Gabriele Cosmo
192 lines
6.4 KiB
C++
192 lines
6.4 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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// $Id: G4BraggModel.hh,v 1.9 2006/06/29 19:50:08 gunter Exp $
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// GEANT4 tag $Name: geant4-08-02 $
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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: G4BraggModel
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 03.01.2002
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//
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// Modifications:
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// 23-12-02 V.Ivanchenko change interface in order to moveto cut per region
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// 24-01-03 Make models region aware (V.Ivanchenko)
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// 13-02-03 Add name (V.Ivanchenko)
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// 12-11-03 Fix for GenericIons (V.Ivanchenko)
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// 11-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
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// 15-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
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// 25-04-06 Add stopping data from PSTAR (V.Ivanchenko)
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//
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// Class Description:
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//
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// Implementation of energy loss and delta-electron production
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// by heavy slow charged particles using eveluated data
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// -------------------------------------------------------------------
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//
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#ifndef G4BraggModel_h
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#define G4BraggModel_h 1
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#include "G4VEmModel.hh"
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#include "G4PSTARStopping.hh"
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class G4ParticleChangeForLoss;
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class G4BraggModel : public G4VEmModel
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{
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public:
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G4BraggModel(const G4ParticleDefinition* p = 0,
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const G4String& nam = "Bragg");
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virtual ~G4BraggModel();
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virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
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G4double MinEnergyCut(const G4ParticleDefinition*,
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const G4MaterialCutsCouple*);
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virtual G4double ComputeCrossSectionPerElectron(
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy,
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G4double maxEnergy);
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virtual G4double ComputeCrossSectionPerAtom(
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double Z, G4double A,
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G4double cutEnergy,
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G4double maxEnergy);
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virtual G4double CrossSectionPerVolume(const G4Material*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy,
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G4double maxEnergy);
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virtual G4double ComputeDEDXPerVolume(const G4Material*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy);
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virtual std::vector<G4DynamicParticle*>* SampleSecondaries(
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double tmin,
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G4double maxEnergy);
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protected:
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G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
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G4double kinEnergy);
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private:
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void SetParticle(const G4ParticleDefinition* p);
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G4bool HasMaterial(const G4Material* material);
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G4double StoppingPower(const G4Material* material,
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G4double kineticEnergy);
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G4double ElectronicStoppingPower(G4double z,
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G4double kineticEnergy) const;
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void SetMoleculaNumber(G4int number) {iMolecula = number;};
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G4double DEDX(const G4Material* material, G4double kineticEnergy);
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G4bool MolecIsInZiegler1988(const G4Material* material);
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G4double ChemicalFactor(G4double kineticEnergy, G4double eloss125) const;
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void SetExpStopPower125(G4double value) {expStopPower125 = value;};
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// hide assignment operator
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G4BraggModel & operator=(const G4BraggModel &right);
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G4BraggModel(const G4BraggModel&);
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const G4ParticleDefinition* particle;
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G4ParticleDefinition* theElectron;
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G4ParticleChangeForLoss* fParticleChange;
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G4PSTARStopping pstar;
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G4double mass;
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G4double spin;
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G4double chargeSquare;
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G4double massRate;
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G4double ratio;
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G4double highKinEnergy;
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G4double lowKinEnergy;
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G4double lowestKinEnergy;
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G4double protonMassAMU;
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G4double theZieglerFactor;
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G4double expStopPower125; // Experimental Stopping power at 125keV
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G4int iMolecula; // index in the molecula's table
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G4bool isIon;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4BraggModel::MaxSecondaryEnergy(
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const G4ParticleDefinition* pd,
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G4double kinEnergy)
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{
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if(pd != particle) SetParticle(pd);
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G4double tau = kinEnergy/mass;
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G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
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(1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
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return tmax;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline void G4BraggModel::SetParticle(const G4ParticleDefinition* p)
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{
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particle = p;
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mass = particle->GetPDGMass();
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spin = particle->GetPDGSpin();
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G4double q = particle->GetPDGCharge()/eplus;
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chargeSquare = q*q;
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massRate = mass/proton_mass_c2;
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ratio = electron_mass_c2/mass;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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