| 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // $Id: G4VEmModel.cc,v 1.8 2007/09/25 10:19:07 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-01-patch-02 $ |
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| 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4VEmModel |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 25.07.2005 |
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| 39 | // |
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| 40 | // Modifications: |
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| 41 | // 25.10.2005 Set default highLimit=100.TeV (V.Ivanchenko) |
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| 42 | // 06.02.2006 add method ComputeMeanFreePath() (mma) |
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| 43 | // |
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| 44 | // |
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| 45 | // Class Description: |
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| 46 | // |
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| 47 | // Abstract interface to energy loss models |
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| 48 | |
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| 49 | // ------------------------------------------------------------------- |
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| 50 | // |
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| 51 | |
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| 52 | #include "G4VEmModel.hh" |
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| 53 | |
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| 54 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 56 | |
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| 57 | G4VEmModel::G4VEmModel(const G4String& nam): |
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| 58 | lowLimit(0.1*keV), highLimit(100.0*TeV), fluc(0), name(nam), pParticleChange(0) |
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| 59 | {} |
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| 60 | |
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| 61 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 62 | |
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| 63 | G4VEmModel::~G4VEmModel() |
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| 64 | {} |
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| 65 | |
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| 66 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 67 | |
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| 68 | G4double G4VEmModel::CrossSectionPerVolume(const G4Material* material, |
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| 69 | const G4ParticleDefinition* p, |
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| 70 | G4double ekin, |
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| 71 | G4double emin, |
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| 72 | G4double emax) |
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| 73 | { |
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| 74 | G4double cross = 0.0; |
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| 75 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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| 76 | const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume(); |
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| 77 | size_t nelm = material->GetNumberOfElements(); |
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| 78 | for (size_t i=0; i<nelm; i++) { |
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| 79 | const G4Element* elm = (*theElementVector)[i]; |
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| 80 | cross += theAtomNumDensityVector[i]* |
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| 81 | ComputeCrossSectionPerAtom(p,ekin,elm->GetZ(),elm->GetN(),emin,emax); |
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| 82 | xsec[i] = cross; |
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| 83 | } |
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| 84 | return cross; |
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| 85 | } |
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| 86 | |
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| 87 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 88 | |
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| 89 | G4double G4VEmModel::ComputeMeanFreePath(const G4ParticleDefinition* p, |
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| 90 | G4double ekin, |
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| 91 | const G4Material* material, |
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| 92 | G4double emin, |
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| 93 | G4double emax) |
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| 94 | { |
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| 95 | G4double mfp = DBL_MAX; |
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| 96 | G4double cross = CrossSectionPerVolume(material,p,ekin,emin,emax); |
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| 97 | if (cross > DBL_MIN) mfp = 1./cross; |
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| 98 | return mfp; |
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| 99 | } |
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| 100 | |
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| 101 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 102 | |
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| 103 | |
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