| 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 | // neutron_hp -- source file
|
|---|
| 27 | // J.P. Wellisch, Nov-1996
|
|---|
| 28 | // A prototype of the low energy neutron transport model.
|
|---|
| 29 | //
|
|---|
| 30 | #include "G4NeutronHPContEnergyAngular.hh"
|
|---|
| 31 |
|
|---|
| 32 | G4ReactionProduct * G4NeutronHPContEnergyAngular::Sample(G4double anEnergy, G4double massCode, G4double /*mass*/)
|
|---|
| 33 | {
|
|---|
| 34 | G4ReactionProduct * result;
|
|---|
| 35 | G4int i(0);
|
|---|
| 36 | G4int it(0);
|
|---|
| 37 | for(i=0;i<nEnergy;i++)
|
|---|
| 38 | {
|
|---|
| 39 | it = i;
|
|---|
| 40 | if(theAngular[i].GetEnergy()>anEnergy) break;
|
|---|
| 41 | }
|
|---|
| 42 | G4double targetMass = GetTarget()->GetMass();
|
|---|
| 43 | if(it==0)
|
|---|
| 44 | {
|
|---|
| 45 | theAngular[0].SetTarget(GetTarget());
|
|---|
| 46 | theAngular[0].SetTargetCode(theTargetCode);
|
|---|
| 47 | theAngular[0].SetPrimary(GetNeutron());
|
|---|
| 48 | result = theAngular[0].Sample(anEnergy, massCode, targetMass,
|
|---|
| 49 | theAngularRep, theInterpolation);
|
|---|
| 50 | currentMeanEnergy = theAngular[0].MeanEnergyOfThisInteraction();
|
|---|
| 51 | }
|
|---|
| 52 | else
|
|---|
| 53 | {
|
|---|
| 54 | // interpolation through alternating sampling. This needs improvement @@@
|
|---|
| 55 | // This is the cause of the He3 problem !!!!!!!!
|
|---|
| 56 | // See to it, if you can improve this.
|
|---|
| 57 | G4double random = G4UniformRand();
|
|---|
| 58 | G4double deltaE = theAngular[it].GetEnergy()-theAngular[it-1].GetEnergy();
|
|---|
| 59 | G4double offset = theAngular[it].GetEnergy()-anEnergy;
|
|---|
| 60 | if(random<offset/deltaE) it--;
|
|---|
| 61 | theAngular[it].SetTarget(GetTarget());
|
|---|
| 62 | theAngular[it].SetTargetCode(theTargetCode);
|
|---|
| 63 | theAngular[it].SetPrimary(GetNeutron());
|
|---|
| 64 | result = theAngular[it].Sample(anEnergy, massCode, targetMass,
|
|---|
| 65 | theAngularRep, theInterpolation);
|
|---|
| 66 | currentMeanEnergy = theAngular[it].MeanEnergyOfThisInteraction();
|
|---|
| 67 | }
|
|---|
| 68 | return result;
|
|---|
| 69 | }
|
|---|
| 70 |
|
|---|
| 71 | G4double G4NeutronHPContEnergyAngular::
|
|---|
| 72 | MeanEnergyOfThisInteraction()
|
|---|
| 73 | {
|
|---|
| 74 | G4double result(0);
|
|---|
| 75 | if(currentMeanEnergy<-1)
|
|---|
| 76 | {
|
|---|
| 77 | throw G4HadronicException(__FILE__, __LINE__, "G4NeutronHPContEnergyAngular: Logical error in Product class");
|
|---|
| 78 | }
|
|---|
| 79 | else
|
|---|
| 80 | {
|
|---|
| 81 | result = currentMeanEnergy;
|
|---|
| 82 | }
|
|---|
| 83 | currentMeanEnergy = -2;
|
|---|
| 84 | return result;
|
|---|
| 85 | }
|
|---|
