Gabriele Cosmo
145 lines
5.2 KiB
C++
145 lines
5.2 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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// File name: G4KaonMinusAbsorptionAtRest.hh
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//
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// Author: Christian V"olcker (Christian.Volcker@cern.ch),
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//
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// Creation date: 10. November 1997
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//
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// -------------------------------------------------------------------
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#ifndef G4KaonMinusAbsorptionAtRest_h
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#define G4KaonMinusAbsorptionAtRest_h 1
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// Class Description:
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//
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// Process for nuclear absorption of K- at rest.
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// To be used in your physics list in case you need this physics.
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G4VRestProcess.hh"
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#include "G4ParticleTypes.hh"
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#include "G4Nucleus.hh"
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#include "G4DynamicParticle.hh"
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#include "G4DynamicParticleVector.hh"
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#include "G4NucleiPropertiesTable.hh"
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//#include "G4String.hh"
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// *********************************************************
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class G4KaonMinusAbsorptionAtRest : public G4VRestProcess
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// *********************************************************
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{
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private:
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// hide assignment operator as private
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G4KaonMinusAbsorptionAtRest& operator=(const G4KaonMinusAbsorptionAtRest &right);
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G4KaonMinusAbsorptionAtRest(const G4KaonMinusAbsorptionAtRest& );
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public:
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G4KaonMinusAbsorptionAtRest(const G4String& processName ="KaonMinusAbsorptionAtRest",
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G4ProcessType aType = fHadronic );
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~G4KaonMinusAbsorptionAtRest();
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//override methods...
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public:
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G4bool IsApplicable(const G4ParticleDefinition& particle) {
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return( particle == *(G4KaonMinus::KaonMinus()) );
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}
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// the main method ...
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G4VParticleChange* AtRestDoIt(const G4Track& aTrack, const G4Step& aStep);
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protected: // why?? might be private....
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// zero mean lifetime
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G4double GetMeanLifeTime(const G4Track& aTrack,
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G4ForceCondition* )
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{
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G4double result = 0;
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if(aTrack.GetMaterial()->GetNumberOfElements() == 1)
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if(aTrack.GetMaterial()->GetZ()<1.5) result = DBL_MAX;
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return result;
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}
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private:
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// returns proton or neutron with fermi-momentum
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G4DynamicParticle GetAbsorbingNucleon();
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// returns proton or neutron particle definition;
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G4ParticleDefinition* SelectAbsorbingNucleon();
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// provides the neutron halo factor for absorption on nucleus surface.
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// in the G4Nucleus
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G4double NeutronHaloFactor(G4double Z, G4double N);
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// creates the reaction products
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G4DynamicParticleVector* KaonNucleonReaction();
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// secondary pion absorption in parent nucleus
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// if TRUE, then add excitation energy to the Nucleus
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G4bool AbsorbPionByNucleus(G4DynamicParticle* aPion);
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// secondary Sigma-Lambda conversion
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// if conversion Done, then add excitation energy to the Nucleus
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G4DynamicParticle *SigmaLambdaConversion(G4DynamicParticle* aSigma);
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// instance variables ...
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private:
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// pointer to current stopped hadron
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const G4DynamicParticle *stoppedHadron;
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// pointer to current target nucleus
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G4Nucleus* nucleus;
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// some constant parameters
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G4double pionAbsorptionRate;
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// primary production rates ( for absorption on Carbon)
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G4double rateLambdaZeroPiZero;
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G4double rateSigmaMinusPiPlus;
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G4double rateSigmaPlusPiMinus;
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G4double rateSigmaZeroPiZero;
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G4double rateLambdaZeroPiMinus;
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G4double rateSigmaZeroPiMinus;
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G4double rateSigmaMinusPiZero;
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// Sigma Lambda Conversion rates
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// for sigma- p -> lambda n
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// sigma+ n -> lambda p
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// sigma- n -> lambda
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G4double sigmaPlusLambdaConversionRate;
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G4double sigmaMinusLambdaConversionRate;
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G4double sigmaZeroLambdaConversionRate;
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};
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#endif
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