| 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 | // 080721 To be "ClearHistories" effective, the selection scheme of angular distribution is modified by T. Koi
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| 31 | //
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| 32 | //
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| 33 | #include "G4NeutronHPContEnergyAngular.hh"
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| 34 |
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| 35 | G4ReactionProduct * G4NeutronHPContEnergyAngular::Sample(G4double anEnergy, G4double massCode, G4double /*mass*/)
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| 36 | {
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| 37 | G4ReactionProduct * result;
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| 38 | G4int i(0);
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| 39 | G4int it(0);
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| 40 | for(i=0;i<nEnergy;i++)
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| 41 | {
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| 42 | it = i;
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| 43 | if(theAngular[i].GetEnergy()>anEnergy) break;
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| 44 | }
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| 45 | G4double targetMass = GetTarget()->GetMass();
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| 46 | if(it==0)
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| 47 | {
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| 48 | theAngular[0].SetTarget(GetTarget());
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| 49 | theAngular[0].SetTargetCode(theTargetCode);
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| 50 | theAngular[0].SetPrimary(GetNeutron());
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| 51 | result = theAngular[0].Sample(anEnergy, massCode, targetMass,
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| 52 | theAngularRep, theInterpolation);
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| 53 | currentMeanEnergy = theAngular[0].MeanEnergyOfThisInteraction();
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| 54 | }
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| 55 | else
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| 56 | {
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| 57 | // interpolation through alternating sampling. This needs improvement @@@
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| 58 | // This is the cause of the He3 problem !!!!!!!!
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| 59 | // See to it, if you can improve this.
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| 60 | //080714 TK commnet Randomizing use angular distribution
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| 61 | //080714 TK Always use the upper side distribution. enabling ClearHistories method.
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| 62 | //G4double random = G4UniformRand();
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| 63 | //G4double deltaE = theAngular[it].GetEnergy()-theAngular[it-1].GetEnergy();
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| 64 | //G4double offset = theAngular[it].GetEnergy()-anEnergy;
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| 65 | //if(random<offset/deltaE) it--;
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| 66 | theAngular[it].SetTarget(GetTarget());
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| 67 | theAngular[it].SetTargetCode(theTargetCode);
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| 68 | theAngular[it].SetPrimary(GetNeutron());
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| 69 | result = theAngular[it].Sample(anEnergy, massCode, targetMass,
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| 70 | theAngularRep, theInterpolation);
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| 71 | currentMeanEnergy = theAngular[it].MeanEnergyOfThisInteraction();
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| 72 | }
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| 73 | return result;
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| 74 | }
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| 75 |
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| 76 | G4double G4NeutronHPContEnergyAngular::
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| 77 | MeanEnergyOfThisInteraction()
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| 78 | {
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| 79 | G4double result(0);
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| 80 | if(currentMeanEnergy<-1)
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| 81 | {
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| 82 | throw G4HadronicException(__FILE__, __LINE__, "G4NeutronHPContEnergyAngular: Logical error in Product class");
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| 83 | }
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| 84 | else
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| 85 | {
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| 86 | result = currentMeanEnergy;
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| 87 | }
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| 88 | currentMeanEnergy = -2;
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| 89 | return result;
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| 90 | }
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| 91 |
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| 92 |
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| 93 |
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| 94 | void G4NeutronHPContEnergyAngular::ClearHistories()
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| 95 | {
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| 96 | if ( theAngular!= NULL )
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| 97 | {
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| 98 | for ( G4int i = 0 ; i< nEnergy ; i++ )
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| 99 | theAngular[i].ClearHistories();
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| 100 | }
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| 101 | }
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