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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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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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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 | // $Id: G4ICRU73QOModel.hh,v 1.3 2010/06/04 09:09:31 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-04-beta-cand-01 $ |
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28 | // |
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29 | // ------------------------------------------------------------------- |
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30 | // |
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31 | // GEANT4 Class header file |
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32 | // |
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33 | // |
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34 | // File name: G4ICRU73QOModel |
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35 | // |
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36 | // Author: Alexander Bagulya |
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37 | // |
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38 | // Creation date: 21.05.2010 |
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39 | // |
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40 | // Modifications: |
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41 | // |
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42 | // |
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43 | // Class Description: |
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44 | // |
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45 | // Quantum Harmonic Oscillator Model for energy loss using atomic shell |
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46 | // structure of atoms taking into account Q^2 (main for projectile charge Q), |
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47 | // Q^3 and Q^4 terms for computation of energy loss due to binary collisions. |
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48 | // Can be applied on heavy negatively charged particles for the energy interval |
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49 | // 10 keV - 10 MeV scaled to the proton mass. |
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50 | // |
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51 | // Used data and formula of |
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52 | // 1. G4QAOLowEnergyLoss class, S.Chauvie, P.Nieminen, M.G.Pia. IEEE Trans. |
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53 | // Nucl. Sci. 54 (2007) 578. |
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54 | // 2. ShellStrength and ShellEnergy from ICRU'73 Report 2005, |
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55 | // 3. Data for Ta (Z=73) from P.Sigmund, A.Shinner. Eur. Phys. J. D15 (2001) |
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56 | // 165-172 |
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57 | // |
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58 | // ------------------------------------------------------------------- |
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59 | // |
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60 | |
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61 | #ifndef G4ICRU73QOModel_h |
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62 | #define G4ICRU73QOModel_h 1 |
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63 | |
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64 | #include "G4VEmModel.hh" |
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65 | #include "G4AtomicShells.hh" |
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66 | #include "G4DensityEffectData.hh" |
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67 | |
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68 | class G4ParticleChangeForLoss; |
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69 | |
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70 | class G4ICRU73QOModel : public G4VEmModel |
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71 | { |
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72 | |
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73 | public: |
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74 | |
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75 | G4ICRU73QOModel(const G4ParticleDefinition* p = 0, |
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76 | const G4String& nam = "ICRU73QO"); |
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77 | |
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78 | virtual ~G4ICRU73QOModel(); |
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79 | |
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80 | virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&); |
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81 | |
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82 | virtual G4double MinEnergyCut(const G4ParticleDefinition*, |
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83 | const G4MaterialCutsCouple*); |
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84 | |
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85 | virtual G4double ComputeCrossSectionPerElectron( |
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86 | const G4ParticleDefinition*, |
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87 | G4double kineticEnergy, |
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88 | G4double cutEnergy, |
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89 | G4double maxEnergy); |
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90 | |
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91 | virtual G4double ComputeCrossSectionPerAtom( |
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92 | const G4ParticleDefinition*, |
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93 | G4double kineticEnergy, |
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94 | G4double Z, G4double A, |
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95 | G4double cutEnergy, |
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96 | G4double maxEnergy); |
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97 | |
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98 | virtual G4double CrossSectionPerVolume(const G4Material*, |
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99 | const G4ParticleDefinition*, |
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100 | G4double kineticEnergy, |
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101 | G4double cutEnergy, |
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102 | G4double maxEnergy); |
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103 | |
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104 | virtual G4double ComputeDEDXPerVolume(const G4Material*, |
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105 | const G4ParticleDefinition*, |
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106 | G4double kineticEnergy, |
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107 | G4double); |
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108 | |
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109 | virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*, |
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110 | const G4MaterialCutsCouple*, |
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111 | const G4DynamicParticle*, |
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112 | G4double tmin, |
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113 | G4double maxEnergy); |
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114 | |
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115 | // add correction to energy loss and compute non-ionizing energy loss |
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116 | virtual void CorrectionsAlongStep(const G4MaterialCutsCouple*, |
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117 | const G4DynamicParticle*, |
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118 | G4double& eloss, |
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119 | G4double& niel, |
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120 | G4double length); |
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121 | |
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122 | protected: |
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123 | |
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124 | virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*, |
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125 | G4double kinEnergy); |
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126 | |
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127 | private: |
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128 | |
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129 | inline void SetParticle(const G4ParticleDefinition* p); |
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130 | inline void SetLowestKinEnergy(const G4double val); |
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131 | |
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132 | G4double DEDX(const G4Material* material, G4double kineticEnergy); |
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133 | |
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134 | G4double DEDXPerElement(G4int Z, G4double kineticEnergy); |
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135 | |
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136 | // hide assignment operator |
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137 | G4ICRU73QOModel & operator=(const G4ICRU73QOModel &right); |
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138 | G4ICRU73QOModel(const G4ICRU73QOModel&); |
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139 | |
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140 | const G4ParticleDefinition* particle; |
