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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4StatMFMacroMultiNucleon.cc,v 1.7 2008/11/19 14:33:31 vnivanch Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02 $ |
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29 | // |
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30 | // Hadronic Process: Nuclear De-excitations |
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31 | // by V. Lara |
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32 | // |
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33 | // Modified: |
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34 | // 25.07.08 I.Pshenichnov (in collaboration with Alexander Botvina and Igor |
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35 | // Mishustin (FIAS, Frankfurt, INR, Moscow and Kurchatov Institute, |
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36 | // Moscow, pshenich@fias.uni-frankfurt.de) fixed computation of the |
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37 | // symmetry energy |
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38 | |
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39 | #include "G4StatMFMacroMultiNucleon.hh" |
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40 | |
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41 | // Default constructor |
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42 | G4StatMFMacroMultiNucleon:: |
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43 | G4StatMFMacroMultiNucleon() : |
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44 | G4VStatMFMacroCluster(0) // Beacuse the def. constr. of base class is private |
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45 | { |
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46 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::default_constructor meant to not be accessable"); |
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47 | } |
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48 | |
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49 | // Copy constructor |
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50 | G4StatMFMacroMultiNucleon:: |
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51 | G4StatMFMacroMultiNucleon(const G4StatMFMacroMultiNucleon & ) : |
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52 | G4VStatMFMacroCluster(0) // Beacuse the def. constr. of base class is private |
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53 | { |
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54 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::copy_constructor meant to not be accessable"); |
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55 | } |
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56 | |
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57 | // Operators |
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58 | |
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59 | G4StatMFMacroMultiNucleon & G4StatMFMacroMultiNucleon:: |
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60 | operator=(const G4StatMFMacroMultiNucleon & ) |
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61 | { |
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62 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator= meant to not be accessable"); |
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63 | return *this; |
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64 | } |
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65 | |
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66 | |
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67 | G4bool G4StatMFMacroMultiNucleon::operator==(const G4StatMFMacroMultiNucleon & ) const |
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68 | { |
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69 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator== meant to not be accessable"); |
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70 | return false; |
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71 | } |
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72 | |
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73 | |
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74 | G4bool G4StatMFMacroMultiNucleon::operator!=(const G4StatMFMacroMultiNucleon & ) const |
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75 | { |
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76 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroMultiNucleon::operator!= meant to not be accessable"); |
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77 | return true; |
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78 | } |
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79 | |
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80 | |
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81 | |
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82 | G4double G4StatMFMacroMultiNucleon::CalcMeanMultiplicity(const G4double FreeVol, const G4double mu, |
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83 | const G4double nu, const G4double T) |
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84 | { |
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85 | const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T); |
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86 | |
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87 | const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght; |
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88 | |
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89 | const G4double A23 = std::pow(static_cast<G4double>(theA),2./3.); |
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90 | |
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91 | const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())* |
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92 | (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)); |
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93 | |
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94 | G4double exponent = (mu + nu*theZARatio+ G4StatMFParameters::GetE0() + T*T/_InvLevelDensity |
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95 | - G4StatMFParameters::GetGamma0()*(1.0 - 2.0*theZARatio)* |
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96 | (1.0 - 2.0*theZARatio))*theA |
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97 | - G4StatMFParameters::Beta(T)*A23 - Coulomb*theZARatio*theZARatio*A23*theA; |
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98 | |
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99 | exponent /= T; |
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100 | |
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101 | if (exponent > 30.0) exponent = 30.0; |
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102 | |
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103 | _MeanMultiplicity = std::max((FreeVol * static_cast<G4double>(theA) * |
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104 | std::sqrt(static_cast<G4double>(theA))/lambda3) * |
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105 | std::exp(exponent),1.0e-30); |
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106 | return _MeanMultiplicity; |
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107 | } |
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108 | |
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109 | |
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110 | G4double G4StatMFMacroMultiNucleon::CalcZARatio(const G4double nu) |
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111 | { |
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112 | const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())* |
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113 | (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)); |
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114 | |
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115 | G4double den = 8.0*G4StatMFParameters::GetGamma0()+2.0*Coulomb*std::pow(static_cast<G4double>(theA),2./3.); |
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116 | G4double num = 4.0*G4StatMFParameters::GetGamma0()+nu; |
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117 | |
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118 | return theZARatio = num/den; |
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119 | |
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120 | |
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121 | } |
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122 | |
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123 | |
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124 | |
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125 | G4double G4StatMFMacroMultiNucleon::CalcEnergy(const G4double T) |
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126 | { |
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127 | const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())* |
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128 | (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)); |
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129 | |
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130 | const G4double A23 = std::pow(static_cast<G4double>(theA),2./3.); |
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131 | |
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132 | // Volume term |
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133 | G4double EVol = static_cast<G4double>(theA) * (T*T/_InvLevelDensity - G4StatMFParameters::GetE0()); |
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134 | |
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135 | // Symmetry term |
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136 | G4double ESym = static_cast<G4double>(theA) * G4StatMFParameters::GetGamma0() *(1. - 2.* theZARatio) * (1. - 2.* theZARatio); |
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137 | |
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138 | // Surface term |
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139 | G4double ESurf = A23*(G4StatMFParameters::Beta(T) - T*G4StatMFParameters::DBetaDT(T)); |
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140 | |
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141 | // Coulomb term |
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142 | G4double ECoul = Coulomb*A23*static_cast<G4double>(theA)*theZARatio*theZARatio; |
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143 | |
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144 | // Translational term |
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145 | G4double ETrans = (3./2.)*T; |
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146 | |
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147 | |
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148 | return _Energy = EVol + ESurf + ECoul + ETrans + ESym; |
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149 | } |
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150 | |
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151 | |
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152 | G4double G4StatMFMacroMultiNucleon::CalcEntropy(const G4double T, const G4double FreeVol) |
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153 | { |
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154 | const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T); |
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155 | const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght; |
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156 | |
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157 | G4double Entropy = 0.0; |
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158 | if (_MeanMultiplicity > 0.0) { |
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159 | // Volume term |
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160 | G4double SV = 2.0*static_cast<G4double>(theA)*T/_InvLevelDensity; |
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161 | |
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162 | // Surface term |
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163 | G4double SS = -G4StatMFParameters::DBetaDT(T)*std::pow(static_cast<G4double>(theA),2./3.); |
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164 | |
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165 | // Translational term |
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166 | G4double ST = (5./2.)+std::log(FreeVol * std::sqrt(static_cast<G4double>(theA)) * |
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167 | static_cast<G4double>(theA)/(lambda3*_MeanMultiplicity)); |
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168 | |
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169 | |
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170 | Entropy = _MeanMultiplicity*(SV + SS + ST); |
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171 | } |
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172 | |
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173 | |
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174 | return Entropy; |
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175 | } |
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