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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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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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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: G4AdjointPhotoElectricModel.hh,v 1.4 2009/11/20 10:31:20 ldesorgh 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 | // Module: G4AdjointPhotoElectricModel |
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31 | // Author: L. Desorgher |
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32 | // Organisation: SpaceIT GmbH |
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33 | // Contract: ESA contract 21435/08/NL/AT |
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34 | // Customer: ESA/ESTEC |
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35 | ///////////////////////////////////////////////////////////////////////////////// |
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36 | // |
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37 | // CHANGE HISTORY |
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38 | // -------------- |
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39 | // ChangeHistory: |
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40 | // -1 September 2007 creation by L. Desorgher |
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41 | // |
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42 | // -January 2009. L. Desorgher |
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43 | // Put a higher limit on the CS to avoid a high rate of Inverse Photo e- effect at low energy. The very high adjoint CS of the reverse |
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44 | // photo electric reaction produce a high rate of reverse photo electric reaction in the inner side of a shielding for eaxmple, the correction of this occurence |
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45 | // by weight correction in the StepDoIt method is not statistically sufficient at small energy. The problem is partially solved by setting an higher CS limit |
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46 | // and compensating it by an extra weight correction factor. However when coupling it with other reverse processes the reverse photo-electric is still |
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47 | // the source of very occasional high weight that decrease the efficiency of the computation. A way to solve this problemn is still needed but is difficult |
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48 | // to find as it happens in rarea case but does give a weighrt that is outside the noemal distribution. (Very Tricky!) |
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49 | // |
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50 | // -October 2009 Correction of Element sampling. L. Desorgher |
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51 | // |
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52 | //------------------------------------------------------------- |
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53 | // Documentation: |
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54 | // Model for the adjoint photo electric process |
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55 | // |
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56 | #ifndef G4AdjointPhotoElectricModel_h |
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57 | #define G4AdjointPhotoElectricModel_h 1 |
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58 | |
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59 | |
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60 | #include "globals.hh" |
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61 | #include "G4VEmAdjointModel.hh" |
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62 | #include "G4PEEffectModel.hh" |
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63 | class G4AdjointPhotoElectricModel: public G4VEmAdjointModel |
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64 | |
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65 | { |
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66 | public: |
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67 | |
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68 | G4AdjointPhotoElectricModel(); |
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69 | ~G4AdjointPhotoElectricModel(); |
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70 | |
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71 | |
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72 | |
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73 | virtual void SampleSecondaries(const G4Track& aTrack, |
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74 | G4bool IsScatProjToProjCase, |
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75 | G4ParticleChange* fParticleChange); |
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76 | virtual G4double AdjointCrossSection(const G4MaterialCutsCouple* aCouple, |
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77 | G4double primEnergy, |
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78 | G4bool IsScatProjToProjCase); |
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79 | |
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80 | G4double AdjointCrossSectionPerAtom(const G4Element* anElement,G4double electronEnergy); |
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81 | |
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82 | |
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83 | |
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84 | inline void SetTheDirectPEEffectModel(G4PEEffectModel* aModel){theDirectPEEffectModel = aModel; |
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85 | DefineDirectEMModel(aModel);} |
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86 | |
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87 | virtual void CorrectPostStepWeight(G4ParticleChange* fParticleChange, |
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88 | G4double old_weight, |
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89 | G4double adjointPrimKinEnergy, |
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90 | G4double projectileKinEnergy, |
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91 | G4bool IsScatProjToProjCase); |
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92 | |
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93 | |
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94 | private: |
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95 | G4double xsec[40]; |
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96 | G4double totAdjointCS; |
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97 | G4double totBiasedAdjointCS; |
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98 | G4double factorCSBiasing; |
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99 | G4double pre_step_AdjointCS; |
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100 | G4double post_step_AdjointCS; |
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101 | |
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102 | |
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103 | G4double shell_prob[40][40]; |
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104 | |
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105 | |
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106 | G4PEEffectModel* theDirectPEEffectModel; |
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107 | size_t index_element; |
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108 | G4double current_eEnergy; |
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109 | |
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110 | |
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111 | private: |
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112 | void DefineCurrentMaterialAndElectronEnergy(const G4MaterialCutsCouple* aCouple, |
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113 | G4double eEnergy); |
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114 | |
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115 | }; |
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116 | |
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117 | #endif |
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