Gabriele Cosmo
95 lines
3.8 KiB
C++
95 lines
3.8 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// neutron_hp -- source file
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// J.P. Wellisch, Nov-1996
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// A prototype of the low energy neutron transport model.
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//
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#include "G4NeutronHPElastic.hh"
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#include "G4NeutronHPElasticFS.hh"
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G4NeutronHPElastic::G4NeutronHPElastic()
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{
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G4NeutronHPElasticFS * theFS = new G4NeutronHPElasticFS;
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if(!getenv("NeutronHPCrossSections"))
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G4Exception("Please setenv NeutronHPCrossSections to point to the neutron cross-section files.");
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dirName = getenv("NeutronHPCrossSections");
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G4String tString = "/Elastic/";
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dirName = dirName + tString;
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// G4cout <<"G4NeutronHPElastic::G4NeutronHPElastic testit "<<dirName<<G4endl;
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numEle = G4Element::GetNumberOfElements();
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theElastic = new G4NeutronHPChannel[numEle];
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for (G4int i=0; i<numEle; i++)
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{
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theElastic[i].Init((*(G4Element::GetElementTable()))(i), dirName);
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while(!theElastic[i].Register(theFS));
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}
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delete theFS;
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SetMinEnergy(0.*eV);
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SetMaxEnergy(20.*MeV);
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}
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G4NeutronHPElastic::~G4NeutronHPElastic()
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{
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delete [] theElastic;
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}
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#include "G4NeutronHPThermalBoost.hh"
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G4VParticleChange * G4NeutronHPElastic::ApplyYourself(const G4Track& aTrack, G4Nucleus& aTargetNucleus)
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{
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G4Material * theMaterial = aTrack.GetMaterial();
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G4int n = theMaterial->GetNumberOfElements();
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G4int index = theMaterial->GetElement(0)->GetIndex();
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if(n!=1)
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{
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G4int i;
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G4int it = n-1;
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xSec = new G4double[n];
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G4double sum=0;
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const G4double * NumAtomsPerVolume = theMaterial->GetVecNbOfAtomsPerVolume();
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G4double rWeight;
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G4NeutronHPThermalBoost aThermalE;
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for (i=0; i<n; i++)
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{
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index = theMaterial->GetElement(i)->GetIndex();
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rWeight = NumAtomsPerVolume[i];
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xSec[i] = theElastic[index].GetXsec(aThermalE.GetThermalEnergy(aTrack.GetDynamicParticle(),
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theMaterial->GetElement(i),
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theMaterial->GetTemperature()));
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xSec[i] *= rWeight;
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sum+=xSec[i];
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}
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G4double random = G4UniformRand();
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G4double running = 0;
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for (i=0; i<n; i++)
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{
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running += xSec[i];
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index = theMaterial->GetElement(i)->GetIndex();
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if(random<=running/sum) break;
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}
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delete [] xSec;
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// it is element-wise initialised.
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}
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return theElastic[index].ApplyYourself(aTrack);
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}
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