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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