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15 | // * use. Please see the license in the file LICENSE and URL above * |
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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: G4ICRU49NuclearStoppingModel.cc,v 1.2 2009/11/10 19:25:47 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // ------------------------------------------------------------------- |
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30 | // |
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31 | // GEANT4 Class file |
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32 | // |
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33 | // |
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34 | // File name: G4ICRU49NuclearStoppingModel |
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35 | // |
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36 | // Author: V.Ivanchenko |
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37 | // |
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38 | // Creation date: 09.04.2008 from G4MuMscModel |
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39 | // |
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40 | // Modifications: |
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41 | // |
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42 | // |
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43 | // Class Description: |
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44 | // |
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45 | // Implementation of the model of ICRU'49 nuclear stopping |
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46 | |
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47 | // ------------------------------------------------------------------- |
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48 | // |
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49 | |
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50 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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51 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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52 | |
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53 | #include "G4ICRU49NuclearStoppingModel.hh" |
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54 | #include "Randomize.hh" |
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55 | #include "G4LossTableManager.hh" |
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56 | #include "G4ParticleChangeForLoss.hh" |
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57 | #include "G4ElementVector.hh" |
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58 | #include "G4ProductionCutsTable.hh" |
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59 | #include "G4Step.hh" |
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60 | #include "G4Pow.hh" |
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61 | |
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62 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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63 | |
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64 | G4double G4ICRU49NuclearStoppingModel::ad[] = {0.0}; |
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65 | G4double G4ICRU49NuclearStoppingModel::ed[] = {0.0}; |
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66 | |
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67 | using namespace std; |
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68 | |
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69 | G4ICRU49NuclearStoppingModel::G4ICRU49NuclearStoppingModel(const G4String& nam) |
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70 | : G4VEmModel(nam),lossFlucFlag(false) |
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71 | { |
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72 | theZieglerFactor = eV*cm2*1.0e-15; |
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73 | g4pow = G4Pow::GetInstance(); |
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74 | if(ad[0] == 0.0) InitialiseNuclearStopping(); |
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75 | } |
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76 | |
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77 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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78 | |
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79 | G4ICRU49NuclearStoppingModel::~G4ICRU49NuclearStoppingModel() |
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80 | {} |
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81 | |
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82 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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83 | |
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84 | void G4ICRU49NuclearStoppingModel::Initialise(const G4ParticleDefinition*, |
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85 | const G4DataVector&) |
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86 | {} |
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87 | |
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88 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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89 | |
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90 | void |
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91 | G4ICRU49NuclearStoppingModel::SampleSecondaries(std::vector<G4DynamicParticle*>*, |
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92 | const G4MaterialCutsCouple*, |
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93 | const G4DynamicParticle*, |
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94 | G4double, G4double) |
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95 | {} |
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96 | |
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97 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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98 | |
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99 | G4double |
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100 | G4ICRU49NuclearStoppingModel::ComputeDEDXPerVolume(const G4Material* mat, |
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101 | const G4ParticleDefinition* p, |
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102 | G4double kinEnergy, |
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103 | G4double) |
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104 | { |
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105 | G4double nloss = 0.0; |
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106 | if(kinEnergy <= 0.0) return nloss; |
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107 | |
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108 | // projectile |
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109 | G4double m1 = p->GetPDGMass(); |
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110 | G4double z1 = std::fabs(p->GetPDGCharge()/eplus); |
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111 | |
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112 | if(kinEnergy*proton_mass_c2/m1 > z1*z1*100.*MeV) return nloss; |
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113 | |
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114 | // Projectile nucleus |
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115 | m1 /= amu_c2; |
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116 | |
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117 | // loop for the elements in the material |
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118 | G4int numberOfElements = mat->GetNumberOfElements(); |
