1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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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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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: G4IonisParamElm.cc,v 1.14 2006/06/29 19:12:43 gunter Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | // |
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31 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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32 | // |
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33 | // 06-09-04, Update calculated values after any change of ionisation |
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34 | // potential change. V.Ivanchenko |
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35 | // 17-10-02, Fix excitation energy interpolation. V.Ivanchenko |
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36 | // 08-03-01, correct handling of fShellCorrectionVector. M.Maire |
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37 | // 22-11-00, tabulation of ionisation potential from |
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38 | // the ICRU Report N#37. V.Ivanchenko |
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39 | // 09-07-98, data moved from G4Element. M.Maire |
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40 | // |
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41 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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42 | |
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43 | #include "G4IonisParamElm.hh" |
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44 | |
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45 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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46 | |
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47 | G4IonisParamElm::G4IonisParamElm(G4double Z) |
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48 | { |
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49 | if (Z < 1.) G4Exception |
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50 | (" ERROR! It is not allowed to create an Element with Z < 1" ); |
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51 | |
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52 | // some basic functions of the atomic number |
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53 | fZ = Z; |
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54 | fZ3 = std::pow(fZ, 1./3.); |
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55 | fZZ3 = std::pow(fZ*(fZ+1.), 1./3.); |
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56 | flogZ3 = std::log(fZ)/3.; |
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57 | |
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58 | // Parameters for energy loss by ionisation |
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59 | |
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60 | // Mean excitation energy |
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61 | // from "Stopping Powers for Electrons and Positrons" |
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62 | // ICRU Report N#37, 1984 (energy in eV) |
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63 | static double exc[100] = { |
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64 | 21.8, 20.9, 13.3, 15.9, 15.2, 13.0, 11.7, 11.9, 11.5, 13.7, |
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65 | 13.6, 13.0, 12.8, 12.4, 11.5, 11.3, 10.2, 10.4, 10.0, 9.6, |
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66 | 10.3, 10.6, 10.7, 10.7, 10.9, 11.0, 11.0, 11.1, 11.1, 11.0, |
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67 | 10.8, 10.4, 10.5, 10.2, 9.8, 9.8, 9.8, 9.6, 9.7, 9.8, |
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68 | 10.2, 10.1, 10.0, 10.0, 10.0, 10.2, 10.0, 9.8, 10.0, 9.8, |
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69 | 9.5, 9.3, 9.3, 8.9, 8.9, 8.8, 8.8, 8.8, 9.1, 9.1, |
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70 | 9.2, 9.3, 9.2, 9.2, 9.4, 9.5, 9.7, 9.7, 9.8, 9.8, |
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71 | 9.8, 9.8, 9.8, 9.8, 9.8, 9.8, 9.8, 10.1, 10.0, 10.0, |
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72 | 10.0, 10.0, 9.9, 9.9, 9.7, 9.2, 9.5, 9.4, 9.4, 9.4, |
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73 | 9.6, 9.7, 9.7, 9.8, 9.8, 9.8, 9.8, 9.9, 9.9, 9.9 }; |
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74 | |
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75 | G4int iz = (G4int)Z - 1 ; |
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76 | if(0 > iz) iz = 0; |
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77 | else if(99 < iz) iz = 99 ; |
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78 | fMeanExcitationEnergy = fZ * exc[iz] * eV ; |
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79 | |
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80 | |
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81 | fTau0 = 0.1*fZ3*MeV/proton_mass_c2; |
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82 | fTaul = 2.*MeV/proton_mass_c2; |
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83 | |
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84 | // compute the Bethe-Bloch formula for energy = fTaul*particle mass |
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85 | G4double rate = fMeanExcitationEnergy/electron_mass_c2 ; |
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86 | G4double w = fTaul*(fTaul+2.) ; |
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87 | fBetheBlochLow = (fTaul+1.)*(fTaul+1.)*std::log(2.*w/rate)/w - 1. ; |
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88 | fBetheBlochLow = 2.*fZ*twopi_mc2_rcl2*fBetheBlochLow ; |
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89 | |
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90 | fClow = std::sqrt(fTaul)*fBetheBlochLow; |
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91 | fAlow = 6.458040 * fClow/fTau0; |
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92 | G4double Taum = 0.035*fZ3*MeV/proton_mass_c2; |
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93 | fBlow =-3.229020*fClow/(fTau0*std::sqrt(Taum)); |
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94 | |
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95 | // Shell correction factors |
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96 | fShellCorrectionVector = new G4double[3]; //[3] |
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97 | rate = 0.001*fMeanExcitationEnergy/eV; |
