Gabriele Cosmo
214 lines
6.9 KiB
C++
214 lines
6.9 KiB
C++
//
|
|
// ********************************************************************
|
|
// * DISCLAIMER *
|
|
// * *
|
|
// * The following disclaimer summarizes all the specific disclaimers *
|
|
// * of contributors to this software. The specific disclaimers,which *
|
|
// * govern, are listed with their locations in: *
|
|
// * http://cern.ch/geant4/license *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. *
|
|
// * *
|
|
// * This code implementation is the intellectual property of the *
|
|
// * GEANT4 collaboration. *
|
|
// * By copying, distributing or modifying the Program (or any work *
|
|
// * based on the Program) you indicate your acceptance of this *
|
|
// * statement, and all its terms. *
|
|
// ********************************************************************
|
|
//
|
|
// $Id: G4eBremsstrahlungModel.hh,v 1.8 2003/07/21 12:52:23 vnivanch Exp $
|
|
// GEANT4 tag $Name: geant4-06-00-patch-01 $
|
|
//
|
|
// -------------------------------------------------------------------
|
|
//
|
|
// GEANT4 Class header file
|
|
//
|
|
//
|
|
// File name: G4eBremsstrahlungModel
|
|
//
|
|
// Author: Vladimir Ivanchenko on base of Laszlo Urban code
|
|
//
|
|
// Creation date: 07.01.2002
|
|
//
|
|
// Modifications:
|
|
//
|
|
// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
|
|
// 24-01-03 Make models region aware (V.Ivanchenko)
|
|
// 13-02-03 Add name (V.Ivanchenko)
|
|
//
|
|
//
|
|
// Class Description:
|
|
//
|
|
// Implementation of energy loss for gamma emission by electrons and
|
|
// positrons
|
|
|
|
// -------------------------------------------------------------------
|
|
//
|
|
|
|
#ifndef G4eBremsstrahlungModel_h
|
|
#define G4eBremsstrahlungModel_h 1
|
|
|
|
#include "G4VEmModel.hh"
|
|
|
|
class G4Element;
|
|
|
|
class G4eBremsstrahlungModel : public G4VEmModel
|
|
{
|
|
|
|
public:
|
|
|
|
G4eBremsstrahlungModel(const G4ParticleDefinition* p = 0, const G4String& nam = "StanBrem");
|
|
|
|
~G4eBremsstrahlungModel();
|
|
|
|
void Initialise(const G4ParticleDefinition*, const G4DataVector&);
|
|
|
|
G4double HighEnergyLimit(const G4ParticleDefinition* p);
|
|
|
|
G4double LowEnergyLimit(const G4ParticleDefinition* p);
|
|
|
|
void SetHighEnergyLimit(G4double e) {highKinEnergy = e;};
|
|
|
|
void SetLowEnergyLimit(G4double e) {lowKinEnergy = e;};
|
|
|
|
G4double MinEnergyCut(const G4ParticleDefinition*,
|
|
const G4MaterialCutsCouple*);
|
|
|
|
G4bool IsInCharge(const G4ParticleDefinition*);
|
|
|
|
G4double ComputeDEDX(const G4MaterialCutsCouple*,
|
|
const G4ParticleDefinition*,
|
|
G4double kineticEnergy,
|
|
G4double cutEnergy);
|
|
|
|
G4double CrossSection(const G4MaterialCutsCouple*,
|
|
const G4ParticleDefinition*,
|
|
G4double kineticEnergy,
|
|
G4double cutEnergy,
|
|
G4double maxEnergy);
|
|
|
|
G4DynamicParticle* SampleSecondary(
|
|
const G4MaterialCutsCouple*,
|
|
const G4DynamicParticle*,
|
|
G4double tmin,
|
|
G4double maxEnergy);
|
|
|
|
std::vector<G4DynamicParticle*>* SampleSecondaries(
|
|
