| 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 | // 080319 Compilation warnings - gcc-4.3.0 fix by T. Koi
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| 32 | //
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| 33 | #include "G4NeutronHPElastic.hh"
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| 34 | #include "G4NeutronHPElasticFS.hh"
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| 35 |
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| 36 | G4NeutronHPElastic::G4NeutronHPElastic()
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| 37 | :G4HadronicInteraction("NeutronHPElastic")
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| 38 | {
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| 39 | overrideSuspension = false;
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| 40 | G4NeutronHPElasticFS * theFS = new G4NeutronHPElasticFS;
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| 41 | if(!getenv("G4NEUTRONHPDATA"))
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| 42 | throw G4HadronicException(__FILE__, __LINE__, "Please setenv G4NEUTRONHPDATA to point to the neutron cross-section files.");
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| 43 | dirName = getenv("G4NEUTRONHPDATA");
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| 44 | G4String tString = "/Elastic/";
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| 45 | dirName = dirName + tString;
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| 46 | // G4cout <<"G4NeutronHPElastic::G4NeutronHPElastic testit "<<dirName<<G4endl;
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| 47 | numEle = G4Element::GetNumberOfElements();
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| 48 | theElastic = new G4NeutronHPChannel[numEle];
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| 49 | for (G4int i=0; i<numEle; i++)
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| 50 | {
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| 51 | theElastic[i].Init((*(G4Element::GetElementTable()))[i], dirName);
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| 52 | while(!theElastic[i].Register(theFS)) ;
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| 53 | }
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| 54 | delete theFS;
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| 55 | SetMinEnergy(0.*eV);
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| 56 | SetMaxEnergy(20.*MeV);
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| 57 | }
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| 58 |
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| 59 | G4NeutronHPElastic::~G4NeutronHPElastic()
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| 60 | {
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| 61 | delete [] theElastic;
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| 62 | }
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| 63 |
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| 64 | #include "G4NeutronHPThermalBoost.hh"
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| 65 |
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| 66 | G4HadFinalState * G4NeutronHPElastic::ApplyYourself(const G4HadProjectile& aTrack, G4Nucleus& )
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| 67 | {
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| 68 | const G4Material * theMaterial = aTrack.GetMaterial();
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| 69 | G4int n = theMaterial->GetNumberOfElements();
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| 70 | G4int index = theMaterial->GetElement(0)->GetIndex();
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| 71 | if(n!=1)
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| 72 | {
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| 73 | G4int i;
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| 74 | xSec = new G4double[n];
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| 75 | G4double sum=0;
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| 76 | const G4double * NumAtomsPerVolume = theMaterial->GetVecNbOfAtomsPerVolume();
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| 77 | G4double rWeight;
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| 78 | G4NeutronHPThermalBoost aThermalE;
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| 79 | for (i=0; i<n; i++)
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| 80 | {
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| 81 | index = theMaterial->GetElement(i)->GetIndex();
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| 82 | rWeight = NumAtomsPerVolume[i];
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| 83 | xSec[i] = theElastic[index].GetXsec(aThermalE.GetThermalEnergy(aTrack,
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| 84 | theMaterial->GetElement(i),
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| 85 | theMaterial->GetTemperature()));
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| 86 | xSec[i] *= rWeight;
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| 87 | sum+=xSec[i];
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| 88 | }
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| 89 | G4double random = G4UniformRand();
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| 90 | G4double running = 0;
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| 91 | for (i=0; i<n; i++)
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| 92 | {
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| 93 | running += xSec[i];
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| 94 | index = theMaterial->GetElement(i)->GetIndex();
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| 95 | //if(random<=running/sum) break;
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| 96 | if( sum == 0 || random <= running/sum ) break;
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| 97 | }
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| 98 | delete [] xSec;
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| 99 | // it is element-wise initialised.
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| 100 | }
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| 101 | G4HadFinalState* finalState = theElastic[index].ApplyYourself(aTrack);
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| 102 | if (overrideSuspension) finalState->SetStatusChange(isAlive);
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| 103 | return finalState;
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| 104 | }
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