| 1 | //
|
|---|
| 2 | // ********************************************************************
|
|---|
| 3 | // * License and Disclaimer *
|
|---|
| 4 | // * *
|
|---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
|
|---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
|
|---|
| 7 | // * conditions of the Geant4 Software License, included in the file *
|
|---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
|
|---|
| 9 | // * include a list of copyright holders. *
|
|---|
| 10 | // * *
|
|---|
| 11 | // * Neither the authors of this software system, nor their employing *
|
|---|
| 12 | // * institutes,nor the agencies providing financial support for this *
|
|---|
| 13 | // * work make any representation or warranty, express or implied, *
|
|---|
| 14 | // * regarding this software system or assume any liability for its *
|
|---|
| 15 | // * use. Please see the license in the file LICENSE and URL above *
|
|---|
| 16 | // * for the full disclaimer and the limitation of liability. *
|
|---|
| 17 | // * *
|
|---|
| 18 | // * This code implementation is the result of the scientific and *
|
|---|
| 19 | // * technical work of the GEANT4 collaboration. *
|
|---|
| 20 | // * By using, copying, modifying or distributing the software (or *
|
|---|
| 21 | // * any work based on the software) you agree to acknowledge its *
|
|---|
| 22 | // * use in resulting scientific publications, and indicate your *
|
|---|
| 23 | // * acceptance of all terms of the Geant4 Software license. *
|
|---|
| 24 | // ********************************************************************
|
|---|
| 25 | //
|
|---|
| 26 | //
|
|---|
| 27 | // $Id: G4VHadronElastic.hh,v 1.4 2009/09/23 14:37:44 vnivanch Exp $
|
|---|
| 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $
|
|---|
| 29 | //
|
|---|
| 30 | // Geant4 Header : G4VHadronElastic
|
|---|
| 31 | //
|
|---|
| 32 | // Author : V.Ivanchenko 29 June 2009 (redesign old elastic model)
|
|---|
| 33 | //
|
|---|
| 34 | // Modified:
|
|---|
| 35 | //
|
|---|
| 36 | // Class Description
|
|---|
| 37 | // Default model for elastic scattering; GHEISHA algorithm is used
|
|---|
| 38 | // Class Description - End
|
|---|
| 39 |
|
|---|
| 40 | #ifndef G4VHadronElastic_h
|
|---|
| 41 | #define G4VHadronElastic_h 1
|
|---|
| 42 |
|
|---|
| 43 | #include "globals.hh"
|
|---|
| 44 | #include "G4HadronicInteraction.hh"
|
|---|
| 45 | #include "G4HadProjectile.hh"
|
|---|
| 46 | #include "G4Nucleus.hh"
|
|---|
| 47 | #include "G4NucleiProperties.hh"
|
|---|
| 48 |
|
|---|
| 49 | class G4ParticleDefinition;
|
|---|
| 50 |
|
|---|
| 51 | class G4VHadronElastic : public G4HadronicInteraction
|
|---|
| 52 | {
|
|---|
| 53 | public:
|
|---|
| 54 |
|
|---|
| 55 | G4VHadronElastic(const G4String& name = "hElasticLHEP");
|
|---|
| 56 |
|
|---|
| 57 | virtual ~G4VHadronElastic();
|
|---|
| 58 |
|
|---|
| 59 | // implementation of the G4HadronicInteraction interface
|
|---|
| 60 | virtual G4HadFinalState * ApplyYourself(const G4HadProjectile & aTrack,
|
|---|
| 61 | G4Nucleus & targetNucleus);
|
|---|
| 62 |
|
|---|
| 63 | // sample momentum transfer using Lab. momentum
|
|---|
| 64 | virtual G4double SampleInvariantT(const G4ParticleDefinition* p,
|
|---|
| 65 | G4double plab,
|
|---|
| 66 | G4int Z, G4int A);
|
|---|
| 67 |
|
|---|
| 68 | inline void SetLowestEnergyLimit(G4double value);
|
|---|
| 69 |
|
|---|
| 70 | inline void ComputeMomentumCMS(const G4ParticleDefinition* p,
|
|---|
| 71 | G4double plab, G4int Z, G4int A);
|
|---|
| 72 |
|
|---|
| 73 | protected:
|
|---|
| 74 |
|
|---|
| 75 | G4double momentumCMS;
|
|---|
| 76 |
|
|---|
| 77 | private:
|
|---|
| 78 |
|
|---|
| 79 | G4ParticleDefinition* theProton;
|
|---|
| 80 | G4ParticleDefinition* theNeutron;
|
|---|
| 81 | G4ParticleDefinition* theDeuteron;
|
|---|
| 82 | G4ParticleDefinition* theAlpha;
|
|---|
| 83 |
|
|---|
| 84 | G4double lowestEnergyLimit;
|
|---|
| 85 |
|
|---|
| 86 | };
|
|---|
| 87 |
|
|---|
| 88 | inline void G4VHadronElastic::SetLowestEnergyLimit(G4double value)
|
|---|
| 89 | {
|
|---|
| 90 | lowestEnergyLimit = value;
|
|---|
| 91 | }
|
|---|
| 92 |
|
|---|
| 93 | inline void
|
|---|
| 94 | G4VHadronElastic::ComputeMomentumCMS(const G4ParticleDefinition* p,
|
|---|
| 95 | G4double plab, G4int Z, G4int A)
|
|---|
| 96 | {
|
|---|
| 97 | G4double m1 = p->GetPDGMass();
|
|---|
| 98 | G4double m12= m1*m1;
|
|---|
| 99 | G4double m2 = G4NucleiProperties::GetNuclearMass(A, Z);
|
|---|
| 100 | momentumCMS = plab*m2/std::sqrt(m12 + m2*m2 + 2.*m2*std::sqrt(m12 + plab*plab));
|
|---|
| 101 | }
|
|---|
| 102 |
|
|---|
| 103 | #endif
|
|---|
