Gabriele Cosmo
188 lines
5.7 KiB
C++
188 lines
5.7 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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// $Id: G4WentzelVIRelModel.hh 96934 2016-05-18 09:10:41Z gcosmo $
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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: G4WentzelVIRelModel
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//
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// Author: V.Ivanchenko
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//
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// Creation date: 08.06.2012 from G4WentzelVIModel
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//
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// Modifications:
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//
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// Class Description:
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//
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// Implementation of the model of multiple scattering based on
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// G.Wentzel, Z. Phys. 40 (1927) 590.
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// H.W.Lewis, Phys Rev 78 (1950) 526.
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// J.M. Fernandez-Varea et al., NIM B73 (1993) 447.
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// L.Urban, CERN-OPEN-2006-077.
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// -------------------------------------------------------------------
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//
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#ifndef G4WentzelVIRelModel_h
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#define G4WentzelVIRelModel_h 1
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "G4VMscModel.hh"
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#include "G4MaterialCutsCouple.hh"
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#include "G4WentzelVIRelXSection.hh"
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class G4ParticleDefinition;
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class G4LossTableManager;
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class G4NistManager;
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class G4Pow;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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class G4WentzelVIRelModel : public G4VMscModel
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{
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public:
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explicit G4WentzelVIRelModel(G4bool combined = true);
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virtual ~G4WentzelVIRelModel();
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virtual void Initialise(const G4ParticleDefinition*,
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const G4DataVector&) override;
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virtual void StartTracking(G4Track*) override;
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virtual G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
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G4double KineticEnergy,
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G4double AtomicNumber,
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G4double AtomicWeight=0.,
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G4double cut = DBL_MAX,
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G4double emax= DBL_MAX) override;
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virtual G4ThreeVector& SampleScattering(const G4ThreeVector&,
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G4double safety) override;
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virtual G4double
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ComputeTruePathLengthLimit(const G4Track& track,
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G4double& currentMinimalStep) override;
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virtual G4double ComputeGeomPathLength(G4double truePathLength) override;
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virtual G4double ComputeTrueStepLength(G4double geomStepLength) override;
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private:
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G4double ComputeXSectionPerVolume();
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inline void SetupParticle(const G4ParticleDefinition*);
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inline void DefineMaterial(const G4MaterialCutsCouple*);
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// hide assignment operator
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G4WentzelVIRelModel & operator=(const G4WentzelVIRelModel &right) = delete;
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G4WentzelVIRelModel(const G4WentzelVIRelModel&) = delete;
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G4LossTableManager* theManager;
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G4NistManager* fNistManager;
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G4ParticleChangeForMSC* fParticleChange;
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G4WentzelVIRelXSection* wokvi;
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G4Pow* fG4pow;
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const G4DataVector* currentCuts;
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G4double tlimitminfix;
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G4double invsqrt12;
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// cache kinematics
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G4double preKinEnergy;
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G4double tPathLength;
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G4double zPathLength;
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G4double lambdaeff;
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G4double currentRange;
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// data for single scattering mode
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G4double xtsec;
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std::vector<G4double> xsecn;
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std::vector<G4double> prob;
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G4int nelments;
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G4double numlimit;
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// cache material
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G4int currentMaterialIndex;
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const G4MaterialCutsCouple* currentCouple;
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const G4Material* currentMaterial;
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// single scattering parameters
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G4double cosThetaMin;
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G4double cosThetaMax;
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G4double cosTetMaxNuc;
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// projectile
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const G4ParticleDefinition* particle;
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G4double lowEnergyLimit;
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// flags
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G4bool isCombined;
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G4bool inside;
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G4bool singleScatteringMode;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4WentzelVIRelModel::DefineMaterial(const G4MaterialCutsCouple* cup)
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{
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if(cup != currentCouple) {
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currentCouple = cup;
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SetCurrentCouple(cup);
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currentMaterial = cup->GetMaterial();
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currentMaterialIndex = currentCouple->GetIndex();
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4WentzelVIRelModel::SetupParticle(const G4ParticleDefinition* p)
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{
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// Initialise mass and charge
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if(p != particle) {
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particle = p;
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wokvi->SetupParticle(p);
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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