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 | // |
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27 | // $Id: G4StatMFFragment.cc,v 1.7 2008/07/25 11:20:47 vnivanch Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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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 | #include "G4StatMFFragment.hh" |
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34 | #include "G4HadronicException.hh" |
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35 | |
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36 | |
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37 | // Copy constructor |
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38 | G4StatMFFragment::G4StatMFFragment(const G4StatMFFragment & ) |
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39 | { |
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40 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::copy_constructor meant to not be accessable"); |
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41 | } |
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42 | |
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43 | // Operators |
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44 | |
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45 | G4StatMFFragment & G4StatMFFragment:: |
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46 | operator=(const G4StatMFFragment & ) |
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47 | { |
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48 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator= meant to not be accessable"); |
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49 | return *this; |
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50 | } |
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51 | |
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52 | |
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53 | G4bool G4StatMFFragment::operator==(const G4StatMFFragment & ) const |
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54 | { |
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55 | // throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator== meant to not be accessable"); |
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56 | return false; |
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57 | } |
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58 | |
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59 | |
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60 | G4bool G4StatMFFragment::operator!=(const G4StatMFFragment & ) const |
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61 | { |
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62 | // throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator!= meant to not be accessable"); |
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63 | return true; |
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64 | } |
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65 | |
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66 | |
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67 | |
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68 | G4double G4StatMFFragment::GetCoulombEnergy(void) const |
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69 | { |
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70 | if (theZ <= 0.1) return 0.0; |
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71 | G4double Coulomb = (3./5.)*(elm_coupling*theZ*theZ)* |
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72 | std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)/ |
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73 | (G4StatMFParameters::Getr0()*std::pow(theA,1./3.)); |
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74 | |
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75 | return Coulomb; |
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76 | } |
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77 | |
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78 | |
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79 | G4double G4StatMFFragment::GetEnergy(const G4double T) const |
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80 | { |
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81 | if (theA < 1 || theZ < 0 || theZ > theA) { |
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82 | G4cerr << "G4StatMFFragment::GetEnergy: A = " << theA |
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83 | << ", Z = " << theZ << G4endl; |
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84 | throw G4HadronicException(__FILE__, __LINE__, |
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85 | "G4StatMFFragment::GetEnergy: Wrong values for A and Z!"); |
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86 | } |
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87 | G4double BulkEnergy = G4NucleiProperties::GetMassExcess(static_cast<G4int>(theA), |
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88 | static_cast<G4int>(theZ)); |
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89 | |
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90 | if (theA < 4) return BulkEnergy - GetCoulombEnergy(); |
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91 | |
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92 | G4double SurfaceEnergy; |
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93 | if (G4StatMFParameters::DBetaDT(T) == 0.0) SurfaceEnergy = 0.0; |
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94 | else SurfaceEnergy = (5./2.)*std::pow(theA,2.0/3.0)*T*T* |
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95 | G4StatMFParameters::GetBeta0()/ |
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96 | (G4StatMFParameters::GetCriticalTemp()* |
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97 | G4StatMFParameters::GetCriticalTemp()); |
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98 | |
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99 | |
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100 | G4double ExchangeEnergy = theA*T*T/GetInvLevelDensity(); |
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101 | if (theA != 4) ExchangeEnergy += SurfaceEnergy; |
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102 | |
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103 | return BulkEnergy + ExchangeEnergy - GetCoulombEnergy(); |
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104 | |
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105 | } |
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106 | |
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107 | |
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108 | G4double G4StatMFFragment::GetInvLevelDensity(void) const |
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109 | { |
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110 | // Calculate Inverse Density Level |
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111 | // Epsilon0*(1 + 3 /(Af - 1)) |
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112 | if (theA == 1) return 0.0; |
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113 | else return |
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114 | G4StatMFParameters::GetEpsilon0()*(1.0+3.0/(theA - 1.0)); |
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115 | } |
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116 | |
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117 | |
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118 | |
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119 | G4Fragment * G4StatMFFragment::GetFragment(const G4double T) |
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120 | { |
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121 | G4double U = CalcExcitationEnergy(T); |
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122 | |
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123 | G4double M = GetNuclearMass(); |
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124 | |
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125 | G4LorentzVector FourMomentum(_momentum,std::sqrt(_momentum.mag2()+(M+U)*(M+U))); |
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126 | |
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127 | G4Fragment * theFragment = new G4Fragment(static_cast<G4int>(theA),static_cast<G4int>(theZ),FourMomentum); |
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128 | |
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129 | return theFragment; |
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130 | } |
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131 | |
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132 | |
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133 | G4double G4StatMFFragment::CalcExcitationEnergy(const G4double T) |
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134 | { |
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135 | if (theA <= 3) return 0.0; |
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136 | |
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137 | G4double BulkEnergy = theA*T*T/GetInvLevelDensity(); |
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138 | |
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139 | // if it is an alpha particle: done |
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140 | if (theA == 4) return BulkEnergy; |
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141 | |
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142 | // Term connected with surface energy |
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143 | G4double SurfaceEnergy = 0.0; |
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144 | if (std::abs(G4StatMFParameters::DBetaDT(T)) > 1.0e-20) |
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145 | // SurfaceEnergy = (5./2.)*std::pow(theA,2.0/3.0)*T*T*G4StatMFParameters::GetBeta0()/ |
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146 | // (G4StatMFParameters::GetCriticalTemp()*G4StatMFParameters::GetCriticalTemp()); |
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147 | SurfaceEnergy = (5./2.)*std::pow(theA,2.0/3.0)*(G4StatMFParameters::Beta(T) - |
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148 | T*G4StatMFParameters::DBetaDT(T) - G4StatMFParameters::GetBeta0()); |
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149 | |
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150 | return BulkEnergy + SurfaceEnergy; |
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151 | } |
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152 | |
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153 | |
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