1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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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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16 | // * for the full disclaimer and the limitation of liability. * |
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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: G4NucleiProperties.cc,v 1.18 2008/11/06 13:17:36 kurasige Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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29 | // |
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30 | // |
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31 | // ------------------------------------------------------------ |
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32 | // GEANT 4 class header file |
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33 | // |
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34 | // ------------------------------------------------------------ |
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35 | // |
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36 | // Hadronic Process: Nuclear De-excitations |
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37 | // by V. Lara (Oct 1998) |
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38 | // Migrate into particles category by H.Kurashige (17 Nov. 98) |
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39 | // Added Shell-Pairing corrections to the Cameron mass |
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40 | // excess formula by V.Lara (9 May 99) |
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41 | |
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42 | |
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43 | #include "G4NucleiProperties.hh" |
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44 | |
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45 | G4bool G4NucleiProperties::isIntialized = false; |
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46 | |
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47 | G4double G4NucleiProperties::mass_proton = -1.; |
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48 | G4double G4NucleiProperties::mass_neutron = -1.; |
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49 | G4double G4NucleiProperties::mass_deuteron = -1.; |
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50 | G4double G4NucleiProperties::mass_triton = -1.; |
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51 | G4double G4NucleiProperties::mass_alpha = -1.; |
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52 | G4double G4NucleiProperties::mass_He3 = -1.; |
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53 | G4double G4NucleiProperties::electronMass[MaxZ]; |
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54 | |
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55 | G4double G4NucleiProperties::AtomicMass(G4double A, G4double Z) |
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56 | { |
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57 | const G4double hydrogen_mass_excess = G4NucleiPropertiesTable::GetMassExcess(1,1); |
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58 | const G4double neutron_mass_excess = G4NucleiPropertiesTable::GetMassExcess(0,1); |
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59 | |
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60 | G4double mass = |
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61 | (A-Z)*neutron_mass_excess + Z*hydrogen_mass_excess - BindingEnergy(A,Z) + A*amu_c2; |
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62 | |
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63 | return mass; |
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64 | } |
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65 | |
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66 | G4double G4NucleiProperties::BindingEnergy(G4double A, G4double Z) |
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67 | { |
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68 | // |
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69 | // Weitzsaecker's Mass formula |
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70 | // |
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71 | G4int Npairing = G4int(A-Z)%2; // pairing |
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72 | G4int Zpairing = G4int(Z)%2; |
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73 | G4double binding = |
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74 | - 15.67*A // nuclear volume |
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75 | + 17.23*std::pow(A,2./3.) // surface energy |
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76 | + 93.15*((A/2.-Z)*(A/2.-Z))/A // asymmetry |
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77 | + 0.6984523*Z*Z*std::pow(A,-1./3.); // coulomb |
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78 | if( Npairing == Zpairing ) binding += (Npairing+Zpairing-1) * 12.0 / std::sqrt(A); // pairing |
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79 | |
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80 | return -binding*MeV; |
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81 | } |
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82 | |
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83 | |
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84 | G4double G4NucleiProperties::GetNuclearMass(const G4double A, const G4double Z) |
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85 | { |
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86 | if (!isIntialized) { |
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87 | isIntialized = true; |
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88 | G4ParticleDefinition * nucleus = 0; |
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89 | nucleus = G4ParticleTable::GetParticleTable()->FindParticle("proton"); // proton |
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90 | if (nucleus!=0) mass_proton = nucleus->GetPDGMass(); |
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91 | nucleus = G4ParticleTable::GetParticleTable()->FindParticle("neutron"); // neutron |
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92 | if (nucleus!=0) mass_neutron = nucleus->GetPDGMass(); |
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93 | nucleus = G4ParticleTable::GetParticleTable()->FindParticle("deuteron"); // deuteron |
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94 | if (nucleus!=0) mass_deuteron = nucleus->GetPDGMass(); |
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95 | nucleus = G4ParticleTable::GetParticleTable()->FindParticle("triton"); // triton |
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96 | if (nucleus!=0) mass_triton = nucleus->GetPDGMass(); |
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97 | nucleus = G4ParticleTable::GetParticleTable()->FindParticle("alpha"); // alpha |
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98 | if (nucleus!=0) mass_alpha = nucleus->GetPDGMass(); |
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99 | nucleus = G4ParticleTable::GetParticleTable()->FindParticle("He3"); // He3 |
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100 | if (nucleus!=0) mass_He3 = nucleus->GetPDGMass(); |
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101 | |
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102 | for (int iz=1; iz<MaxZ; iz+=1){ |
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103 | electronMass[iz] = iz*electron_mass_c2 |
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104 | - 1.433e-5*MeV*std::pow(G4double(iz),2.39); ; |
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105 | } |
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106 | } |
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107 | |
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108 | if (A < 1 || Z < 0 || Z > A) { |
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109 | #ifdef G4VERBOSE |
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110 | if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) { |
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111 | G4cout << "G4NucleiProperties::GetNuclearMass: Wrong values for A = " << A |
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112 | << " and Z = " << Z << G4endl; |
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113 | } |
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114 | #endif |
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115 | return 0.0; |
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116 | } else { |
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117 | G4double mass= -1.; |
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118 | if ( (Z<=2) ) { |
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119 | if ( (Z==1)&&(A==1) ) { |
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120 | mass = mass_proton; |
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121 | } else if ( (Z==0)&&(A==1) ) { |
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122 | mass = mass_neutron; |
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123 | } else if ( (Z==1)&&(A==2) ) { |
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124 | mass = mass_deuteron; |
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125 | } else if ( (Z==1)&&(A==3) ) { |
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126 | mass = mass_triton; |
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127 | } else if ( (Z==2)&&(A==4) ) { |
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128 | mass = mass_alpha; |
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129 | } else if ( (Z==2)&&(A==3) ) { |
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130 | mass = mass_He3; |
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131 | } |
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132 | } |
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133 | if (mass < 0.) { |
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134 | if (Z >= MaxZ) { |
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135 | mass = GetAtomicMass(A,Z) - Z*electron_mass_c2 + 1.433e-5*MeV*std::pow(Z,2.39); |
