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25 // 25 //
26 ////////////////////////////////////////////// <<
27 // Class: G4AdjointPhotoElectricModel <<
28 // Author: L. Desorgher <<
29 // Organisation: SpaceIT GmbH <<
30 // 26 //
31 // Model for the adjoint photo electric proce << 27 /////////////////////////////////////////////////////////////////////////////////
32 // Put a higher limit on the CS to avoid a hi << 28 // Module: G4AdjointPhotoElectricModel
33 // at low energy. The very high adjoint CS of << 29 // Author: L. Desorgher
34 // reaction produce a high rate of reverse ph << 30 // Organisation: SpaceIT GmbH
35 // side of a shielding for eaxmple, the corre << 31 // Contract: ESA contract 21435/08/NL/AT
36 // correction in the StepDoIt method is not s << 32 // Customer: ESA/ESTEC
37 // energy. The problem is partially solved by << 33 /////////////////////////////////////////////////////////////////////////////////
38 // compensating it by an extra weight correct << 34 //
39 // it with other reverse processes the revers << 35 // CHANGE HISTORY
40 // source of very occasional high weights tha << 36 // --------------
41 // computation. A way to solve this problemn << 37 // ChangeHistory:
42 // to find as it happens in rare cases but do << 38 // -1 September 2007 creation by L. Desorgher
43 // the normal distribution. (Very Tricky!) << 39 //
>> 40 // -January 2009. L. Desorgher
>> 41 // 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
>> 42 // 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 occurrence
>> 43 // 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
>> 44 // and compensating it by an extra weight correction factor. However when coupling it with other reverse processes the reverse photo-electric is still
>> 45 // 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
>> 46 // to find as it happens in rarea case but does give a weighrt that is outside the noemal distribution. (Very Tricky!)
>> 47 //
>> 48 // -October 2009 Correction of Element sampling. L. Desorgher
>> 49 //
>> 50 //-------------------------------------------------------------
>> 51 // Documentation:
>> 52 // Model for the adjoint photo electric process
44 // 53 //
45 ////////////////////////////////////////////// <<
46 <<
47 #ifndef G4AdjointPhotoElectricModel_h 54 #ifndef G4AdjointPhotoElectricModel_h
48 #define G4AdjointPhotoElectricModel_h 1 55 #define G4AdjointPhotoElectricModel_h 1
49 56
>> 57
50 #include "globals.hh" 58 #include "globals.hh"
51 #include "G4VEmAdjointModel.hh" 59 #include "G4VEmAdjointModel.hh"
>> 60 #include "G4PEEffectFluoModel.hh"
>> 61 class G4AdjointPhotoElectricModel: public G4VEmAdjointModel
52 62
53 class G4AdjointPhotoElectricModel : public G4V <<
54 { 63 {
55 public: << 64 public:
56 G4AdjointPhotoElectricModel(); <<
57 ~G4AdjointPhotoElectricModel() override; <<
58 <<
59 void SampleSecondaries(const G4Track& aTrack <<
60 G4ParticleChange* fPa <<
61 <<
62 G4double AdjointCrossSection(const G4Materia <<
63 G4double primEn <<
64 G4bool isScatPr <<
65 65
66 G4double AdjointCrossSectionPerAtom(const G4 << 66 G4AdjointPhotoElectricModel();
67 G4double << 67 ~G4AdjointPhotoElectricModel();
68 << 68
69 G4AdjointPhotoElectricModel(G4AdjointPhotoEl << 69
70 G4AdjointPhotoElectricModel& operator=( << 70
71 const G4AdjointPhotoElectricModel& right) << 71 virtual void SampleSecondaries(const G4Track& aTrack,
72 << 72 G4bool IsScatProjToProjCase,
73 protected: << 73 G4ParticleChange* fParticleChange);
74 void CorrectPostStepWeight(G4ParticleChange* << 74 virtual G4double AdjointCrossSection(const G4MaterialCutsCouple* aCouple,
75 G4double old_weig << 75 G4double primEnergy,
76 G4double projecti << 76 G4bool IsScatProjToProjCase);
77 G4bool isScatProj << 77 virtual G4double GetAdjointCrossSection(const G4MaterialCutsCouple* aCouple,
78 << 78 G4double primEnergy,
79 private: << 79 G4bool IsScatProjToProjCase);
80 void DefineCurrentMaterialAndElectronEnergy( << 80
81 const G4MaterialCutsCouple* aCouple, G4dou << 81 G4double AdjointCrossSectionPerAtom(const G4Element* anElement,G4double electronEnergy);
82 << 82
83 G4double fShellProb[40][40]; << 83
84 G4double fXsec[40]; << 84
85 G4double fTotAdjointCS = 0.; << 85 inline void SetTheDirectPEEffectModel(G4PEEffectFluoModel* aModel){theDirectPEEffectModel = aModel;
86 G4double fFactorCSBiasing = 1.; << 86 DefineDirectEMModel(aModel);}
87 G4double fPreStepAdjointCS = 0.; << 87
88 G4double fPostStepAdjointCS = 0.; << 88 virtual void CorrectPostStepWeight(G4ParticleChange* fParticleChange,
89 G4double fCurrenteEnergy = 0.; << 89 G4double old_weight,
90 << 90 G4double adjointPrimKinEnergy,
91 size_t fIndexElement = 0; << 91 G4double projectileKinEnergy,
>> 92 G4bool IsScatProjToProjCase);
>> 93
>> 94
>> 95 private:
>> 96 G4double xsec[40];
>> 97 G4double totAdjointCS;
>> 98 G4double totBiasedAdjointCS;
>> 99 G4double factorCSBiasing;
>> 100 G4double pre_step_AdjointCS;
>> 101 G4double post_step_AdjointCS;
>> 102
>> 103
>> 104 G4double shell_prob[40][40];
>> 105
>> 106
>> 107 G4PEEffectFluoModel* theDirectPEEffectModel;
>> 108 size_t index_element;
>> 109 G4double current_eEnergy;
>> 110
>> 111
>> 112 private:
>> 113 void DefineCurrentMaterialAndElectronEnergy(const G4MaterialCutsCouple* aCouple,
>> 114 G4double eEnergy);
>> 115
92 }; 116 };
93 117
94 #endif 118 #endif
95 119