Gabriele Cosmo
213 lines
6.9 KiB
C++
213 lines
6.9 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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//
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// History: first implementation, based on object model of
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// 7 July 1996 H.Kurashige
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// ------------------------------------------------------------
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// New Physics scheme 18 Jan. 1997 H.Kurahige
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// ------------------------------------------------------------
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// modified 4 Feb. 1997 H.Kurahige
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// modified 8 Sep. 1997 H.Kurahige
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// remove BuildPhysicsTable() 27 Nov. 1997 H.Kurashige
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// modified for new ParticleChange 12 Mar. 1998 H.Kurashige
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// added aPhysicsTable 2 Aug. 1998 H.Kurashige
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// PreAssignedDecayTime 18 Jan. 2001 H.Kurashige
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// Add External Decayer 23 Feb. 2001 H.Kurashige
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// Remove PhysicsTable 12 Feb. 2002 H.Kurashige
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// Fixed bug in PostStepGPIL
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// in case of stopping during AlongStepDoIt 12 Mar. 2004 H.Kurashige
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// Add GetRemainderLifeTime 10 Aug/2004 H.Kurashige
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// Add DaughterPolarization 23 July 2008 H.Kurashige
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#ifndef G4Decay_h
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#define G4Decay_h 1
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#include "G4ios.hh"
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#include "globals.hh"
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#include "G4VRestDiscreteProcess.hh"
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#include "G4ParticleChangeForDecay.hh"
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#include "G4DecayProcessType.hh"
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class G4VExtDecayer;
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class G4Decay : public G4VRestDiscreteProcess
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{
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// Class Description
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// This class is a decay process
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public:
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// Constructors
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G4Decay(const G4String& processName ="Decay");
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// Destructor
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virtual ~G4Decay();
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private:
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// copy constructor
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G4Decay(const G4Decay &right);
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// Assignment Operation (generated)
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G4Decay & operator=(const G4Decay &right);
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public: //With Description
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// G4Decay Process has both
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// PostStepDoIt (for decay in flight)
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// and
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// AtRestDoIt (for decay at rest)
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virtual G4VParticleChange *PostStepDoIt(
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const G4Track& aTrack,
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const G4Step& aStep
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) override;
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virtual G4VParticleChange* AtRestDoIt(
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const G4Track& aTrack,
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const G4Step& aStep
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) override;
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virtual void BuildPhysicsTable(const G4ParticleDefinition&) override;
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// In G4Decay, thePhysicsTable stores values of
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// beta * std::sqrt( 1 - beta*beta)
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// as a function of normalized kinetic enregy (=Ekin/mass),
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// becasuse this table is universal for all particle types,
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virtual G4bool IsApplicable(const G4ParticleDefinition&) override;
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// returns "true" if the decay process can be applied to
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// the particle type.
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protected: // With Description
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virtual G4VParticleChange* DecayIt(
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const G4Track& aTrack,
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const G4Step& aStep
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);
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// The DecayIt() method returns by pointer a particle-change object,
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// which has information of daughter particles.
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// Set daughter polarization
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// NO OPERATION in the base class of G4Decay
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virtual void DaughterPolarization(const G4Track& aTrack,
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G4DecayProducts* products);
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public:
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virtual G4double AtRestGetPhysicalInteractionLength(
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const G4Track& track,
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G4ForceCondition* condition
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) override;
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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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) override;
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protected: // With Description
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// GetMeanFreePath returns ctau*beta*gamma for decay in flight
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// GetMeanLifeTime returns ctau for decay at rest
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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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) override;
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virtual G4double GetMeanLifeTime(const G4Track& aTrack,
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G4ForceCondition* condition
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) override;
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public: //With Description
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virtual void StartTracking(G4Track*) override;
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virtual void EndTracking() override;
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// inform Start/End of tracking for each track to the physics process
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public: //With Description
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void SetExtDecayer(G4VExtDecayer*);
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const G4VExtDecayer* GetExtDecayer() const;
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// Set/Get External Decayer
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G4double GetRemainderLifeTime() const;
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//Get Remainder of life time at rest decay
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virtual void ProcessDescription(std::ostream& outFile) const override;
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//
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protected:
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G4int verboseLevel;
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// controle flag for output message
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// 0: Silent
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// 1: Warning message
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// 2: More
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protected:
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// Remainder of life time at rest
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G4double fRemainderLifeTime;
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// ParticleChange for decay process
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G4ParticleChangeForDecay fParticleChangeForDecay;
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// External Decayer
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G4VExtDecayer* pExtDecayer;
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};
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inline
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G4VParticleChange* G4Decay::AtRestDoIt(
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const G4Track& aTrack,
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const G4Step& aStep
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)
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{
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return DecayIt(aTrack, aStep);
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}
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inline
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const G4VExtDecayer* G4Decay::GetExtDecayer() const
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{
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return pExtDecayer;
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}
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inline
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G4double G4Decay::GetRemainderLifeTime() const
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{
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return fRemainderLifeTime;
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}
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#endif
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