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26 ////////////////////////////////////////////// << 26 // $Id: G4AdjointPhotoElectricModel.hh,v 1.5 2010-11-11 11:51:56 ldesorgh Exp $
27 // Class: G4AdjointPhotoElectricModel << 27 // GEANT4 tag $Name: geant4-09-04-patch-01 $
28 // Author: L. Desorgher <<
29 // Organisation: SpaceIT GmbH <<
30 // 28 //
31 // Model for the adjoint photo electric proce << 29 /////////////////////////////////////////////////////////////////////////////////
32 // Put a higher limit on the CS to avoid a hi << 30 // Module: G4AdjointPhotoElectricModel
33 // at low energy. The very high adjoint CS of << 31 // Author: L. Desorgher
34 // reaction produce a high rate of reverse ph << 32 // Organisation: SpaceIT GmbH
35 // side of a shielding for eaxmple, the corre << 33 // Contract: ESA contract 21435/08/NL/AT
36 // correction in the StepDoIt method is not s << 34 // Customer: ESA/ESTEC
37 // energy. The problem is partially solved by << 35 /////////////////////////////////////////////////////////////////////////////////
38 // compensating it by an extra weight correct << 36 //
39 // it with other reverse processes the revers << 37 // CHANGE HISTORY
40 // source of very occasional high weights tha << 38 // --------------
41 // computation. A way to solve this problemn << 39 // ChangeHistory:
42 // to find as it happens in rare cases but do << 40 // -1 September 2007 creation by L. Desorgher
43 // the normal distribution. (Very Tricky!) << 41 //
>> 42 // -January 2009. L. Desorgher
>> 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
>> 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
>> 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
>> 46 // and compensating it by an extra weight correction factor. However when coupling it with other reverse processes the reverse photo-electric is still
>> 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
>> 48 // to find as it happens in rarea case but does give a weighrt that is outside the noemal distribution. (Very Tricky!)
>> 49 //
>> 50 // -October 2009 Correction of Element sampling. L. Desorgher
>> 51 //
>> 52 //-------------------------------------------------------------
>> 53 // Documentation:
>> 54 // Model for the adjoint photo electric process
44 // 55 //
45 ////////////////////////////////////////////// <<
46 <<
47 #ifndef G4AdjointPhotoElectricModel_h 56 #ifndef G4AdjointPhotoElectricModel_h
48 #define G4AdjointPhotoElectricModel_h 1 57 #define G4AdjointPhotoElectricModel_h 1
49 58
>> 59
50 #include "globals.hh" 60 #include "globals.hh"
51 #include "G4VEmAdjointModel.hh" 61 #include "G4VEmAdjointModel.hh"
>> 62 #include "G4PEEffectModel.hh"
>> 63 class G4AdjointPhotoElectricModel: public G4VEmAdjointModel
52 64
53 class G4AdjointPhotoElectricModel : public G4V <<
54 { 65 {
55 public: << 66 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 67
66 G4double AdjointCrossSectionPerAtom(const G4 << 68 G4AdjointPhotoElectricModel();
67 G4double << 69 ~G4AdjointPhotoElectricModel();
68 << 70
69 G4AdjointPhotoElectricModel(G4AdjointPhotoEl << 71
70 G4AdjointPhotoElectricModel& operator=( << 72
71 const G4AdjointPhotoElectricModel& right) << 73 virtual void SampleSecondaries(const G4Track& aTrack,
72 << 74 G4bool IsScatProjToProjCase,
73 protected: << 75 G4ParticleChange* fParticleChange);
74 void CorrectPostStepWeight(G4ParticleChange* << 76 virtual G4double AdjointCrossSection(const G4MaterialCutsCouple* aCouple,
75 G4double old_weig << 77 G4double primEnergy,
76 G4double projecti << 78 G4bool IsScatProjToProjCase);
77 G4bool isScatProj << 79 virtual G4double GetAdjointCrossSection(const G4MaterialCutsCouple* aCouple,
78 << 80 G4double primEnergy,
79 private: << 81 G4bool IsScatProjToProjCase);
80 void DefineCurrentMaterialAndElectronEnergy( << 82
81 const G4MaterialCutsCouple* aCouple, G4dou << 83 G4double AdjointCrossSectionPerAtom(const G4Element* anElement,G4double electronEnergy);
82 << 84
83 G4double fShellProb[40][40]; << 85
84 G4double fXsec[40]; << 86
85 G4double fTotAdjointCS = 0.; << 87 inline void SetTheDirectPEEffectModel(G4PEEffectModel* aModel){theDirectPEEffectModel = aModel;
86 G4double fFactorCSBiasing = 1.; << 88 DefineDirectEMModel(aModel);}
87 G4double fPreStepAdjointCS = 0.; << 89
88 G4double fPostStepAdjointCS = 0.; << 90 virtual void CorrectPostStepWeight(G4ParticleChange* fParticleChange,
89 G4double fCurrenteEnergy = 0.; << 91 G4double old_weight,
90 << 92 G4double adjointPrimKinEnergy,
91 size_t fIndexElement = 0; << 93 G4double projectileKinEnergy,
>> 94 G4bool IsScatProjToProjCase);
>> 95
>> 96
>> 97 private:
>> 98 G4double xsec[40];
>> 99 G4double totAdjointCS;
>> 100 G4double totBiasedAdjointCS;
>> 101 G4double factorCSBiasing;
>> 102 G4double pre_step_AdjointCS;
>> 103 G4double post_step_AdjointCS;
>> 104
>> 105
>> 106 G4double shell_prob[40][40];
>> 107
>> 108
>> 109 G4PEEffectModel* theDirectPEEffectModel;
>> 110 size_t index_element;
>> 111 G4double current_eEnergy;
>> 112
>> 113
>> 114 private:
>> 115 void DefineCurrentMaterialAndElectronEnergy(const G4MaterialCutsCouple* aCouple,
>> 116 G4double eEnergy);
>> 117
92 }; 118 };
93 119
94 #endif 120 #endif
95 121