| 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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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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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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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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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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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: geant4-09-04-beta-01 $ |
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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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