Gabriele Cosmo
189 lines
6.9 KiB
C++
189 lines
6.9 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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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 statement,
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// and all its terms.
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//
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// $Id: G4IMuPairProduction.hh,v 1.3 2000/04/25 14:18:58 maire Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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// $Id:
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// For information related to this code contact:
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// CERN, CN Division, ASD group
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// History: first implementation, based on object model of
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// 2nd December 1995, G.Cosmo
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// -------- G4IMuPairProduction physics process ---------
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// by Laszlo Urban, May 1998
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// ************************************************************
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#ifndef G4IMuPairproduction_h
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#define G4IMuPairproduction_h 1
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#include "G4ios.hh"
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G4VIMuEnergyLoss.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4Electron.hh"
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#include "G4Positron.hh"
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#include "G4MuonMinus.hh"
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#include "G4MuonPlus.hh"
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#include "G4OrderedTable.hh"
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#include "G4PhysicsTable.hh"
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#include "G4PhysicsLogVector.hh"
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class G4IMuPairProduction : public G4VIMuEnergyLoss
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{
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public:
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G4IMuPairProduction(const G4String& processName = "IMuPairProduction");
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~G4IMuPairProduction();
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G4bool IsApplicable(const G4ParticleDefinition&);
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private:
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G4IMuPairProduction & operator=(const G4IMuPairProduction &right);
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G4IMuPairProduction(const G4IMuPairProduction&);
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public:
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// post Step functions .......................................
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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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G4VParticleChange *PostStepDoIt(
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const G4Track& track,
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const G4Step& Step ) ;
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void BuildLossTable(const G4ParticleDefinition& ParticleType);
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void BuildLambdaTable(const G4ParticleDefinition& ParticleType);
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void BuildPhysicsTable(const G4ParticleDefinition& ParticleType);
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protected:
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inline G4double ComputeMeanFreePath( const G4ParticleDefinition* ParticleType,
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G4double KineticEnergy,
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const G4Material* aMaterial);
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void ComputePartialSumSigma( const G4ParticleDefinition* ParticleType,
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G4double KineticEnergy,
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const G4Material* aMaterial);
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virtual G4double ComputeMicroscopicCrossSection(
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const G4ParticleDefinition* ParticleType,
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G4double KineticEnergy,
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G4double AtomicNumber,
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G4double ElectronEnergyCut,
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G4double PositronEnergyCut);
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G4double ComputeDDMicroscopicCrossSection(
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const G4ParticleDefinition* ParticleType,
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G4double KineticEnergy,
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G4double AtomicNumber,
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G4double PairEnergy,
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G4double asymmetry);
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G4double ComputeDMicroscopicCrossSection(
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const G4ParticleDefinition* ParticleType,
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G4double KineticEnergy,
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G4double AtomicNumber,
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G4double PairEnergy);
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void MakeSamplingTables( const G4ParticleDefinition* ParticleType );
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private:
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void BuildNlambdaTable(const G4ParticleDefinition& aParticleType) ;
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void BuildNlambdaVector(const G4ParticleDefinition& aParticleType,
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G4int materialIndex,
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G4PhysicsLogVector* nlambdaVector) ;
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void BuildInverseNlambdaTable(
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const G4ParticleDefinition& aParticleType) ;
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void InvertNlambdaVector(const G4ParticleDefinition& aParticleType,
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G4int materialIndex,
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G4PhysicsLogVector* nlambdaVector) ;
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void BuildCoeffATable(const G4ParticleDefinition& aParticleType) ;
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void BuildCoeffBTable(const G4ParticleDefinition& aParticleType) ;
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void BuildCoeffCTable(const G4ParticleDefinition& aParticleType) ;
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void TestOfInversion(const G4ParticleDefinition& aParticleType,
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G4int printflag) ;
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G4double ComputePairLoss( const G4ParticleDefinition* ParticleType,
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G4double Z,G4double T,G4double ElectronCut,
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G4double PositronCut);
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G4Element* SelectRandomAtom(G4Material* aMaterial) const;
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private:
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G4PhysicsTable* theMeanFreePathTable ;
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static G4PhysicsTable* themuplusLambdaTable ;
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static G4PhysicsTable* themuminusLambdaTable ;
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G4OrderedTable PartialSumSigma; // partial sum of total crosssection
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G4PhysicsTable* theNlambdaTable;
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G4PhysicsTable* theInverseNlambdaTable;
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G4PhysicsTable* theCoeffATable;
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G4PhysicsTable* theCoeffBTable;
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G4PhysicsTable* theCoeffCTable;
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const G4double LowestKineticEnergy; // low energy limit of the crossection formula
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const G4double HighestKineticEnergy; // high energy limit of the crossection formula
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G4int TotBin; // number of bins in the tables
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G4double MinKineticEnergy; //process is ignored if T<MinKineticEnergy
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G4double MinCutValue; //protection against divergencies
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G4double CutInRange;
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const G4Electron* theElectron;
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const G4Positron* thePositron;
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const G4MuonMinus* theMuonMinus;
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const G4MuonPlus* theMuonPlus;
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const G4double* ElectronCutInKineticEnergy;
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const G4double* PositronCutInKineticEnergy;
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const G4double* MuonMinusCutInKineticEnergy;
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const G4double* MuonPlusCutInKineticEnergy;
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const G4double* ParticleCutInKineticEnergy;
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G4double ElectronCutInKineticEnergyNow;
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G4double PositronCutInKineticEnergyNow;
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G4double MuonMinusCutInKineticEnergyNow;
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G4double MuonPlusCutInKineticEnergyNow;
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G4double ParticleCutInKineticEnergyNow;
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// tables for sampling ..............
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static G4int nzdat,ntdat,NBIN ;
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static G4double zdat[5],tdat[8] ;
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static G4double ya[1000],proba[5][8][1000] ;
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G4int NumberOfBuildPhysicsTableCalls ;
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};
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#include "G4IMuPairProduction.icc"
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#endif
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