Gabriele Cosmo
104 lines
3.9 KiB
C++
104 lines
3.9 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: G4VEmModel.cc,v 1.6 2006/06/29 19:55:17 gunter Exp $
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// GEANT4 tag $Name: geant4-09-00 $
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//
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// -------------------------------------------------------------------
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//
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// GEANT4 Class file
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//
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//
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// File name: G4VEmModel
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 25.07.2005
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//
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// Modifications:
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// 25.10.2005 Set default highLimit=100.TeV (V.Ivanchenko)
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// 06.02.2006 add method ComputeMeanFreePath() (mma)
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//
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//
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// Class Description:
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//
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// Abstract interface to energy loss models
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// -------------------------------------------------------------------
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//
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#include "G4VEmModel.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4VEmModel::G4VEmModel(const G4String& nam):
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lowLimit(0.1*keV), highLimit(100.0*TeV), fluc(0), name(nam), pParticleChange(0)
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4VEmModel::~G4VEmModel()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double G4VEmModel::CrossSectionPerVolume(const G4Material* material,
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const G4ParticleDefinition* p,
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G4double ekin,
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G4double emin,
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G4double emax)
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{
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G4double cross = 0.0;
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const G4ElementVector* theElementVector = material->GetElementVector();
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const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume();
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size_t nelm = material->GetNumberOfElements();
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for (size_t i=0; i<nelm; i++) {
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const G4Element* elm = (*theElementVector)[i];
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cross += theAtomNumDensityVector[i]*
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ComputeCrossSectionPerAtom(p,ekin,elm->GetZ(),elm->GetN(),emin,emax);
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xsec[i] = cross;
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}
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return cross;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double G4VEmModel::ComputeMeanFreePath(const G4ParticleDefinition* p,
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G4double ekin,
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const G4Material* material,
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G4double emin,
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G4double emax)
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{
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G4double mfp = DBL_MAX;
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G4double cross = CrossSectionPerVolume(material,p,ekin,emin,emax);
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if (cross >0.) mfp = 1./cross;
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return mfp;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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