1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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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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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 1.8 2009/06/10 13:32:36 mantero Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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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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