224 | P1=std::min(std::exp(P1)/beta,1.0); |
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| 225 | G4double betap = std::min(std::max(beta*(1.0+P2/beta),0.0),0.9999); |
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| 226 | |
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| 227 | G4double cdt=0,testf=0; |
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| 228 | |
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| 229 | if (G4UniformRand() < P1){ |
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| 230 | do{ |
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| 231 | cdt = 2.0*G4UniformRand()-1.0; |
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| 232 | testf=2.0*G4UniformRand()-(1.0+cdt*cdt); |
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| 233 | }while(testf>0); |
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| 234 | } |
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| 235 | else{ |
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| 236 | do{ |
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| 237 | cdt = 2.0*G4UniformRand()-1.0; |
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| 238 | testf=G4UniformRand()-(1.0-cdt*cdt); |
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| 239 | }while(testf>0); |
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| 240 | } |
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| 241 | cdt = (cdt+betap)/(1.0+betap*cdt); |
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| 242 | return cdt; |
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| 243 | } |
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