Import Geant4 11.3.0 source tree
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Gabriele Cosmo
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//
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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: G4RiGeMuPairProductionModel
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//
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// Authors: Girardo Depaola & Ricardo Pacheco
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//
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// Creation date: 29.10.2024
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//
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//
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// -------------------------------------------------------------------
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//
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#ifndef G4RiGeMuPairProductionModel_h
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#define G4RiGeMuPairProductionModel_h 1
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#include "G4VEmModel.hh"
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#include "G4NistManager.hh"
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#include "G4ElementData.hh"
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#include "G4Physics2DVector.hh"
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#include "G4VEmAngularDistribution.hh"
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#include <vector>
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class G4Element;
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class G4ParticleChangeForLoss;
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class G4RiGeAngularGenerator;
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class G4RiGeMuPairProductionModel : public G4VEmModel
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{
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public:
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explicit G4RiGeMuPairProductionModel(const G4ParticleDefinition* p = nullptr);
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~G4RiGeMuPairProductionModel() override = default;
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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 ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double Z, G4double A,
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G4double cutEnergy,
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G4double maxEnergy) override;
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G4double ComputeDEDXPerVolume(const G4Material*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy) 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 tmin,
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G4double maxEnergy) override;
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G4double MinPrimaryEnergy(const G4Material*,
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const G4ParticleDefinition*,
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G4double) override;
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G4double
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ComputeDMicroscopicCrossSection(G4double tkin, G4double Z,
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G4double pairEnergy);
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inline void SetLowestKineticEnergy(G4double e);
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inline void SetParticle(const G4ParticleDefinition*);
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// hide assignment operator and copy constructor
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G4RiGeMuPairProductionModel& operator=
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(const G4RiGeMuPairProductionModel& right) = delete;
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G4RiGeMuPairProductionModel(const G4RiGeMuPairProductionModel&) = delete;
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protected:
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G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
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G4double tmax);
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G4double ComputeMicroscopicCrossSection(G4double tkin,
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G4double Z,
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G4double cut);
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G4double FindScaledEnergy(G4int Z, G4double rand, G4double logTkin,
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G4double yymin, G4double yymax);
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inline G4double MaxSecondaryEnergyForElement(G4double kineticEnergy,
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G4double Z);
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void MakeSamplingTables();
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void StoreTables() const;
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G4bool RetrieveTables();
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virtual void DataCorrupted(G4int Z, G4double logTkin) const;
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G4ParticleChangeForLoss* fParticleChange = nullptr;
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const G4ParticleDefinition* particle = nullptr;
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G4NistManager* nist = nullptr;
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G4double factorForCross;
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G4double sqrte;
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G4double particleMass = 0.0;
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G4double z13 = 0.0;
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G4double z23 = 0.0;
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G4double lnZ = 0.0;
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G4double minPairEnergy;
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G4double lowestKinEnergy;
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G4double emin;
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G4double emax;
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G4double ymin = -5.0;
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G4double dy = 0.005;
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// Random numbers for sampling
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G4double randNumbs[9];
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G4int currentZ = 0;
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G4int nYBinPerDecade = 4;
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std::size_t nbiny = 1000;
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std::size_t nbine = 0;
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G4bool fTableToFile = false;
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// static members
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static const G4int NZDATPAIR = 5;
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static const G4int NINTPAIR = 8;
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static const G4int ZDATPAIR[NZDATPAIR];
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static const G4double xgi[NINTPAIR];
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static const G4double wgi[NINTPAIR];
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private:
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G4RiGeAngularGenerator* fAngularGenerator;
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G4ParticleDefinition* theElectron;
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G4ParticleDefinition* thePositron;
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G4String dataName{""};
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4RiGeMuPairProductionModel::SetLowestKineticEnergy(G4double e)
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{
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lowestKinEnergy = e;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4RiGeMuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
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{
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if(nullptr == particle) {
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particle = p;
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particleMass = particle->GetPDGMass();
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double
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G4RiGeMuPairProductionModel::MaxSecondaryEnergyForElement(G4double kineticEnergy,
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G4double ZZ)
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{
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G4int Z = G4lrint(ZZ);
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if(Z != currentZ) {
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currentZ = Z;
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z13 = nist->GetZ13(Z);
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z23 = z13*z13;
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lnZ = nist->GetLOGZ(Z);
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}
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return kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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