Gabriele Cosmo
171 lines
6.0 KiB
C++
171 lines
6.0 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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// -------------------------------------------------------------------
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//
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// GEANT4 Class header file
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//
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//
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// File name: G4SeltzerBergerModel
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//
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// Author: Andreas Schaelicke & Vladimir Ivantchenko
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//
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// Creation date: 04.10.2011
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//
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// Modifications:
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//
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// 24.07.2018 Introduced possibility to use sampling tables to sample the
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// emitted photon energy (instead of using rejectio) from the
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// Seltzer-Berger scalled DCS for bremsstrahlung photon emission.
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// Using these sampling tables option gives faster(30-70%) final
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// state generation than the original rejection but takes some
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// extra memory (+ ~6MB in the case of the full CMS detector).
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// (M Novak)
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//
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// Class Description:
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//
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// Implementation of the bremssrahlung energy spectrum using
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// 1. S.M. Seltzer and M.J. Berger Nucl. Instr. Meth. B12 (1985) 95
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// 2. S.M. Seltzer and M.J. Berger Atomic data and Nuclear Data
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// Tables 35 (1986) 345
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// -------------------------------------------------------------------
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//
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#ifndef G4SeltzerBergerModel_h
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#define G4SeltzerBergerModel_h 1
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#include "G4VEmModel.hh"
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#include "G4eBremsstrahlungRelModel.hh"
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#include "globals.hh"
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class G4Physics2DVector;
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class G4SBBremTable;
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class G4ParticleChangeForLoss;
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class G4SeltzerBergerModel : public G4VEmModel
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{
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public:
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explicit G4SeltzerBergerModel(const G4ParticleDefinition* p = nullptr,
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const G4String& nam = "eBremSB");
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~G4SeltzerBergerModel() override;
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void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
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void InitialiseLocal(const G4ParticleDefinition*,
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G4VEmModel* masterModel) override;
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G4double ComputeDEDXPerVolume(const G4Material*,
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const G4ParticleDefinition*,
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G4double ekin,
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G4double cutEnergy) override;
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G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
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G4double ekin,
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G4double zet,
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G4double,
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G4double cutEnergy,
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G4double maxEnergy = DBL_MAX) override;
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void SampleSecondaries(std::vector<G4DynamicParticle*>*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double cutEnergy,
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G4double maxEnergy) override;
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void SetupForMaterial(const G4ParticleDefinition*,
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const G4Material*, G4double) override;
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G4double MinPrimaryEnergy(const G4Material*,
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const G4ParticleDefinition*,
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G4double cutEnergy) override;
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inline void SetBicubicInterpolationFlag(G4bool val)
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{ fIsUseBicubicInterpolation = val; };
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// hide assignment operator and cctr
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G4SeltzerBergerModel & operator=(const G4SeltzerBergerModel &right) = delete;
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G4SeltzerBergerModel(const G4SeltzerBergerModel&) = delete;
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private:
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void SetParticle(const G4ParticleDefinition* p);
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void ReadData(G4int Z);
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G4double ComputeBremLoss(G4double cutEnergy);
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G4double ComputeXSectionPerAtom(G4double cutEnergy);
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G4double ComputeDXSectionPerAtom(G4double gammaEnergy);
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G4double SampleEnergyTransfer(const G4double kineticEnergy,
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const G4double logKineticEnergy,
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const G4double cut,
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const G4double emax);
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protected:
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G4ParticleChangeForLoss* fParticleChange{nullptr};
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private:
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static constexpr G4int gMaxZet{101};
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static constexpr G4double gExpNumLimit{-12.};
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static G4double gYLimitData[gMaxZet];
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static G4Physics2DVector* gSBDCSData[gMaxZet];
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static G4SBBremTable* gSBSamplingTable;
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static const G4double gBremFactor;
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static const G4double gMigdalConstant;
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G4bool fIsUseBicubicInterpolation{false};
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G4bool fIsUseSamplingTables{true};
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G4bool fIsElectron{true};
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G4bool fIsScatOffElectron{false};
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G4bool isInitializer{false};
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//
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G4int fCurrentIZ{0};
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G4int fNumWarnings{0};
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const G4ParticleDefinition* fPrimaryParticle{nullptr};
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G4ParticleDefinition* fGammaParticle;
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// cash
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G4double fPrimaryKinEnergy{0.};
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G4double fPrimaryTotalEnergy{0.};
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G4double fDensityFactor{0.};
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G4double fDensityCorr{0.};
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G4double fLowestKinEnergy;
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std::size_t fIndx{0};
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std::size_t fIndy{0};
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};
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#endif
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