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