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2 | // ******************************************************************** |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // 081024 G4NucleiPropertiesTable:: to G4NucleiProperties:: |
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27 | // |
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28 | #include "G4QMDNucleus.hh" |
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29 | #include "G4Proton.hh" |
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30 | #include "G4Neutron.hh" |
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31 | #include "G4NucleiProperties.hh" |
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32 | |
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33 | #include <numeric> |
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34 | |
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35 | G4QMDNucleus::G4QMDNucleus() |
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36 | { |
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37 | G4QMDParameters* parameters = G4QMDParameters::GetInstance(); |
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38 | hbc = parameters->Get_hbc(); |
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39 | } |
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40 | |
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41 | |
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42 | |
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43 | G4QMDNucleus::~G4QMDNucleus() |
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44 | { |
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45 | ; |
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46 | } |
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47 | |
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48 | |
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49 | G4LorentzVector G4QMDNucleus::Get4Momentum() |
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50 | { |
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51 | G4LorentzVector p( 0 ); |
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52 | std::vector< G4QMDParticipant* >::iterator it; |
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53 | for ( it = participants.begin() ; it != participants.end() ; it++ ) |
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54 | p += (*it)->Get4Momentum(); |
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55 | |
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56 | return p; |
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57 | } |
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58 | |
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59 | |
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60 | |
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61 | G4int G4QMDNucleus::GetMassNumber() |
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62 | { |
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63 | |
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64 | G4int A = 0; |
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65 | std::vector< G4QMDParticipant* >::iterator it; |
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66 | for ( it = participants.begin() ; it != participants.end() ; it++ ) |
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67 | { |
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68 | if ( (*it)->GetDefinition() == G4Proton::Proton() |
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69 | || (*it)->GetDefinition() == G4Neutron::Neutron() ) |
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70 | A++; |
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71 | } |
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72 | |
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73 | return A; |
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74 | } |
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75 | |
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76 | |
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77 | |
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78 | G4int G4QMDNucleus::GetAtomicNumber() |
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79 | { |
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80 | G4int Z = 0; |
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81 | std::vector< G4QMDParticipant* >::iterator it; |
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82 | for ( it = participants.begin() ; it != participants.end() ; it++ ) |
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83 | { |
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84 | if ( (*it)->GetDefinition() == G4Proton::Proton() ) |
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85 | Z++; |
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86 | } |
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87 | return Z; |
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88 | } |
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89 | |
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90 | |
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91 | |
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92 | G4double G4QMDNucleus::GetNuclearMass() |
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93 | { |
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94 | |
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95 | G4double mass = G4NucleiProperties::GetNuclearMass( GetMassNumber() , GetAtomicNumber() ); |
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96 | |
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97 | if ( mass == 0.0 ) |
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98 | { |
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99 | |
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100 | G4int Z = GetAtomicNumber(); |
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101 | G4int A = GetMassNumber(); |
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102 | G4int N = A - Z; |
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103 | |
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104 | // Weizsacker-Bethe |
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105 | |
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106 | G4double Av = 16*MeV; |
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107 | G4double As = 17*MeV; |
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108 | G4double Ac = 0.7*MeV; |
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109 | G4double Asym = 23*MeV; |
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110 | |
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111 | G4double BE = Av * A |
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112 | - As * std::pow ( G4double ( A ) , 2.0/3.0 ) |
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113 | - Ac * Z*Z/std::pow ( G4double ( A ) , 1.0/3.0 ) |
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114 | - Asym * ( N - Z )* ( N - Z ) / A; |
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115 | |
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116 | mass = Z * G4Proton::Proton()->GetPDGMass() |
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117 | + N * G4Neutron::Neutron()->GetPDGMass() |
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118 | - BE; |
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119 | |
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120 | } |
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121 | |
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122 | return mass; |
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123 | } |
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124 | |
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125 | |
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126 | |
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127 | void G4QMDNucleus::CalEnergyAndAngularMomentumInCM() |
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128 | { |
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129 | |
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130 | //G4cout << "CalEnergyAndAngularMomentumInCM " << this->GetAtomicNumber() << " " << GetMassNumber() << G4endl; |
