| 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 | // G4MuonNucleusProcess.cc |
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| 27 | // |
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| 28 | // M.Takahata (Makoto.Takahata@cern.ch) |
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| 29 | |
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| 30 | #include "G4MuonNucleusProcess.hh" |
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| 31 | |
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| 32 | |
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| 33 | //----------------------------------------------------------------------------- |
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| 34 | G4MuonNucleusProcess::G4MuonNucleusProcess(const G4String& processName) |
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| 35 | //----------------------------------------------------------------------------- |
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| 36 | : G4LeptonHadronProcess( processName) |
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| 37 | { |
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| 38 | theInteractionModel = new G4MuonNucleusInteractionModel; |
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| 39 | } |
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| 40 | |
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| 41 | |
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| 42 | //----------------------------------------------------------------------------- |
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| 43 | G4MuonNucleusProcess::~G4MuonNucleusProcess() |
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| 44 | //----------------------------------------------------------------------------- |
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| 45 | { |
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| 46 | delete theInteractionModel; |
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| 47 | } |
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| 48 | |
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| 49 | //----------------------------------------------------------------------------- |
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| 50 | G4double |
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| 51 | G4MuonNucleusProcess::GetMeanFreePath( const G4Track &muonTrack, |
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| 52 | G4double, |
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| 53 | G4ForceCondition * ) |
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| 54 | //----------------------------------------------------------------------------- |
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| 55 | { |
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| 56 | G4Material *aMaterial = muonTrack.GetMaterial(); |
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| 57 | |
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| 58 | const G4double* theAtomicNumDensityVector |
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| 59 | = aMaterial->GetAtomicNumDensityVector(); |
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| 60 | const G4int theNumberOfElements |
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| 61 | = aMaterial->GetNumberOfElements(); |
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| 62 | |
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| 63 | G4double macroscopicCrossSection = 0.0; |
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| 64 | for(G4int iel=0; iel<theNumberOfElements; iel++) |
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| 65 | { |
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| 66 | macroscopicCrossSection |
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| 67 | += theAtomicNumDensityVector[iel] |
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| 68 | *theInteractionModel->computeMicroscopicCrossSection(muonTrack); |
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| 69 | } |
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| 70 | |
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| 71 | if( macroscopicCrossSection > 0.0 ) { |
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| 72 | return 1.0/macroscopicCrossSection; |
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| 73 | } else { |
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| 74 | return DBL_MAX; |
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| 75 | } |
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| 76 | |
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| 77 | } |
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