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98 | G4double rate2 = rate*rate; |
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99 | /* |
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100 | fShellCorrectionVector[0] = ( 1.10289e5 + 5.14781e8*rate)*rate2 ; |
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101 | fShellCorrectionVector[1] = ( 7.93805e3 - 2.22565e7*rate)*rate2 ; |
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102 | fShellCorrectionVector[2] = (-9.92256e1 + 2.10823e5*rate)*rate2 ; |
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103 | */ |
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104 | fShellCorrectionVector[0] = ( 0.422377 + 3.858019*rate)*rate2 ; |
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105 | fShellCorrectionVector[1] = ( 0.0304043 - 0.1667989*rate)*rate2 ; |
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106 | fShellCorrectionVector[2] = (-0.00038106 + 0.00157955*rate)*rate2 ; |
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107 | } |
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108 | |
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109 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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110 | |
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111 | // Fake default constructor - sets only member data and allocates memory |
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112 | // for usage restricted to object persistency |
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113 | |
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114 | G4IonisParamElm::G4IonisParamElm(__void__&) |
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115 | : fShellCorrectionVector(0) |
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116 | { |
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117 | } |
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118 | |
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119 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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120 | |
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121 | G4IonisParamElm::~G4IonisParamElm() |
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122 | { |
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123 | if (fShellCorrectionVector) delete [] fShellCorrectionVector; |
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124 | } |
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125 | |
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126 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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127 | |
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128 | G4IonisParamElm::G4IonisParamElm(G4IonisParamElm& right) |
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129 | { |
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130 | *this = right; |
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131 | } |
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132 | |
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133 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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134 | |
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135 | const G4IonisParamElm& G4IonisParamElm::operator=(const G4IonisParamElm& right) |
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136 | { |
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137 | if (this != &right) |
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138 | { |
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139 | fZ = right.fZ; |
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140 | fZ3 = right.fZ3; |
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141 | fZZ3 = right.fZZ3; |
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142 | flogZ3 = right.flogZ3; |
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143 | fTau0 = right.fTau0; |
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144 | fTaul = right.fTaul; |
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145 | fBetheBlochLow = right.fBetheBlochLow; |
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146 | fAlow = right.fAlow; |
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147 | fBlow = right.fBlow; |
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148 | fClow = right.fClow; |
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149 | fMeanExcitationEnergy = right.fMeanExcitationEnergy; |
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150 | if (fShellCorrectionVector) delete [] fShellCorrectionVector; |
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151 | fShellCorrectionVector = new G4double[3]; |
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152 | fShellCorrectionVector[0] = right.fShellCorrectionVector[0]; |
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153 | fShellCorrectionVector[1] = right.fShellCorrectionVector[1]; |
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154 | fShellCorrectionVector[2] = right.fShellCorrectionVector[2]; |
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155 | } |
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156 | return *this; |
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157 | } |
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158 | |
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159 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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160 | |
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161 | G4int G4IonisParamElm::operator==(const G4IonisParamElm& right) const |
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162 | { |
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163 | return (this == (G4IonisParamElm *) &right); |
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164 | } |
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165 | |
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166 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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167 | |
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168 | G4int G4IonisParamElm::operator!=(const G4IonisParamElm& right) const |
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169 | { |
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170 | return (this != (G4IonisParamElm *) &right); |
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171 | } |
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172 | |
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173 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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