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131 | |
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132 | G4double gamma = Get4Momentum().gamma(); |
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133 | G4ThreeVector beta = Get4Momentum().v()/ Get4Momentum().e(); |
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134 | |
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135 | G4ThreeVector pcm0( 0.0 ) ; |
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136 | |
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137 | G4int n = GetTotalNumberOfParticipant(); |
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138 | pcm.resize( n ); |
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139 | |
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140 | for ( G4int i= 0; i < n ; i++ ) |
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141 | { |
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142 | G4ThreeVector p_i = GetParticipant( i )->GetMomentum(); |
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143 | |
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144 | G4double trans = gamma / ( gamma + 1.0 ) * p_i * beta; |
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145 | pcm[i] = p_i - trans*beta; |
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146 | |
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147 | pcm0 += pcm[i]; |
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148 | } |
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149 | |
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150 | pcm0 = pcm0 / double ( n ); |
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151 | |
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152 | //G4cout << "pcm0 " << pcm0 << G4endl; |
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153 | |
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154 | for ( G4int i= 0; i < n ; i++ ) |
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155 | { |
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156 | pcm[i] += -pcm0; |
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157 | //G4cout << "pcm " << i << " " << pcm[i] << G4endl; |
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158 | } |
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159 | |
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160 | |
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161 | G4double tmass = 0; |
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162 | G4ThreeVector rcm0( 0.0 ) ; |
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163 | rcm.resize( n ); |
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164 | es.resize( n ); |
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165 | |
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166 | for ( G4int i= 0; i < n ; i++ ) |
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167 | { |
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168 | G4ThreeVector ri = GetParticipant( i )->GetPosition(); |
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169 | G4double trans = gamma / ( gamma + 1.0 ) * ri * beta; |
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170 | |
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171 | es[i] = std::sqrt ( std::pow ( GetParticipant( i )->GetMass() , 2 ) + pcm[i]*pcm[i] ); |
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172 | |
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173 | rcm[i] = ri + trans*beta; |
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174 | |
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175 | rcm0 += rcm[i]*es[i]; |
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176 | |
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177 | tmass += es[i]; |
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178 | } |
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179 | |
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180 | rcm0 = rcm0/tmass; |
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181 | |
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182 | for ( G4int i= 0; i < n ; i++ ) |
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183 | { |
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184 | rcm[i] += -rcm0; |
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185 | //G4cout << "rcm " << i << " " << rcm[i] << G4endl; |
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186 | } |
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187 | |
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188 | // Angluar momentum |
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189 | |
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190 | G4ThreeVector rl ( 0.0 ); |
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191 | for ( G4int i= 0; i < n ; i++ ) |
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192 | { |
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193 | rl += rcm[i].cross ( pcm[i] ); |
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194 | } |
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195 | |
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196 | jj = int ( std::sqrt ( rl*rl / hbc ) + 0.5 ); |
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197 | |
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198 | |
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199 | // kinetic energy per nucleon in CM |
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200 | |
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201 | G4double totalMass = 0.0; |
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202 | for ( G4int i= 0; i < n ; i++ ) |
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203 | { |
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204 | // following two lines are equivalent |
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205 | //totalMass += GetParticipant( i )->GetDefinition()->GetPDGMass()/GeV; |
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206 | totalMass += GetParticipant( i )->GetMass(); |
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207 | } |
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208 | |
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209 | kineticEnergyPerNucleon = ( std::accumulate ( es.begin() , es.end() , 0.0 ) - totalMass )/n; |
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210 | |
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211 | // Total (not per nucleion ) Binding Energy |
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212 | bindingEnergy = ( std::accumulate ( es.begin() , es.end() , 0.0 ) -totalMass ) + potentialEnergy; |
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213 | |
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214 | //G4cout << "KineticEnergyPerNucleon in GeV " << kineticEnergyPerNucleon << G4endl; |
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215 | //G4cout << "KineticEnergySum in GeV " << std::accumulate ( es.begin() , es.end() , 0.0 ) - totalMass << G4endl; |
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216 | //G4cout << "PotentialEnergy in GeV " << potentialEnergy << G4endl; |
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217 | //G4cout << "BindingEnergy in GeV " << bindingEnergy << G4endl; |
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218 | //G4cout << "G4BindingEnergy in GeV " << G4NucleiProperties::GetBindingEnergy( GetAtomicNumber() , GetMassNumber() )/GeV << G4endl; |
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219 | |
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220 | excitationEnergy = bindingEnergy + G4NucleiProperties::GetBindingEnergy( GetMassNumber() , GetAtomicNumber() )/GeV; |
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221 | //G4cout << "excitationEnergy in GeV " << excitationEnergy << G4endl; |
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222 | if ( excitationEnergy < 0 ) excitationEnergy = 0.0; |
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223 | |
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224 | } |
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