const G4MaterialCutsCouple*,
|
|
const G4DynamicParticle*,
|
|
G4double tmin,
|
|
G4double maxEnergy);
|
|
|
|
void SetLPMflag(G4bool val) {theLPMflag = val;};
|
|
G4bool LPMflag() const {return theLPMflag;};
|
|
|
|
virtual G4double MaxSecondaryEnergy(
|
|
const G4DynamicParticle* dynParticle);
|
|
protected:
|
|
|
|
virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
|
|
G4double kineticEnergy);
|
|
|
|
private:
|
|
|
|
void SetParticle(const G4ParticleDefinition* p);
|
|
|
|
G4double ComputeBremLoss(G4double Z, G4double tkin, G4double cut);
|
|
|
|
G4double PositronCorrFactorLoss(G4double Z, G4double tkin, G4double cut);
|
|
|
|
G4double PositronCorrFactorSigma(G4double Z, G4double tkin, G4double cut);
|
|
|
|
G4double CrossSectionPerAtom(G4double tkin, G4double Z, G4double cut);
|
|
|
|
G4DataVector* ComputePartialSumSigma(const G4Material* material,
|
|
G4double tkin, G4double cut);
|
|
|
|
const G4Element* SelectRandomAtom(const G4MaterialCutsCouple* couple) const;
|
|
|
|
G4double SupressionFunction(const G4Material* material, G4double tkin,
|
|
G4double gammaEnergy);
|
|
|
|
G4double ScreenFunction1(G4double ScreenVariable);
|
|
|
|
G4double ScreenFunction2(G4double ScreenVariable);
|
|
|
|
// hide assignment operator
|
|
G4eBremsstrahlungModel & operator=(const G4eBremsstrahlungModel &right);
|
|
G4eBremsstrahlungModel(const G4eBremsstrahlungModel&);
|
|
|
|
const G4ParticleDefinition* particle;
|
|
G4double highKinEnergy;
|
|
G4double lowKinEnergy;
|
|
G4double minThreshold;
|
|
G4double probsup;
|
|
G4double MigdalConstant;
|
|
G4double LPMconstant;
|
|
G4bool isElectron;
|
|
G4bool theLPMflag;
|
|
std::vector<G4DataVector*> partialSumSigma;
|
|
|
|
};
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
|
inline G4double G4eBremsstrahlungModel::ScreenFunction1(G4double ScreenVariable)
|
|
|
|
// compute the value of the screening function 3*PHI1 - PHI2
|
|
|
|
{
|
|
G4double screenVal;
|
|
|
|
if (ScreenVariable > 1.)
|
|
screenVal = 42.24 - 8.368*log(ScreenVariable+0.952);
|
|
else
|
|
screenVal = 42.392 - ScreenVariable* (7.796 - 1.961*ScreenVariable);
|
|
|
|
return screenVal;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
|
inline
|
|
G4double G4eBremsstrahlungModel::ScreenFunction2(G4double ScreenVariable)
|
|
|
|
// compute the value of the screening function 1.5*PHI1 - 0.5*PHI2
|
|
|
|
{
|
|
G4double screenVal;
|
|
|
|
if (ScreenVariable > 1.)
|
|
screenVal = 42.24 - 8.368*log(ScreenVariable+0.952);
|
|
else
|
|
screenVal = 41.734 - ScreenVariable* (6.484 - 1.250*ScreenVariable);
|
|
|
|
return screenVal;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
|
inline
|
|
G4double G4eBremsstrahlungModel::MaxSecondaryEnergy(
|
|
const G4DynamicParticle* dynParticle)
|
|
{
|
|
return dynParticle->GetKineticEnergy();
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
|
inline
|
|
G4double G4eBremsstrahlungModel::MaxSecondaryEnergy(
|
|
const G4ParticleDefinition*,
|
|
G4double kineticEnergy)
|
|
{
|
|
return kineticEnergy;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
|
#endif
|