Gabriele Cosmo
186 lines
7.2 KiB
C++
186 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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//
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// $Id: G4eBremsstrahlung.hh,v 1.14 2002/04/09 17:34:41 vnivanch Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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//
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// ------------ G4eBremsstrahlung physics process ------
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// by Laszlo Urban, 24 July 1996
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//
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// 01-10-96 new type G4OrderedTable; ComputePartialSumSigma()
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// 20-03-97 new energy loss+ionisation+brems scheme, L.Urban
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// 01-09-98 new method PrintInfo()
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// 10-02-00 modifications , new e.m. structure, L.Urban
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// 07-08-00 new cross section/en.loss parametrisation, LPM flag , L.Urban
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// 09-08-01 new methods Store/Retrieve PhysicsTable (mma)
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// 19-09-01 come back to previous process name "eBrem"
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// 29-10-01 all static functions no more inlined (mma)
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// ------------------------------------------------------------
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// Class description
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//
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// This class manages the bremsstrahlung for e-/e+
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// it inherites from G4VContinuousDiscreteProcess via G4VeEnergyLoss.
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//
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// Class description - end
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#ifndef G4eBremsstrahlung_h
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#define G4eBremsstrahlung_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 "G4VeEnergyLoss.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4Gamma.hh"
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#include "G4Electron.hh"
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#include "G4Positron.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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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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class G4eBremsstrahlung : public G4VeEnergyLoss
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{
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public:
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G4eBremsstrahlung(const G4String& processName = "eBrem");
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~G4eBremsstrahlung();
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G4bool IsApplicable(const G4ParticleDefinition&);
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void PrintInfoDefinition();
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void BuildPhysicsTable(const G4ParticleDefinition& ParticleType);
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void BuildLossTable(const G4ParticleDefinition& ParticleType);
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void BuildLambdaTable(const G4ParticleDefinition& ParticleType);
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G4double GetMeanFreePath(const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition );
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G4VParticleChange *PostStepDoIt(const G4Track& track,
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const G4Step& step);
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G4double GetLambda(G4double KineticEnergy,G4Material* material);
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G4bool StorePhysicsTable(G4ParticleDefinition* ,
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const G4String& directory, G4bool);
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// store eLoss and MeanFreePath tables into an external file
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// specified by 'directory' (must exist before invokation)
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G4bool RetrievePhysicsTable(G4ParticleDefinition* ,
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const G4String& directory, G4bool);
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// retrieve eLoss and MeanFreePath tables from an external file
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// specified by 'directory'
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protected:
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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 ComputeCrossSectionPerAtom(
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const G4ParticleDefinition* ParticleType,
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G4double KineticEnergy,
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G4double AtomicNumber,
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G4double GammaEnergyCut);
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private:
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G4double ComputeBremLoss(G4double Z,G4double natom,G4double T,
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G4double Cut,G4double x);
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G4double ComputePositronCorrFactorLoss(G4double AtomicNumber,
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G4double KineticEnergy,
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G4double GammaEnergyCut);
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G4double ComputePositronCorrFactorSigma(G4double AtomicNumber,
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G4double KineticEnergy,
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G4double GammaEnergyCut);
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G4Element* SelectRandomAtom(G4Material* aMaterial) const;
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G4double ScreenFunction1(G4double ScreenVariable);
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G4double ScreenFunction2(G4double ScreenVariable);
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G4double SupressionFunction(const G4Material* aMaterial,
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G4double KineticEnergy,
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G4double GammaEnergy) ;
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G4eBremsstrahlung & operator=(const G4eBremsstrahlung &right);
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G4eBremsstrahlung(const G4eBremsstrahlung&);
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private:
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G4PhysicsTable* theMeanFreePathTable;
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G4OrderedTable PartialSumSigma; // partial sum of total crosssection
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static G4double LowerBoundLambda; // low energy limit of crossection table
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static G4double UpperBoundLambda; // high energy limit of crossection table
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static G4int NbinLambda; // number of bins in the tables
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G4double MinThreshold; // minimun value for the production threshold
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G4double LowestKineticEnergy,HighestKineticEnergy; // bining of the Eloss table
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G4int TotBin; // (from G4VeEnergyLoss)
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static G4double probsup;
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static G4bool LPMflag;
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public:
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static void SetLowerBoundLambda(G4double val);
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static void SetUpperBoundLambda(G4double val);
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static void SetNbinLambda(G4int n);
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static G4double GetLowerBoundLambda();
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static G4double GetUpperBoundLambda();
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static G4int GetNbinLambda();
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static void SetLPMflag(G4bool val);
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static G4bool GetLPMflag();
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "G4eBremsstrahlung.icc"
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#endif
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