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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4StatMFMacroBiNucleon.cc,v 1.7 2008/10/24 22:56:42 dennis Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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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 "G4StatMFMacroBiNucleon.hh" |
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34 | |
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35 | // Operators |
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36 | |
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37 | G4StatMFMacroBiNucleon & G4StatMFMacroBiNucleon:: |
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38 | operator=(const G4StatMFMacroBiNucleon & ) |
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39 | { |
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40 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator= meant to not be accessable"); |
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41 | return *this; |
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42 | } |
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43 | |
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44 | |
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45 | G4bool G4StatMFMacroBiNucleon::operator==(const G4StatMFMacroBiNucleon & ) const |
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46 | { |
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47 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator== meant to not be accessable"); |
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48 | return false; |
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49 | } |
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50 | |
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51 | |
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52 | G4bool G4StatMFMacroBiNucleon::operator!=(const G4StatMFMacroBiNucleon & ) const |
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53 | { |
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54 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMacroBiNucleon::operator!= meant to not be accessable"); |
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55 | return true; |
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56 | } |
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57 | |
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58 | |
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59 | G4double G4StatMFMacroBiNucleon::CalcMeanMultiplicity(const G4double FreeVol, const G4double mu, |
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60 | const G4double nu, const G4double T) |
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61 | { |
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62 | const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T); |
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63 | |
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64 | const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght; |
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65 | |
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66 | const G4double degeneracy = 3.0; |
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67 | |
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68 | const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())* |
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69 | (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)); |
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70 | |
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71 | const G4double BindingE = G4NucleiProperties::GetBindingEnergy(theA,1); //old value was 2.796*MeV |
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72 | G4double exponent = (BindingE + theA*(mu+nu*theZARatio) - |
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73 | Coulomb*theZARatio*theZARatio*std::pow(G4double(theA),5./3.))/T; |
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74 | |
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75 | // To avoid numerical problems |
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76 | if (exponent < -700.0) exponent = -700.0; |
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77 | else if (exponent > 700.0) exponent = 700.0; |
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78 | |
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79 | _MeanMultiplicity = (degeneracy*FreeVol*static_cast<G4double>(theA)*std::sqrt(static_cast<G4double>(theA))/lambda3)* |
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80 | std::exp(exponent); |
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81 | |
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82 | return _MeanMultiplicity; |
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83 | } |
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84 | |
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85 | |
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86 | G4double G4StatMFMacroBiNucleon::CalcEnergy(const G4double T) |
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87 | { |
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88 | const G4double Coulomb = (3./5.)*(elm_coupling/G4StatMFParameters::Getr0())* |
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89 | (1.0 - 1.0/std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)); |
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90 | |
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91 | _Energy = -G4NucleiProperties::GetBindingEnergy(theA,1) + |
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92 | Coulomb * theZARatio * theZARatio * std::pow(G4double(theA),5./3.) + |
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93 | (3./2.) * T; |
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94 | |
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95 | return _Energy; |
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96 | } |
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97 | |
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98 | |
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99 | |
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100 | G4double G4StatMFMacroBiNucleon::CalcEntropy(const G4double T, const G4double FreeVol) |
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101 | { |
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102 | const G4double ThermalWaveLenght = 16.15*fermi/std::sqrt(T); |
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103 | const G4double lambda3 = ThermalWaveLenght*ThermalWaveLenght*ThermalWaveLenght; |
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104 | |
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105 | G4double Entropy = 0.0; |
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106 | if (_MeanMultiplicity > 0.0) |
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107 | // Is this formula correct? |
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108 | Entropy = _MeanMultiplicity*(5./2.+ |
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109 | std::log(3.0*static_cast<G4double>(theA)* |
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110 | std::sqrt(static_cast<G4double>(theA))*FreeVol/ |
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111 | (lambda3*_MeanMultiplicity))); |
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112 | |
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113 | |
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114 | return Entropy; |
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115 | } |
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