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141 | G4ParticleDefinition* theElectron; |
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142 | G4ParticleChangeForLoss* fParticleChange; |
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143 | G4DensityEffectData* denEffData; |
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144 | |
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145 | G4double mass; |
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146 | G4double q; |
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147 | G4double chargeSquare; |
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148 | G4double massRate; |
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149 | G4double ratio; |
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150 | G4double lowestKinEnergy; |
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151 | |
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152 | G4bool isInitialised; |
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153 | |
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154 | // get number of shell, energy and oscillator strenghts for material |
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155 | G4int GetNumberOfShells(G4int Z) const; |
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156 | |
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157 | G4double GetShellEnergy(G4int Z, G4int nbOfTheShell) const; |
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158 | G4double GetOscillatorEnergy(G4int Z, G4int nbOfTheShell) const; |
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159 | G4double GetShellStrength(G4int Z, G4int nbOfTheShell) const; |
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160 | |
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161 | // calculate stopping number for L's term |
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162 | G4double GetL0(G4double normEnergy) const; |
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163 | // terms in Z^2 |
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164 | G4double GetL1(G4double normEnergy) const; |
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165 | // terms in Z^3 |
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166 | G4double GetL2(G4double normEnergy) const; |
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167 | // terms in Z^4 |
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168 | |
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169 | |
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170 | // Z of element at now avaliable for the model |
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171 | static const G4int NQOELEM = 26; |
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172 | static const G4int NQODATA = 130; |
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173 | static const G4int ZElementAvailable[NQOELEM]; |
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174 | |
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175 | // number, energy and oscillator strenghts |
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176 | // for an harmonic oscillator model of material |
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177 | static const G4int startElemIndex[NQOELEM]; |
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178 | static const G4int nbofShellsForElement[NQOELEM]; |
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179 | static const G4double ShellEnergy[NQODATA]; |
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180 | static const G4double SubShellOccupation[NQODATA]; // Z * ShellStrength |
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181 | |
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182 | G4int indexZ[100]; |
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183 | |
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184 | // variable for calculation of stopping number of L's term |
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185 | static const G4double L0[67][2]; |
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186 | static const G4double L1[22][2]; |
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187 | static const G4double L2[14][2]; |
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188 | |
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189 | G4int sizeL0; |
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190 | G4int sizeL1; |
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191 | G4int sizeL2; |
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192 | |
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193 | static const G4double factorBethe[99]; |
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194 | |
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195 | }; |
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196 | |
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197 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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198 | |
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199 | inline void G4ICRU73QOModel::SetParticle(const G4ParticleDefinition* p) |
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200 | { |
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201 | particle = p; |
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202 | mass = particle->GetPDGMass(); |
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203 | q = particle->GetPDGCharge()/eplus; |
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204 | chargeSquare = q*q; |
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205 | massRate = mass/proton_mass_c2; |
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206 | ratio = electron_mass_c2/mass; |
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207 | } |
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208 | |
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209 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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210 | |
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211 | inline G4int G4ICRU73QOModel::GetNumberOfShells(G4int Z) const |
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212 | { |
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213 | G4int nShell = 0; |
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214 | |
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215 | if(indexZ[Z] >= 0) { nShell = nbofShellsForElement[indexZ[Z]]; |
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216 | } else { nShell = G4AtomicShells::GetNumberOfShells(Z); } |
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217 | |
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218 | return nShell; |
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219 | } |
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220 | |
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221 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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222 | |
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223 | inline G4double G4ICRU73QOModel::GetShellEnergy(G4int Z, |
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224 | G4int nbOfTheShell) const |
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225 | { |
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226 | G4double shellEnergy = 0.; |
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227 | |
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228 | G4int idx = indexZ[Z]; |
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229 | |
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230 | if(indexZ[Z] >= 0) { shellEnergy = ShellEnergy[startElemIndex[idx] + nbOfTheShell]*eV; |
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231 | } else { shellEnergy = GetOscillatorEnergy(Z, nbOfTheShell); } |
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232 | |
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233 | return shellEnergy; |
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234 | } |
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235 | |
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236 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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237 | |
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238 | inline G4double G4ICRU73QOModel::GetShellStrength(G4int Z, |
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239 | G4int nbOfTheShell) const |
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240 | { |
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241 | G4double shellStrength = 0.; |
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242 | |
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243 | G4int idx = indexZ[Z]; |
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244 | |
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245 | if(indexZ[Z] >= 0) { shellStrength = SubShellOccupation[startElemIndex[idx] + nbOfTheShell] / Z; |
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246 | } else { shellStrength = 1.0 / Z * G4AtomicShells::GetNumberOfElectrons(Z,nbOfTheShell); } |
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247 | |
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248 | return shellStrength; |
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249 | } |
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250 | |
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251 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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252 | |
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253 | inline void G4ICRU73QOModel::SetLowestKinEnergy(const G4double val) |
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254 | { |
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255 | lowestKinEnergy = val; |
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256 | } |
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257 | |
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258 | #endif |
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