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119 | const G4ElementVector* theElementVector = mat->GetElementVector(); |
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120 | const G4double* atomDensity = mat->GetAtomicNumDensityVector(); |
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121 | |
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122 | for (G4int iel=0; iel<numberOfElements; iel++) { |
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123 | const G4Element* element = (*theElementVector)[iel] ; |
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124 | G4double z2 = element->GetZ(); |
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125 | G4double m2 = element->GetA()*mole/g ; |
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126 | nloss += (NuclearStoppingPower(kinEnergy, z1, z2, m1, m2)) |
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127 | * atomDensity[iel] ; |
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128 | } |
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129 | nloss *= theZieglerFactor; |
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130 | return nloss; |
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131 | } |
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132 | |
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133 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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134 | |
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135 | G4double |
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136 | G4ICRU49NuclearStoppingModel::NuclearStoppingPower(G4double kineticEnergy, |
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137 | G4double z1, G4double z2, |
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138 | G4double m1, G4double m2) |
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139 | { |
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140 | G4double energy = kineticEnergy/keV ; // energy in keV |
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141 | G4double nloss = 0.0; |
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142 | G4double z12 = z1*z2; |
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143 | G4int iz1 = G4int(z1); |
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144 | G4int iz2 = G4int(z2); |
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145 | |
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146 | G4double rm; |
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147 | if(iz1 > 1) rm = (m1 + m2) * ( g4pow->Z23(iz1) + g4pow->Z23(iz2) ); |
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148 | else rm = (m1 + m2) * g4pow->Z13(iz2); |
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149 | |
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150 | G4double er = 32.536 * m2 * energy / ( z12 * rm ) ; // reduced energy |
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151 | |
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152 | if (er >= ed[0]) nloss = ad[0]; |
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153 | else { |
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154 | // the table is inverse in energy |
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155 | for (G4int i=102; i>=0; --i) |
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156 | { |
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157 | if (er <= ed[i]) { |
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158 | nloss = (ad[i] - ad[i+1])*(er - ed[i+1])/(ed[i] - ed[i+1]) + ad[i+1]; |
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159 | break; |
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160 | } |
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161 | } |
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162 | } |
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163 | |
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164 | // Stragling |
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165 | if(lossFlucFlag) { |
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166 | // G4double sig = 4.0 * m1 * m2 / ((m1 + m2)*(m1 + m2)* |
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167 | // (4.0 + 0.197*std::pow(er,-1.6991)+6.584*std::pow(er,-1.0494))) ; |
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168 | G4double sig = 4.0 * m1 * m2 / ((m1 + m2)*(m1 + m2)* |
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169 | (4.0 + 0.197/(er*er) + 6.584/er)); |
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170 | |
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171 | nloss *= G4RandGauss::shoot(1.0,sig) ; |
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172 | lossFlucFlag = false; |
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173 | } |
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174 | |
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175 | nloss *= 8.462 * z12 * m1 / rm ; // Return to [ev/(10^15 atoms/cm^2] |
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176 | |
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177 | if ( nloss < 0.0) nloss = 0.0 ; |
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178 | |
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179 | return nloss; |
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180 | } |
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181 | |
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182 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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183 | |
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184 | void G4ICRU49NuclearStoppingModel::InitialiseNuclearStopping() |
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185 | { |
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186 | const G4double nuca[104][2] = { |
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187 | { 1.0E+8, 5.831E-8}, |
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188 | { 8.0E+7, 7.288E-8}, |
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189 | { 6.0E+7, 9.719E-8}, |
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190 | { 5.0E+7, 1.166E-7}, |
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191 | { 4.0E+7, 1.457E-7}, |
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192 | { 3.0E+7, 1.942E-7}, |
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193 | { 2.0E+7, 2.916E-7}, |
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194 | { 1.5E+7, 3.887E-7}, |
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195 | |
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196 | { 1.0E+7, 5.833E-7}, |
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197 | { 8.0E+6, 7.287E-7}, |
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198 | { 6.0E+6, 9.712E-7}, |
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199 | { 5.0E+6, 1.166E-6}, |
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200 | { 4.0E+6, 1.457E-6}, |
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201 | { 3.0E+6, 1.941E-6}, |
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202 | { 2.0E+6, 2.911E-6}, |
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203 | { 1.5E+6, 3.878E-6}, |
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204 | |
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205 | { 1.0E+6, 5.810E-6}, |
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206 | { 8.0E+5, 7.262E-6}, |
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207 | { 6.0E+5, 9.663E-6}, |
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208 | { 5.0E+5, 1.157E-5}, |
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209 | { 4.0E+5, 1.442E-5}, |
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210 | { 3.0E+5, 1.913E-5}, |
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211 | { 2.0E+5, 2.845E-5}, |
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212 | { 1.5E+5, 3.762E-5}, |
