Gabriele Cosmo
112 lines
3.7 KiB
C++
112 lines
3.7 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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//
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// Geant4 Header : G4HadronElastic
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//
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// Author : V.Ivanchenko 29 June 2009 (redesign old elastic model)
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//
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// Modified:
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//
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// Class Description
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// Default model for elastic scattering; GHEISHA algorithm is used
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// Class Description - End
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#ifndef G4HadronElastic_h
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#define G4HadronElastic_h 1
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#include "globals.hh"
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#include "G4HadronicInteraction.hh"
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#include "G4HadProjectile.hh"
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#include "G4Nucleus.hh"
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#include "G4NucleiProperties.hh"
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class G4ParticleDefinition;
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class G4HadronElastic : public G4HadronicInteraction
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{
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public:
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explicit G4HadronElastic(const G4String& name = "hElasticLHEP");
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~G4HadronElastic() override;
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// implementation of the G4HadronicInteraction interface
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G4HadFinalState* ApplyYourself(const G4HadProjectile & aTrack,
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G4Nucleus & targetNucleus) override;
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// sample momentum transfer using Lab. momentum
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G4double SampleInvariantT(const G4ParticleDefinition* p, G4double plab,
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G4int Z, G4int A) override;
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G4double GetSlopeCof( const G4int pdg );
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inline void SetLowestEnergyLimit(G4double value);
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inline G4double LowestEnergyLimit() const;
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inline G4double ComputeMomentumCMS(const G4ParticleDefinition* p,
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G4double plab, G4int Z, G4int A);
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void ModelDescription(std::ostream&) const override;
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protected:
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G4double pLocalTmax;
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G4int secID; // Creator model ID for the recoil
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private:
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G4ParticleDefinition* theProton;
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G4ParticleDefinition* theNeutron;
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G4ParticleDefinition* theDeuteron;
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G4ParticleDefinition* theAlpha;
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G4double lowestEnergyLimit;
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G4int nwarn;
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};
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inline void G4HadronElastic::SetLowestEnergyLimit(G4double value)
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{
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lowestEnergyLimit = value;
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}
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inline G4double G4HadronElastic::LowestEnergyLimit() const
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{
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return lowestEnergyLimit;
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}
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inline G4double
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G4HadronElastic::ComputeMomentumCMS(const G4ParticleDefinition* p,
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G4double plab, G4int Z, G4int A)
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{
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G4double m1 = p->GetPDGMass();
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G4double m12= m1*m1;
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G4double mass2 = G4NucleiProperties::GetNuclearMass(A, Z);
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return plab*mass2/std::sqrt(m12 + mass2*mass2 + 2.*mass2*std::sqrt(m12 + plab*plab));
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}
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#endif
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