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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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11 | // * Neither the authors of this software system, nor their employing * |
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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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21 | // * any work based on the software) you agree to acknowledge its * |
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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: G4VLowEnergyDiscretePhotonProcess.hh,v 1.4 2006/06/29 19:37:13 gunter Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // -------------------------------------------------------------- |
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30 | // |
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31 | // File name: G4VLowEnergyDiscretePhotonProcess.hh |
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32 | // |
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33 | // Author: Capra Riccardo |
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34 | // |
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35 | // Creation date: May 2005 |
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36 | // |
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37 | // History: |
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38 | // ----------- |
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39 | // 02 May 2005 R. Capra 1st implementation |
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40 | // 20 May 2005 MGP Modified protected member functions to return a const pointer |
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41 | // |
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42 | //---------------------------------------------------------------- |
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43 | |
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44 | |
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45 | |
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46 | #ifndef G4VLowEnergyDiscretePhotonProcess_hh |
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47 | #define G4VLowEnergyDiscretePhotonProcess_hh |
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48 | |
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49 | // Base class |
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50 | #include "G4VLowEnergyTestableDiscreteProcess.hh" |
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51 | |
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52 | // Forward declaration |
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53 | class G4String; |
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54 | class G4ParticleDefinition; |
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55 | class G4DynamicParticle; |
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56 | class G4Track; |
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57 | class G4VCrossSectionHandler; |
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58 | class G4VEMDataSet; |
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59 | class G4VDataSetAlgorithm; |
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60 | |
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61 | // G4VLowEnergyDiscretePhotonProcess |
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62 | // A common class for Rayleigh and Compton processes |
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63 | class G4VLowEnergyDiscretePhotonProcess : public G4VLowEnergyTestableDiscreteProcess |
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64 | { |
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65 | public: |
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66 | // Class constructor |
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67 | // |
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68 | // Creates crossSectionHandler and scatterFunctionData |
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69 | // scatterFunctionData are loaded from the scatterFile file, and are interpolated with scatterInterpolation algorithm |
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70 | // processName The name of the process |
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71 | // aCrossSectionFileName The name of the cross-section data file |
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72 | // aScatterFileName The name of the scatter function data |
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73 | // aScatterInterpolation The interpolation algorithm |
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74 | // aLowEnergyLimit The lower energy limit of validity against data |
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75 | // aHighEnergyLimit The higher energy limit of validity against data |
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76 | G4VLowEnergyDiscretePhotonProcess(const G4String& processName, |
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77 | const G4String& aCrossSectionFileName, |
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78 | const G4String& aScatterFileName, |
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79 | G4VDataSetAlgorithm* aScatterInterpolation, |
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80 | G4double aLowEnergyLimit, |
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81 | G4double aHighEnergyLimit); |
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82 | |
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83 | // Class destructor |
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84 | // |
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85 | // Deletes crossSectionHandler, meanFreePathTable and scatterFunctionData |
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86 | virtual ~G4VLowEnergyDiscretePhotonProcess(void); |
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87 | |
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88 | |
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89 | |
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90 | // Checks if the process is applicable to the particle |
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91 | // |
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92 | // For processes inheriting from this class the only applicable particle is the photon |
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93 | // particleDefinition Is the particle to be checked for the applicability of the process |
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94 | // true only if the particle is a photon |
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95 | virtual G4bool IsApplicable(const G4ParticleDefinition& particleDefinition); |
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96 | |
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97 | // Updates the crossSectionHandler and builds the meanFreePathTable from it |
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98 | // |
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99 | // crossSectionHandler data is loaded from crossSectionFile file |
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100 | // photon particle is always a photon |
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101 | virtual void BuildPhysicsTable(const G4ParticleDefinition& photon); |
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102 | |
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103 | |
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104 | |
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105 | // Returns the low energy limit of the process |
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106 | // The low energy limit of the process |
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107 | inline G4double GetLowEnergyLimit(void) const {return lowEnergyLimit;} |
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108 | |
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109 | // Returns the high energy limit of the process |
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110 | // The high energy limit of the process |
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111 | inline G4double GetHighEnergyLimit(void) const {return highEnergyLimit;} |
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112 | |
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113 | |
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114 | |
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115 | protected: |
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116 | // Evaluates the process mean free path |
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117 | // |
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118 | // Mean free path evaluation is based on meanFreePathTable generated by the crossSectionHandler with data taken from the crossSectionFile. |
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119 | // The method uses lowEnergyLimit and highEnergyLimit |
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120 | // aTrack the particle momentum for which the mean free path must be evaluates (a photon) |
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121 | // previousStepSize the size of the prevous step (not used by this implementation) |
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122 | // condition the consition to be updated (not used by this implementation) |
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123 | // The mean free path for the process |
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124 | virtual G4double GetMeanFreePath(const G4Track &aTrack, |
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125 | G4double previousStepSize, |
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126 | G4ForceCondition* condition); |
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127 | |
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128 | // Returns the cross-section handler |
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129 | // The cross-section handler |
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130 | inline const G4VCrossSectionHandler* GetCrossSectionHandler(void) const {return crossSectionHandler;} |
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131 | |
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132 | // Returns the mean free path table |
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133 | // The mean free path table |
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134 | inline const G4VEMDataSet* GetMeanFreePathTable(void) const {return meanFreePathTable;} |
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135 | |
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136 | // Returns the scatter function data |
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137 | // The scatter function data |
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138 | inline const G4VEMDataSet* GetScatterFunctionData(void) const {return scatterFunctionData;} |
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139 | |
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140 | |
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141 | |
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142 | // Verifies if the polarization vector is orthonormal to the photon direction |
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143 | // |
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144 | // This method is used by polarized processes. It returns always a vector orthonormal to the photon direction. |
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145 | // When G4DynamicParticle::GetPolarization() is well defined the returned vector matches this vector. |
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146 | // When G4DynamicParticle::GetPolarization() is sensibly different from a null-vector, the returned vector is |
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147 | // orthonormal to the photon direction and on the plane made with G4DynamicParticle::GetPolarization() |
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148 | // When G4DynamicParticle::GetPolarization() is almost a null-vector, the returned vector is a random |
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149 | // vector orthonormal to the photon direction |
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150 | // photon The incoming photon |
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151 | // s Always a vector ortogonal to the photon direction. |
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152 | G4ThreeVector GetPhotonPolarization(const G4DynamicParticle& photon); |
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153 | |
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154 | |
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155 | |
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156 | private: |
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157 | |
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158 | // Hides copy constructor |
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159 | G4VLowEnergyDiscretePhotonProcess(const G4VLowEnergyDiscretePhotonProcess& ); |
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160 | |
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161 | // Hides assignment operator |
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162 | G4VLowEnergyDiscretePhotonProcess& operator=(const G4VLowEnergyDiscretePhotonProcess& ); |
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163 | |
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164 | // Low energy limit |
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165 | G4double lowEnergyLimit; |
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166 | |
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167 | // High energy limit |
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168 | G4double highEnergyLimit; |
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169 | |
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170 | // Cross-section file name |
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171 | G4String crossSectionFileName; |
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172 | |
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173 | // Cross-section handler |
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174 | G4VCrossSectionHandler* crossSectionHandler; |
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175 | |
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176 | // The mean free path table based on cross-section data |
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177 | G4VEMDataSet* meanFreePathTable; |
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178 | |
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179 | // Scatter function table |
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180 | G4VEMDataSet* scatterFunctionData; |
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181 | }; |
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182 | |
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183 | #endif /* G4VLowEnergyDiscretePhotonProcess_hh */ |
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