Gabriele Cosmo
95 lines
3.8 KiB
C++
95 lines
3.8 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// GEANT4 physics class: G4PhotoNuclearCrossSection -- header file
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// Created: M.V. Kossov, CERN/ITEP(Moscow), 10-OCT-01
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// The last update: M.V. Kossov, CERN/ITEP (Moscow) 17-May-02
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#ifndef G4PhotoNuclearCrossSection_h
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#define G4PhotoNuclearCrossSection_h 1
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#include "G4VCrossSectionDataSet.hh"
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#include "G4DynamicParticle.hh"
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#include "G4Element.hh"
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#include "G4ParticleTable.hh"
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#include "G4NucleiProperties.hh"
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#include "G4NistManager.hh"
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#include <vector>
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class G4PhotoNuclearCrossSection : public G4VCrossSectionDataSet
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{
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public:
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G4PhotoNuclearCrossSection();
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virtual ~G4PhotoNuclearCrossSection();
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static const char* Default_Name() {return "PhotoNuclearXS";}
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virtual void CrossSectionDescription(std::ostream&) const;
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virtual G4bool
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IsElementApplicable(const G4DynamicParticle* particle, G4int Z,
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const G4Material*);
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virtual G4double
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GetElementCrossSection(const G4DynamicParticle*, G4int Z,
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const G4Material*);
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private:
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G4int GetFunctions(G4double a, G4double* y, G4double* z);
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G4double EquLinearFit(G4double X, G4int N, const G4double X0,
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const G4double XD, const G4double* Y);
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G4double ThresholdEnergy(G4int Z, G4int N);
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// Body
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private:
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G4int lastZ; // The last Z of calculated nucleus
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G4double lastSig; // Last value of the Cross Section
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G4double* lastGDR; // Pointer to the last array of GDR cross sections
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G4double* lastHEN; // Pointer to the last array of HEn cross sections
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G4double lastE; // Last used in the cross section Energy
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G4double lastTH; // Last value of the Energy Threshold (A-dependent)
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G4double lastSP; // Last value of the ShadowingPomeron (A-dependent)
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// Vector of pointers to the GDRPhotonuclearCrossSection
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std::vector <G4double*> GDR;
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// Vector of pointers to the HighEnPhotonuclearCrossSect
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std::vector <G4double*> HEN;
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std::vector <G4double> spA; // shadowing coefficients (A-dependent)
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std::vector <G4double> eTH; // energy threshold (A-dependent)
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G4NistManager* nistmngr;
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G4double mNeut;
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G4double mProt;
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};
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#endif
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