Gabriele Cosmo
147 lines
5.4 KiB
C++
147 lines
5.4 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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//
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// GEANT4 Class header file
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//
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//
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// File name: G4PolarizedCompton
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//
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// Author: Andreas Schaelicke
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// based on code by Michel Maire / Vladimir IVANTCHENKO
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// Class description
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//
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// modified version respecting media and beam polarization
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// using the stokes formalism
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//
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// Creation date: 01.05.2005
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//
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// Modifications:
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//
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// 01-01-05, include polarization description (A.Stahl)
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// 01-01-05, create asymmetry table and determine interactionlength (A.Stahl)
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// 01-05-05, update handling of media polarization (A.Schalicke)
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// 01-05-05, update polarized differential cross section (A.Schalicke)
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// 26-07-06, cross section recalculated (P.Starovoitov)
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// 09-08-06, make it work under current geant4 release (A.Schalicke)
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// 11-06-07, add PostStepGetPhysicalInteractionLength (A.Schalicke)
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//
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// -----------------------------------------------------------------------------
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#ifndef PolarizedComptonScattering_h
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#define PolarizedComptonScattering_h 1
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#include "globals.hh"
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#include "G4VEmProcess.hh"
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#include "G4Gamma.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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class G4ParticleDefinition;
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class G4VEmModel;
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class G4MaterialCutsCouple;
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class G4DynamicParticle;
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class G4PolarizedComptonModel;
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class G4PolarizedCompton : public G4VEmProcess
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{
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public: // with description
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G4PolarizedCompton(const G4String& processName ="pol-compt",
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G4ProcessType type = fElectromagnetic);
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virtual ~G4PolarizedCompton();
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// true for Gamma only.
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G4bool IsApplicable(const G4ParticleDefinition&);
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// Print few lines of informations about the process: validity range,
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virtual void PrintInfo();
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void SetModel(const G4String& name);
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protected:
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virtual void InitialiseProcess(const G4ParticleDefinition*);
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// added for polarization treatment of polarized media:
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virtual void BuildPhysicsTable(const G4ParticleDefinition&);
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virtual void PreparePhysicsTable(const G4ParticleDefinition&);
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void BuildAsymmetryTable(const G4ParticleDefinition& part);
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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 & tAsymmetry);
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virtual G4double GetMeanFreePath(const G4Track& aTrack,
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G4double previousStepSize,
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G4ForceCondition* condition);
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virtual 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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// can be removed as soon as G4PolarizationChangeForGamma is fixed!
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// virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
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private:
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G4PolarizedCompton& operator=(const G4PolarizedCompton &right);
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G4PolarizedCompton(const G4PolarizedCompton& );
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G4bool buildAsymmetryTable;
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G4bool useAsymmetryTable;
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G4bool isInitialised;
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G4VEmModel* selectedModel;
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G4int mType;
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// added for polarization treatment:
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G4PolarizedComptonModel* emModel;
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G4PhysicsTable* theAsymmetryTable; // table for crosssection assymmetry
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G4ThreeVector targetPolarization;
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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 G4PolarizedCompton::IsApplicable(const G4ParticleDefinition& p)
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{
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return (&p == G4Gamma::Gamma());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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