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136 | } else { |
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137 | mass = GetAtomicMass(A,Z) - electronMass[G4int(Z)]; |
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138 | } |
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139 | } |
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140 | if (mass < 0.) mass = 0.0; |
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141 | return mass; |
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142 | } |
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143 | } |
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144 | |
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145 | G4bool G4NucleiProperties::IsInStableTable(const G4double A, const G4double Z) |
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146 | { |
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147 | if (Z < 0 || Z > A) { |
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148 | #ifdef G4VERBOSE |
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149 | if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) { |
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150 | G4cout << "G4NucleiProperties::IsInStableTable: Wrong values for A = " |
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151 | << A << " and Z = " << Z << G4endl; |
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152 | } |
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153 | #endif |
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154 | return false; |
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155 | |
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156 | } else { |
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157 | G4int iA = G4int(A); |
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158 | G4int iZ = G4int(Z); |
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159 | return G4NucleiPropertiesTable::IsInTable(iZ,iA); |
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160 | } |
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161 | } |
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162 | |
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163 | G4double G4NucleiProperties::GetMassExcess(const G4double A, const G4double Z) |
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164 | { |
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165 | G4int iA = G4int(A); |
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166 | G4int iZ = G4int(Z); |
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167 | return GetMassExcess(iA,iZ); |
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168 | } |
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169 | |
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170 | G4double G4NucleiProperties::GetMassExcess(const G4int A, const G4int Z) |
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171 | { |
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172 | if (A < 1 || Z < 0 || Z > A) { |
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173 | #ifdef G4VERBOSE |
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174 | if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) { |
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175 | G4cout << "G4NucleiProperties::GetMassExccess: Wrong values for A = " |
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176 | << A << " and Z = " << Z << G4endl; |
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177 | } |
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178 | #endif |
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179 | return 0.0; |
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180 | |
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181 | } else { |
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182 | |
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183 | if (G4NucleiPropertiesTable::IsInTable(Z,A)){ |
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184 | return G4NucleiPropertiesTable::GetMassExcess(Z,A); |
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185 | } else if (G4NucleiPropertiesTheoreticalTable::IsInTable(Z,A)){ |
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186 | return G4NucleiPropertiesTheoreticalTable::GetMassExcess(Z,A); |
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187 | } else { |
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188 | return MassExcess(A,Z); |
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189 | } |
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190 | } |
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191 | |
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192 | } |
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193 | |
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194 | |
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195 | G4double G4NucleiProperties::GetAtomicMass(const G4double A, const G4double Z) |
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196 | { |
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197 | if (Z < 0 || Z > A) { |
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198 | #ifdef G4VERBOSE |
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199 | if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) { |
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200 | G4cout << "G4NucleiProperties::GetAtomicMass: Wrong values for A = " |
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201 | << A << " and Z = " << Z << G4endl; |
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202 | } |
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203 | #endif |
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204 | return 0.0; |
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205 | |
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206 | } else if (std::abs(A - G4int(A)) > 1.e-10) { |
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207 | return AtomicMass(A,Z); |
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208 | |
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209 | } else { |
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210 | G4int iA = G4int(A); |
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211 | G4int iZ = G4int(Z); |
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212 | if (G4NucleiPropertiesTable::IsInTable(iZ,iA)) { |
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213 | return G4NucleiPropertiesTable::GetAtomicMass(iZ,iA); |
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214 | } else if (G4NucleiPropertiesTheoreticalTable::IsInTable(iZ,iA)){ |
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215 | return G4NucleiPropertiesTheoreticalTable::GetAtomicMass(iZ,iA); |
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216 | } else { |
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217 | return AtomicMass(A,Z); |
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218 | } |
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219 | } |
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220 | } |
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221 | |
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222 | G4double G4NucleiProperties::GetBindingEnergy(const G4double A, const G4double Z) |
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223 | { |
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224 | G4int iA = G4int(A); |
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225 | G4int iZ = G4int(Z); |
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226 | return GetBindingEnergy(iA,iZ); |
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227 | } |
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228 | |
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229 | G4double G4NucleiProperties::GetBindingEnergy(const G4int A, const G4int Z) |
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230 | { |
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231 | if (A < 1 || Z < 0 || Z > A) { |
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232 | #ifdef G4VERBOSE |
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233 | if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) { |
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234 | G4cout << "G4NucleiProperties::GetMassExccess: Wrong values for A = " |
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235 | << A << " and Z = " << Z << G4endl; |
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236 | } |
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237 | #endif |
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238 | return 0.0; |
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239 | |
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240 | } else { |
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241 | if (G4NucleiPropertiesTable::IsInTable(Z,A)) { |
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242 | return G4NucleiPropertiesTable::GetBindingEnergy(Z,A); |
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243 | } else if (G4NucleiPropertiesTheoreticalTable::IsInTable(Z,A)) { |
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244 | return G4NucleiPropertiesTheoreticalTable::GetBindingEnergy(Z,A); |
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245 | }else { |
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246 | return BindingEnergy(A,Z); |
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247 | } |
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248 | |
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249 | } |
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250 | } |
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251 | |
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252 | |
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253 | G4double G4NucleiProperties::MassExcess(G4double A, G4double Z) |
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254 | { |
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255 | return GetAtomicMass(A,Z) - A*amu_c2; |
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256 | } |
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257 | |
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