[819] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
| 26 | #include "G4ElementIsoCrossSections.hh" |
---|
| 27 | |
---|
| 28 | template <class IsoIsoCrossSectionType> |
---|
| 29 | G4ElementIsoCrossSections<IsoIsoCrossSectionType>:: |
---|
| 30 | G4ElementIsoCrossSections() |
---|
| 31 | { |
---|
| 32 | nIsotopes = 0; |
---|
| 33 | theData = NULL; |
---|
| 34 | } |
---|
| 35 | |
---|
| 36 | template <class IsoIsoCrossSectionType> |
---|
| 37 | G4ElementIsoCrossSections<IsoIsoCrossSectionType>:: |
---|
| 38 | ~G4ElementIsoCrossSections() |
---|
| 39 | { |
---|
| 40 | for(G4int i=0; i<nIsotopes; i++) |
---|
| 41 | { |
---|
| 42 | delete theData[i]; |
---|
| 43 | } |
---|
| 44 | delete theData; |
---|
| 45 | } |
---|
| 46 | |
---|
| 47 | template <class IsoIsoCrossSectionType> |
---|
| 48 | void G4ElementIsoCrossSections<IsoIsoCrossSectionType>:: |
---|
| 49 | Init(const G4Element * anElement) |
---|
| 50 | { |
---|
| 51 | G4int Z = G4int(anElement->GetZ()+0.001); |
---|
| 52 | nIsotopes = anElement->GetNumberOfIsotopes(); |
---|
| 53 | G4bool useIsotopesFromElement = true; |
---|
| 54 | if( nIsotopes == 0 ) |
---|
| 55 | { |
---|
| 56 | nIsotopes += theStableOnes.GetNumberOfIsotopes(Z); |
---|
| 57 | useIsotopesFromElement = false; |
---|
| 58 | } |
---|
| 59 | theData = new IsoIsoCrossSectionType * [nIsotopes]; |
---|
| 60 | if(useIsotopesFromElement) |
---|
| 61 | { |
---|
| 62 | for (G4int i=0; i<nIsotopes; i++) |
---|
| 63 | { |
---|
| 64 | G4int A = anElement->GetIsotope(i)->GetN(); |
---|
| 65 | G4double frac = anElement->GetRelativeAbundanceVector()[i]/perCent; |
---|
| 66 | theData[i] = new IsoIsoCrossSectionType; |
---|
| 67 | theData[i]->Init(A, Z, frac); |
---|
| 68 | } |
---|
| 69 | } |
---|
| 70 | else |
---|
| 71 | { |
---|
| 72 | G4int first = theStableOnes.GetFirstIsotope(Z); |
---|
| 73 | for(G4int i=0; i<theStableOnes.GetNumberOfIsotopes(Z); i++) |
---|
| 74 | { |
---|
| 75 | G4int A = theStableOnes.GetIsotopeNucleonCount(first+i); |
---|
| 76 | G4double frac = theStableOnes.GetAbundance(first+i); |
---|
| 77 | theData[i] = new IsoIsoCrossSectionType; |
---|
| 78 | theData[i]->Init(A, Z, frac); |
---|
| 79 | } |
---|
| 80 | } |
---|
| 81 | } |
---|
| 82 | |
---|
| 83 | template <class IsoIsoCrossSectionType> |
---|
| 84 | G4double G4ElementIsoCrossSections<IsoIsoCrossSectionType>:: |
---|
| 85 | GetCrossSection(G4double anEnergy) |
---|
| 86 | { |
---|
| 87 | G4double result = 0; |
---|
| 88 | for(G4int i=0; i<nIsotopes; i++) |
---|
| 89 | { |
---|
| 90 | result += theData[i]->GetCrossSection(anEnergy); // this is already weighted with relative abundance |
---|
| 91 | } |
---|
| 92 | crossSectionBuffer = result; |
---|
| 93 | return result; |
---|
| 94 | } |
---|
| 95 | |
---|
| 96 | template <class IsoIsoCrossSectionType> |
---|
| 97 | G4IsoResult * G4ElementIsoCrossSections<IsoIsoCrossSectionType>:: |
---|
| 98 | GetProductIsotope(G4double anEnergy) |
---|
| 99 | { |
---|
| 100 | G4double running = 0; |
---|
| 101 | G4int index(0); |
---|
| 102 | G4double random = G4UniformRand(); |
---|
| 103 | for(G4int i=0; i<nIsotopes; i++) |
---|
| 104 | { |
---|
| 105 | running += theData[i]->GetCrossSection(anEnergy); |
---|
| 106 | index = i; |
---|
| 107 | if(running/crossSectionBuffer > random) break; |
---|
| 108 | } |
---|
| 109 | G4String result = theData[index]->GetProductIsotope(anEnergy); |
---|
| 110 | G4Nucleus nucleus(theData[index]->GetA(), theData[index]->GetZ()); |
---|
| 111 | G4IsoResult * theResult = new G4IsoResult(result, nucleus); |
---|
| 112 | return theResult; |
---|
| 113 | } |
---|
| 114 | |
---|
| 115 | |
---|