Gabriele Cosmo
146 lines
5.1 KiB
C++
146 lines
5.1 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: G4eplusPolarizedAnnihilation.hh,v 1.3 2007/06/11 13:37:56 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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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: G4eplusPolarizedAnnihilation
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//
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// Author: A. Schaelicke on base of Vladimir Ivanchenko / Michel Maire code
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//
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// Creation date: 02.07.2006
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//
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// Modifications:
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// 26-07-06 modified cross section (P. Starovoitov)
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// 21-08-06 interface updated (A. Schaelicke)
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// 11-06-07, add PostStepGetPhysicalInteractionLength (A.Schalicke)
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//
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//
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// Class Description:
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//
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// Polarized process of e+ annihilation into 2 gammas
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//
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// -------------------------------------------------------------------
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//
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#ifndef G4eplusPolarizedAnnihilation_h
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#define G4eplusPolarizedAnnihilation_h 1
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#include "G4VEmProcess.hh"
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#include "G4Positron.hh"
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#include "G4VEmModel.hh"
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class G4PolarizedAnnihilationModel;
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class G4eplusPolarizedAnnihilation : public G4VEmProcess
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{
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public:
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G4eplusPolarizedAnnihilation(const G4String& name = "pol-annihil");
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virtual ~G4eplusPolarizedAnnihilation();
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virtual G4bool IsApplicable(const G4ParticleDefinition& p);
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virtual G4VParticleChange* AtRestDoIt(
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const G4Track& track,
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const G4Step& stepData);
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G4double AtRestGetPhysicalInteractionLength(
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const G4Track& track,
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G4ForceCondition* condition
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);
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// Print out of the class parameters
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virtual void PrintInfo();
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// for polarization
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// G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
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G4double GetMeanFreePath(const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition);
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G4double PostStepGetPhysicalInteractionLength(
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const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition
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);
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virtual void BuildPhysicsTable(const G4ParticleDefinition&);
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void BuildAsymmetryTable(const G4ParticleDefinition& part);
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virtual void PreparePhysicsTable(const G4ParticleDefinition&);
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G4double ComputeAsymmetry(G4double energy,
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const G4MaterialCutsCouple* couple,
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const G4ParticleDefinition& particle,
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G4double cut,
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G4double &tasm);
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protected:
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virtual void InitialiseProcess(const G4ParticleDefinition*);
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private:
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G4bool isInitialised;
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// for polarization:
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G4PolarizedAnnihilationModel* emModel;
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G4ThreeVector theTargetPolarization;
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G4PhysicsTable* theAsymmetryTable; // table for cross section assym.
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G4PhysicsTable* theTransverseAsymmetryTable; // table for transverse cross section assym.
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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 G4bool G4eplusPolarizedAnnihilation::IsApplicable(const G4ParticleDefinition& p)
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{
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return (&p == G4Positron::Positron());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eplusPolarizedAnnihilation::AtRestGetPhysicalInteractionLength(
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const G4Track&, G4ForceCondition* condition)
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{
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*condition = NotForced;
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return 0.0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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