Gabriele Cosmo
129 lines
4.9 KiB
C++
129 lines
4.9 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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// Author: Sebastien Incerti
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// 22 January 2012
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// on base of G4LivermoreGammaConversionModel (original version)
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// and G4LivermoreRayleighModel (MT version)
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#ifndef G4LivermoreGammaConversionModel_h
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#define G4LivermoreGammaConversionModel_h 1
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#include "G4VEmModel.hh"
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#include "G4Log.hh"
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class G4ParticleChangeForGamma;
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class G4LPhysicsFreeVector;
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class G4PhysicsLogVector;
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class G4LivermoreGammaConversionModel : public G4VEmModel
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{
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public:
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explicit G4LivermoreGammaConversionModel(
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const G4ParticleDefinition* p = nullptr,
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const G4String& nam = "LivermoreConversion");
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virtual ~G4LivermoreGammaConversionModel();
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virtual void Initialise(const G4ParticleDefinition*,
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const G4DataVector&);
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virtual void InitialiseLocal(const G4ParticleDefinition*,
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G4VEmModel* masterModel);
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virtual void InitialiseForElement(const G4ParticleDefinition*, G4int Z);
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virtual G4double ComputeCrossSectionPerAtom(
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const G4ParticleDefinition*,
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G4double kinEnergy,
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G4double Z,
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G4double A=0.0,
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G4double cut=0.0,
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G4double emax=DBL_MAX);
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virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double tmin,
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G4double maxEnergy);
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virtual G4double MinPrimaryEnergy(const G4Material*,
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const G4ParticleDefinition*,
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G4double);
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private:
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void ReadData(size_t Z, const char* path = nullptr);
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void InitialiseProbability(const G4ParticleDefinition*, G4int Z);
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inline G4double ScreenFunction1(G4double screenVariable);
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inline G4double ScreenFunction2(G4double screenVariable);
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G4LivermoreGammaConversionModel & operator=
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(const G4LivermoreGammaConversionModel &right) = delete;
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G4LivermoreGammaConversionModel(const G4LivermoreGammaConversionModel&) = delete;
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static G4double lowEnergyLimit;
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static G4double tripletLowEnergy;
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static G4double tripletHighEnergy;
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static G4int verboseLevel;
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static G4int nbinsTriplet;
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static G4int maxZ;
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static G4LPhysicsFreeVector* data[100]; // 100 because Z range is 1-99
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static G4PhysicsLogVector* probTriplet[100]; //
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G4ParticleChangeForGamma* fParticleChange;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double
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G4LivermoreGammaConversionModel::ScreenFunction1(G4double screenVariable)
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{
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// Compute the value of the screening function 3*phi1 - phi2
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return (screenVariable > 1.)
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? 42.24 - 8.368 * G4Log(screenVariable + 0.952)
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: 42.392 - screenVariable * (7.796 - 1.961 * screenVariable);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double
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G4LivermoreGammaConversionModel::ScreenFunction2(G4double screenVariable)
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{
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// Compute the value of the screening function 1.5*phi1 - 0.5*phi2
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return (screenVariable > 1.)
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? 42.24 - 8.368 * G4Log(screenVariable + 0.952)
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: 41.405 - screenVariable * (5.828 - 0.8945 * screenVariable);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#endif
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