Gabriele Cosmo
158 lines
5.3 KiB
C++
158 lines
5.3 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: G4MuBetheBlochModel.hh,v 1.17 2007/05/22 17:35:58 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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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: G4MuBetheBlochModel
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//
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// Author: Vladimir Ivanchenko on base of Laszlo Urban code
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//
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// Creation date: 09.08.2002
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//
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// Modifications:
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//
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// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
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// 24-01-03 Make models region aware (V.Ivanchenko)
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// 13-02-03 Add Nama (V.Ivanchenko)
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// 10-02-04 Calculation of radiative corrections using R.Kokoulin model (V.I)
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// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
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// 12-04-05 Add usage of G4EmCorrections (V.Ivanchenko)
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// 13-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
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//
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//
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// Class Description:
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//
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// Implementation of Bethe-Bloch model of energy loss and
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// delta-electron production by heavy charged particles
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// -------------------------------------------------------------------
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//
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#ifndef G4MuBetheBlochModel_h
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#define G4MuBetheBlochModel_h 1
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#include "G4VEmModel.hh"
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class G4ParticleChangeForLoss;
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class G4EmCorrections;
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class G4MuBetheBlochModel : public G4VEmModel
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{
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public:
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G4MuBetheBlochModel(const G4ParticleDefinition* p = 0,
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const G4String& nam = "MuBetheBloch");
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virtual ~G4MuBetheBlochModel();
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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 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
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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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// hide assignment operator
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G4MuBetheBlochModel & operator=(const G4MuBetheBlochModel &right);
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G4MuBetheBlochModel(const G4MuBetheBlochModel&);
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const G4ParticleDefinition* particle;
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G4ParticleDefinition* theElectron;
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G4ParticleChangeForLoss* fParticleChange;
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G4EmCorrections* corr;
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G4double limitKinEnergy;
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G4double logLimitKinEnergy;
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G4double mass;
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G4double massSquare;
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G4double ratio;
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G4double twoln10;
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G4double bg2lim;
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G4double taulim;
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G4double alphaprime;
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static G4double xgi[8],wgi[8];
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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inline G4double G4MuBetheBlochModel::MaxSecondaryEnergy(
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const G4ParticleDefinition*,
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G4double kinEnergy)
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{
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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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#endif
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