Gabriele Cosmo
215 lines
7.2 KiB
C++
215 lines
7.2 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// $Id: G4eeToHadrons.hh,v 1.1 2004/11/19 18:44:04 vnivanch Exp $
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// GEANT4 tag $Name: geant4-07-00-cand-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: G4eeToHadrons
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 12.08.2004
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//
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// Modifications:
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// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
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//
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//
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// Class Description:
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//
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// This class manages the process of e+ annihilation into hadrons
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//
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// -------------------------------------------------------------------
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//
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#ifndef G4eeToHadrons_h
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#define G4eeToHadrons_h 1
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#include "G4VEmProcess.hh"
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#include "G4Positron.hh"
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#include "G4eeToHadronsModel.hh"
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#include <vector>
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class G4eeCrossSections;
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class G4eeToHadrons : public G4VEmProcess
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{
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public:
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G4eeToHadrons(const G4String& name = "ee2hadr");
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virtual ~G4eeToHadrons();
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virtual G4bool IsApplicable(const G4ParticleDefinition& p);
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virtual std::vector<G4DynamicParticle*>* SecondariesPostStep(
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G4VEmModel*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*);
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G4double CrossSection(G4double kineticEnergy, const G4MaterialCutsCouple* couple);
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// It returns the cross section of the process for energy/ material
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virtual G4double RecalculateLambda(G4double kinEnergy,
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const G4MaterialCutsCouple* couple);
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virtual void PrintInfoDefinition();
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// Print out of the class parameters
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virtual G4PhysicsVector* LambdaPhysicsVector(const G4MaterialCutsCouple*);
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void SetCrossSecFactor(G4double fac);
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// Set the factor to artificially increase the crossSection (default 1)
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protected:
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virtual void InitialiseProcess(const G4ParticleDefinition*);
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G4double GetMeanFreePath(const G4Track&,G4double,G4ForceCondition*);
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virtual void ResetNumberOfInteractionLengthLeft();
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virtual G4double MaxSecondaryEnergy(const G4DynamicParticle* dp);
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private:
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G4double ComputeMeanFreePath(G4double kineticEnergy,
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const G4MaterialCutsCouple* couple);
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std::vector<G4DynamicParticle*>* GenerateSecondaries(const G4DynamicParticle*);
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// hide assignment operator
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G4eeToHadrons & operator=(const G4eeToHadrons &right);
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G4eeToHadrons(const G4eeToHadrons&);
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G4eeCrossSections* cross;
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std::vector<G4eeToHadronsModel*> models;
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std::vector<G4double> ekinMin;
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std::vector<G4double> ekinPeak;
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std::vector<G4double> ekinMax;
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std::vector<G4double> cumSum;
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G4double thKineticEnergy;
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G4double maxKineticEnergy;
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G4double mfpKineticEnergy;
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G4double preStepMFP;
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G4double preStepCS;
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G4double lambdaFactor;
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G4double csFactor;
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const G4MaterialCutsCouple* currentCouple;
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G4int nModels;
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G4bool isInitialised;
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G4bool abovePeak;
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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 G4eeToHadrons::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 G4eeToHadrons::MaxSecondaryEnergy(const G4DynamicParticle* dp)
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{
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return dp->GetKineticEnergy();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline std::vector<G4DynamicParticle*>* G4eeToHadrons::SecondariesPostStep(
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G4VEmModel*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle* dp)
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{
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std::vector<G4DynamicParticle*>* newp = 0;
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G4double kinEnergy = dp->GetKineticEnergy();
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if (kinEnergy > thKineticEnergy) newp = GenerateSecondaries(dp);
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return newp;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eeToHadrons::GetMeanFreePath(const G4Track& track,
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G4double,
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G4ForceCondition* condition)
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{
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*condition = NotForced;
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G4double kinEnergy = track.GetKineticEnergy();
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G4double x = DBL_MAX;
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if (kinEnergy > thKineticEnergy)
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x = ComputeMeanFreePath(kinEnergy, track.GetMaterialCutsCouple());
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return x;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eeToHadrons::CrossSection(G4double kineticEnergy,
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const G4MaterialCutsCouple* couple)
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{
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G4double cross = 0.0;
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if (kineticEnergy > thKineticEnergy) {
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for(G4int i=0; i<nModels; i++) {
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if(kineticEnergy >= ekinMin[i] && kineticEnergy <= ekinMax[i])
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cross += csFactor*(models[i])->CrossSection(couple,0,kineticEnergy,0.0,0.0);
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cumSum[i] = cross;
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}
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}
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return cross;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eeToHadrons::RecalculateLambda(G4double kinEnergy,
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const G4MaterialCutsCouple* couple)
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{
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return CrossSection(kinEnergy, couple);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4eeToHadrons::ResetNumberOfInteractionLengthLeft()
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{
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currentCouple = 0;
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abovePeak = false;
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preStepCS = 0.0;
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G4VProcess::ResetNumberOfInteractionLengthLeft();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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