| 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 | // |
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| 27 | // GEANT4 tag $Name: geant4-09-02 $ |
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| 28 | // |
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| 29 | // |
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| 30 | // GEANT4 physics class: G4PhotoNuclearCrossSection -- header file |
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| 31 | // Created: M.V. Kossov, CERN/ITEP(Moscow), 10-OCT-01 |
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| 32 | // The last update: M.V. Kossov, CERN/ITEP (Moscow) 17-May-02 |
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| 33 | // |
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| 34 | |
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| 35 | #ifndef G4PhotoNuclearCrossSection_h |
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| 36 | #define G4PhotoNuclearCrossSection_h 1 |
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| 37 | |
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| 38 | #include "G4VCrossSectionDataSet.hh" |
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| 39 | #include "G4DynamicParticle.hh" |
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| 40 | #include "G4Element.hh" |
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| 41 | #include "G4ParticleTable.hh" |
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| 42 | #include "G4NucleiProperties.hh" |
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| 43 | #include <vector> |
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| 44 | |
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| 45 | class G4PhotoNuclearCrossSection : public G4VCrossSectionDataSet |
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| 46 | { |
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| 47 | public: |
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| 48 | |
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| 49 | G4PhotoNuclearCrossSection(); |
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| 50 | virtual ~G4PhotoNuclearCrossSection(); |
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| 51 | |
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| 52 | |
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| 53 | G4bool IsApplicable(const G4DynamicParticle* particle, const G4Element* ) |
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| 54 | { |
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| 55 | return IsZAApplicable(particle, 0, 0); |
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| 56 | } |
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| 57 | |
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| 58 | G4bool IsZAApplicable(const G4DynamicParticle* particle, |
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| 59 | G4double /*ZZ*/, G4double /*AA*/) |
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| 60 | { |
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| 61 | G4bool result = false; |
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| 62 | if( particle->GetDefinition()->GetPDGEncoding()==22) result = true; |
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| 63 | return result; |
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| 64 | } |
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| 65 | |
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| 66 | |
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| 67 | G4double GetCrossSection(const G4DynamicParticle* particle, |
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| 68 | const G4Element* element, G4double temp = 0.); |
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| 69 | |
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| 70 | G4double GetIsoZACrossSection(const G4DynamicParticle* particle, |
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| 71 | G4double ZZ, G4double AA, |
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| 72 | G4double /*aTemperature*/); |
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| 73 | |
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| 74 | |
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| 75 | void BuildPhysicsTable(const G4ParticleDefinition&) {} |
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| 76 | |
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| 77 | void DumpPhysicsTable(const G4ParticleDefinition&) {} |
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| 78 | |
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| 79 | private: |
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| 80 | G4int GetFunctions(G4double a, G4double* y, G4double* z); |
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| 81 | G4double EquLinearFit(G4double X, G4int N,const G4double X0,const G4double XD, const G4double* Y); |
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| 82 | G4double ThresholdEnergy(G4int Z, G4int N); |
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| 83 | |
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| 84 | // Body |
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| 85 | private: |
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| 86 | static G4int lastN; // The last N of calculated nucleus |
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| 87 | static G4int lastZ; // The last Z of calculated nucleus |
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| 88 | static G4double lastSig; // Last value of the Cross Section |
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| 89 | static G4double* lastGDR; // Pointer to the last array of GDR cross sections |
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| 90 | static G4double* lastHEN; // Pointer to the last array of HEn cross sections |
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| 91 | static G4double lastE; // Last used in the cross section Energy |
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| 92 | static G4double lastTH; // Last value of the Energy Threshold (A-dependent) |
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| 93 | static G4double lastSP; // Last value of the ShadowingPomeron (A-dependent) |
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| 94 | |
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| 95 | static std::vector <G4double*> GDR; // Vector of pointers to the GDRPhotonuclearCrossSection |
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| 96 | static std::vector <G4double*> HEN; // Vector of pointers to the HighEnPhotonuclearCrossSect |
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| 97 | |
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| 98 | }; |
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| 99 | |
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| 100 | #endif |
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