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213 | |
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214 | { 1.0E+5, 5.554E-5}, |
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215 | { 8.0E+4, 6.866E-5}, |
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216 | { 6.0E+4, 9.020E-5}, |
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217 | { 5.0E+4, 1.070E-4}, |
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218 | { 4.0E+4, 1.319E-4}, |
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219 | { 3.0E+4, 1.722E-4}, |
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220 | { 2.0E+4, 2.499E-4}, |
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221 | { 1.5E+4, 3.248E-4}, |
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222 | |
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223 | { 1.0E+4, 4.688E-4}, |
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224 | { 8.0E+3, 5.729E-4}, |
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225 | { 6.0E+3, 7.411E-4}, |
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226 | { 5.0E+3, 8.718E-4}, |
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227 | { 4.0E+3, 1.063E-3}, |
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228 | { 3.0E+3, 1.370E-3}, |
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229 | { 2.0E+3, 1.955E-3}, |
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230 | { 1.5E+3, 2.511E-3}, |
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231 | |
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232 | { 1.0E+3, 3.563E-3}, |
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233 | { 8.0E+2, 4.314E-3}, |
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234 | { 6.0E+2, 5.511E-3}, |
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235 | { 5.0E+2, 6.430E-3}, |
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236 | { 4.0E+2, 7.756E-3}, |
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237 | { 3.0E+2, 9.855E-3}, |
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238 | { 2.0E+2, 1.375E-2}, |
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239 | { 1.5E+2, 1.736E-2}, |
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240 | |
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241 | { 1.0E+2, 2.395E-2}, |
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242 | { 8.0E+1, 2.850E-2}, |
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243 | { 6.0E+1, 3.552E-2}, |
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244 | { 5.0E+1, 4.073E-2}, |
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245 | { 4.0E+1, 4.802E-2}, |
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246 | { 3.0E+1, 5.904E-2}, |
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247 | { 1.5E+1, 9.426E-2}, |
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248 | |
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249 | { 1.0E+1, 1.210E-1}, |
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250 | { 8.0E+0, 1.377E-1}, |
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251 | { 6.0E+0, 1.611E-1}, |
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252 | { 5.0E+0, 1.768E-1}, |
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253 | { 4.0E+0, 1.968E-1}, |
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254 | { 3.0E+0, 2.235E-1}, |
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255 | { 2.0E+0, 2.613E-1}, |
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256 | { 1.5E+0, 2.871E-1}, |
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257 | |
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258 | { 1.0E+0, 3.199E-1}, |
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259 | { 8.0E-1, 3.354E-1}, |
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260 | { 6.0E-1, 3.523E-1}, |
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261 | { 5.0E-1, 3.609E-1}, |
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262 | { 4.0E-1, 3.693E-1}, |
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263 | { 3.0E-1, 3.766E-1}, |
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264 | { 2.0E-1, 3.803E-1}, |
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265 | { 1.5E-1, 3.788E-1}, |
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266 | |
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267 | { 1.0E-1, 3.711E-1}, |
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268 | { 8.0E-2, 3.644E-1}, |
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269 | { 6.0E-2, 3.530E-1}, |
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270 | { 5.0E-2, 3.444E-1}, |
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271 | { 4.0E-2, 3.323E-1}, |
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272 | { 3.0E-2, 3.144E-1}, |
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273 | { 2.0E-2, 2.854E-1}, |
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274 | { 1.5E-2, 2.629E-1}, |
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275 | |
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276 | { 1.0E-2, 2.298E-1}, |
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277 | { 8.0E-3, 2.115E-1}, |
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278 | { 6.0E-3, 1.883E-1}, |
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279 | { 5.0E-3, 1.741E-1}, |
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280 | { 4.0E-3, 1.574E-1}, |
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281 | { 3.0E-3, 1.372E-1}, |
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282 | { 2.0E-3, 1.116E-1}, |
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283 | { 1.5E-3, 9.559E-2}, |
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284 | |
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285 | { 1.0E-3, 7.601E-2}, |
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286 | { 8.0E-4, 6.668E-2}, |
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287 | { 6.0E-4, 5.605E-2}, |
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288 | { 5.0E-4, 5.008E-2}, |
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289 | { 4.0E-4, 4.352E-2}, |
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290 | { 3.0E-4, 3.617E-2}, |
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291 | { 2.0E-4, 2.768E-2}, |
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292 | { 1.5E-4, 2.279E-2}, |
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293 | |
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294 | { 1.0E-4, 1.723E-2}, |
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295 | { 8.0E-5, 1.473E-2}, |
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296 | { 6.0E-5, 1.200E-2}, |
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297 | { 5.0E-5, 1.052E-2}, |
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298 | { 4.0E-5, 8.950E-3}, |
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299 | { 3.0E-5, 7.246E-3}, |
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300 | { 2.0E-5, 5.358E-3}, |
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301 | { 1.5E-5, 4.313E-3}, |
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302 | { 0.0, 3.166E-3} |
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303 | }; |
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304 | |
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305 | for(G4int i=0; i<104; ++i) { |
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306 | ed[i] = nuca[i][0]; |
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307 | ad[i] = nuca[i][1]; |
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308 | } |
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309 | } |
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310 | |
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311 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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