| 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 | // neutron_hp -- source file |
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| 27 | // J.P. Wellisch, Nov-1996 |
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| 28 | // A prototype of the low energy neutron transport model. |
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| 29 | // |
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| 30 | // 070523 bug fix for G4FPE_DEBUG on by A. Howard ( and T. Koi) |
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| 31 | // 08-08-06 delete unnecessary and harmed declaration; Bug Report[857] |
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| 32 | // |
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| 33 | #include "G4NeutronHPFission.hh" |
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| 34 | |
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| 35 | G4NeutronHPFission::G4NeutronHPFission() |
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| 36 | :G4HadronicInteraction("NeutronHPFission") |
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| 37 | { |
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| 38 | SetMinEnergy( 0.0 ); |
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| 39 | SetMaxEnergy( 20.*MeV ); |
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| 40 | if(!getenv("G4NEUTRONHPDATA")) |
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| 41 | throw G4HadronicException(__FILE__, __LINE__, "Please setenv G4NEUTRONHPDATA to point to the neutron cross-section files."); |
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| 42 | dirName = getenv("G4NEUTRONHPDATA"); |
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| 43 | G4String tString = "/Fission/"; |
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| 44 | dirName = dirName + tString; |
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| 45 | numEle = G4Element::GetNumberOfElements(); |
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| 46 | theFission = new G4NeutronHPChannel[numEle]; |
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| 47 | |
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| 48 | for (G4int i=0; i<numEle; i++) |
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| 49 | { |
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| 50 | if((*(G4Element::GetElementTable()))[i]->GetZ()>89) |
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| 51 | { |
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| 52 | theFission[i].Init((*(G4Element::GetElementTable()))[i], dirName); |
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| 53 | theFission[i].Register(&theFS); |
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| 54 | } |
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| 55 | } |
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| 56 | } |
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| 57 | |
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| 58 | G4NeutronHPFission::~G4NeutronHPFission() |
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| 59 | { |
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| 60 | delete [] theFission; |
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| 61 | } |
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| 62 | |
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| 63 | #include "G4NeutronHPThermalBoost.hh" |
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| 64 | G4HadFinalState * G4NeutronHPFission::ApplyYourself(const G4HadProjectile& aTrack, G4Nucleus& ) |
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| 65 | { |
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| 66 | const G4Material * theMaterial = aTrack.GetMaterial(); |
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| 67 | G4int n = theMaterial->GetNumberOfElements(); |
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| 68 | G4int index = theMaterial->GetElement(0)->GetIndex(); |
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| 69 | if(n!=1) |
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| 70 | { |
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| 71 | xSec = new G4double[n]; |
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| 72 | G4double sum=0; |
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| 73 | G4int i; |
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| 74 | const G4double * NumAtomsPerVolume = theMaterial->GetVecNbOfAtomsPerVolume(); |
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| 75 | G4double rWeight; |
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| 76 | G4NeutronHPThermalBoost aThermalE; |
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| 77 | for (i=0; i<n; i++) |
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| 78 | { |
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| 79 | index = theMaterial->GetElement(i)->GetIndex(); |
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| 80 | rWeight = NumAtomsPerVolume[i]; |
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| 81 | xSec[i] = theFission[index].GetXsec(aThermalE.GetThermalEnergy(aTrack, |
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| 82 | theMaterial->GetElement(i), |
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| 83 | theMaterial->GetTemperature())); |
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| 84 | xSec[i] *= rWeight; |
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| 85 | sum+=xSec[i]; |
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| 86 | } |
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| 87 | G4double random = G4UniformRand(); |
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| 88 | G4double running = 0; |
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| 89 | for (i=0; i<n; i++) |
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| 90 | { |
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| 91 | running += xSec[i]; |
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| 92 | index = theMaterial->GetElement(i)->GetIndex(); |
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| 93 | //if(random<=running/sum) break; |
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| 94 | if( sum == 0 || random <= running/sum ) break; |
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| 95 | } |
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| 96 | delete [] xSec; |
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| 97 | } |
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| 98 | return theFission[index].ApplyYourself(aTrack); |
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| 99 | } |
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| 100 | |
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