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 | #include "G4NeutronIsotopeProduction.hh" |
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27 | |
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28 | G4NeutronIsotopeProduction:: |
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29 | G4NeutronIsotopeProduction() |
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30 | { |
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31 | numberOfElements = G4Element::GetNumberOfElements(); |
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32 | theData = new G4ElementIsoCrossSections<G4NeutronIsoIsoCrossSections> * [numberOfElements]; |
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33 | for(G4int i=0; i< numberOfElements; i++) |
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34 | { |
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35 | theData[i] = new G4ElementIsoCrossSections<G4NeutronIsoIsoCrossSections>; |
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36 | if((*(G4Element::GetElementTable()))[i]->GetZ()>12 && |
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37 | (*(G4Element::GetElementTable()))[i]->GetZ()<84) // @@@@@@ workaround to ne fixed in G4NeutronHPNames. |
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38 | { |
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39 | theData[i]->Init((*(G4Element::GetElementTable()))[i]); |
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40 | } |
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41 | } |
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42 | } |
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43 | |
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44 | G4NeutronIsotopeProduction:: |
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45 | ~G4NeutronIsotopeProduction() |
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46 | { |
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47 | for(G4int i=0; i<numberOfElements; i++) |
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48 | { |
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49 | delete theData[i]; |
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50 | } |
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51 | if(theData!=NULL) delete [] theData; |
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52 | } |
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53 | |
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54 | |
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55 | G4IsoResult * G4NeutronIsotopeProduction:: |
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56 | GetIsotope(const G4Track& aTrack, |
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57 | const G4Nucleus & ) |
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58 | { |
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59 | // is applicable? |
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60 | if(aTrack.GetDynamicParticle()->GetDefinition() != G4Neutron::Neutron()) return NULL; |
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61 | if(aTrack.GetKineticEnergy()>100*MeV) return NULL; |
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62 | |
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63 | // get the isotope |
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64 | G4Material * theMaterial = aTrack.GetMaterial(); |
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65 | G4int nEleInMat = theMaterial->GetNumberOfElements(); |
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66 | for(G4int check = 0; check<nEleInMat; check++) |
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67 | { |
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68 | if(theMaterial->GetElement(check)->GetZ()<13) return NULL; //@@@@@@ workaround to ne fixed in G4NeutronHPNames. |
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69 | if(theMaterial->GetElement(check)->GetZ()>83) return NULL; //@@@@@@ workaround to ne fixed in G4NeutronHPNames. |
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70 | } |
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71 | G4int index(0); |
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72 | G4double * xSec = new G4double[nEleInMat]; |
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73 | G4double sum = 0; |
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74 | { |
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75 | for(G4int i=0; i<nEleInMat; i++) |
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76 | { |
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77 | index = theMaterial->GetElement(i)->GetIndex(); |
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78 | xSec[i] = theData[index]->GetCrossSection(aTrack.GetKineticEnergy()); |
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79 | sum += xSec[i]; |
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80 | } |
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81 | } |
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82 | G4double random = G4UniformRand(); |
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83 | G4double running = 0; |
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84 | { |
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85 | for(G4int i=0; i<nEleInMat; i++) |
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86 | { |
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87 | running += xSec[i]; |
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88 | index = theMaterial->GetElement(i)->GetIndex(); |
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89 | if(random<=running/sum) break; |
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90 | } |
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91 | } |
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92 | delete [] xSec; |
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93 | G4IsoResult * result = theData[index]->GetProductIsotope(aTrack.GetKineticEnergy()); |
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94 | return result; |
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95 | } |
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96 | |
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