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Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 ////////////////////////////////////////////// 26 //////////////////////////////////////////////////////////////////////////////// 27 // Class: G4AdjointPhotoElectricModel 27 // Class: G4AdjointPhotoElectricModel 28 // Author: L. Desorgher 28 // Author: L. Desorgher 29 // Organisation: SpaceIT GmbH 29 // Organisation: SpaceIT GmbH 30 // 30 // 31 // Model for the adjoint photo electric proce 31 // Model for the adjoint photo electric process. 32 // Put a higher limit on the CS to avoid a hi 32 // Put a higher limit on the CS to avoid a high rate of Inverse Photo e-effect 33 // at low energy. The very high adjoint CS of 33 // at low energy. The very high adjoint CS of the reverse photo electric 34 // reaction produce a high rate of reverse ph 34 // reaction produce a high rate of reverse photo electric reaction in the inner 35 // side of a shielding for eaxmple, the corre 35 // side of a shielding for eaxmple, the correction of this occurrence by weight 36 // correction in the StepDoIt method is not s 36 // correction in the StepDoIt method is not statistically sufficient at small 37 // energy. The problem is partially solved by 37 // energy. The problem is partially solved by setting a higher CS limit and 38 // compensating it by an extra weight correct 38 // compensating it by an extra weight correction factor. However when coupling 39 // it with other reverse processes the revers 39 // it with other reverse processes the reverse photo-electric is still the 40 // source of very occasional high weights tha 40 // source of very occasional high weights that decrease the efficiency of the 41 // computation. A way to solve this problemn 41 // computation. A way to solve this problemn is still needed but is difficult 42 // to find as it happens in rare cases but do 42 // to find as it happens in rare cases but does give a weight that is outside 43 // the normal distribution. (Very Tricky!) 43 // the normal distribution. (Very Tricky!) 44 // 44 // 45 ////////////////////////////////////////////// 45 //////////////////////////////////////////////////////////////////////////////// 46 46 47 #ifndef G4AdjointPhotoElectricModel_h 47 #ifndef G4AdjointPhotoElectricModel_h 48 #define G4AdjointPhotoElectricModel_h 1 48 #define G4AdjointPhotoElectricModel_h 1 49 49 50 #include "globals.hh" 50 #include "globals.hh" 51 #include "G4VEmAdjointModel.hh" 51 #include "G4VEmAdjointModel.hh" 52 52 53 class G4AdjointPhotoElectricModel : public G4V 53 class G4AdjointPhotoElectricModel : public G4VEmAdjointModel 54 { 54 { 55 public: 55 public: 56 G4AdjointPhotoElectricModel(); 56 G4AdjointPhotoElectricModel(); 57 ~G4AdjointPhotoElectricModel() override; 57 ~G4AdjointPhotoElectricModel() override; 58 58 59 void SampleSecondaries(const G4Track& aTrack 59 void SampleSecondaries(const G4Track& aTrack, G4bool isScatProjToProj, 60 G4ParticleChange* fPa 60 G4ParticleChange* fParticleChange) override; 61 61 62 G4double AdjointCrossSection(const G4Materia 62 G4double AdjointCrossSection(const G4MaterialCutsCouple* aCouple, 63 G4double primEn 63 G4double primEnergy, 64 G4bool isScatPr 64 G4bool isScatProjToProj) override; 65 65 66 G4double AdjointCrossSectionPerAtom(const G4 66 G4double AdjointCrossSectionPerAtom(const G4Element* anElement, 67 G4double 67 G4double electronEnergy); 68 68 69 G4AdjointPhotoElectricModel(G4AdjointPhotoEl 69 G4AdjointPhotoElectricModel(G4AdjointPhotoElectricModel&) = delete; 70 G4AdjointPhotoElectricModel& operator=( 70 G4AdjointPhotoElectricModel& operator=( 71 const G4AdjointPhotoElectricModel& right) 71 const G4AdjointPhotoElectricModel& right) = delete; 72 72 73 protected: 73 protected: 74 void CorrectPostStepWeight(G4ParticleChange* 74 void CorrectPostStepWeight(G4ParticleChange* fParticleChange, 75 G4double old_weig 75 G4double old_weight, G4double adjointPrimKinEnergy, 76 G4double projecti 76 G4double projectileKinEnergy, 77 G4bool isScatProj 77 G4bool isScatProjToProj) override; 78 78 79 private: 79 private: 80 void DefineCurrentMaterialAndElectronEnergy( 80 void DefineCurrentMaterialAndElectronEnergy( 81 const G4MaterialCutsCouple* aCouple, G4dou 81 const G4MaterialCutsCouple* aCouple, G4double eEnergy); 82 82 83 G4double fShellProb[40][40]; 83 G4double fShellProb[40][40]; 84 G4double fXsec[40]; 84 G4double fXsec[40]; 85 G4double fTotAdjointCS = 0.; 85 G4double fTotAdjointCS = 0.; 86 G4double fFactorCSBiasing = 1.; 86 G4double fFactorCSBiasing = 1.; 87 G4double fPreStepAdjointCS = 0.; 87 G4double fPreStepAdjointCS = 0.; 88 G4double fPostStepAdjointCS = 0.; 88 G4double fPostStepAdjointCS = 0.; 89 G4double fCurrenteEnergy = 0.; 89 G4double fCurrenteEnergy = 0.; 90 90 91 size_t fIndexElement = 0; 91 size_t fIndexElement = 0; 92 }; 92 }; 93 93 94 #endif 94 #endif 95 95