[1197] | 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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[1315] | 26 | // $Id: G4CHIPSElastic.cc,v 1.4 2010/01/13 15:42:06 mkossov Exp $ |
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[1340] | 27 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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[1197] | 28 | // |
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| 29 | //--------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // Geant4 Class : G4CHIPSElastic |
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| 32 | // |
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| 33 | // Author : V.Ivanchenko 29 June 2009 |
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| 34 | // |
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| 35 | // Modified: |
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[1315] | 36 | // 13.01.10: M.Kosov: Use G4Q(Pr/Neut)ElasticCS instead of G4QElasticCS |
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[1197] | 37 | // |
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| 38 | //--------------------------------------------------------------------- |
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| 39 | // CHIPS model of hadron elastic scattering |
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| 40 | // |
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| 41 | |
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| 42 | #include "G4CHIPSElastic.hh" |
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| 43 | #include "G4VQCrossSection.hh" |
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| 44 | #include "G4ParticleDefinition.hh" |
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[1315] | 45 | #include "G4QProtonElasticCrossSection.hh" |
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| 46 | #include "G4QNeutronElasticCrossSection.hh" |
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[1197] | 47 | |
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[1315] | 48 | G4VQCrossSection* G4CHIPSElastic::pxsManager = 0; |
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| 49 | G4VQCrossSection* G4CHIPSElastic::nxsManager = 0; |
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[1197] | 50 | |
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| 51 | G4CHIPSElastic::G4CHIPSElastic() : G4VHadronElastic("hElasticCHIPS") |
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| 52 | { |
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[1315] | 53 | if(!pxsManager) |
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| 54 | { |
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| 55 | pxsManager = G4QProtonElasticCrossSection::GetPointer(); |
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| 56 | nxsManager = G4QNeutronElasticCrossSection::GetPointer(); |
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| 57 | } |
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[1197] | 58 | } |
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| 59 | |
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| 60 | G4CHIPSElastic::~G4CHIPSElastic() |
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| 61 | {} |
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| 62 | |
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| 63 | G4double |
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| 64 | G4CHIPSElastic::SampleInvariantT(const G4ParticleDefinition* p, |
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| 65 | G4double plab, G4int Z, G4int A) |
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| 66 | { |
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| 67 | G4int N = A - Z; |
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| 68 | if(Z == 1 && N == 2) N = 1; |
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| 69 | else if(Z == 2 && N == 1) N = 2; |
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| 70 | G4int projPDG = p->GetPDGEncoding(); |
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[1315] | 71 | G4double cs = 0.; |
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| 72 | if (projPDG==2212) cs = pxsManager->GetCrossSection(false,plab,Z,N,projPDG); |
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| 73 | else if(projPDG==2112) cs = nxsManager->GetCrossSection(false,plab,Z,N,projPDG); |
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[1197] | 74 | G4double t = 0.0; |
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[1315] | 75 | if(cs > 0.0) |
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| 76 | { |
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| 77 | if (projPDG==2212) t = pxsManager->GetExchangeT(Z,N,projPDG); |
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| 78 | else if(projPDG==2112) t = nxsManager->GetExchangeT(Z,N,projPDG); |
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| 79 | } |
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[1197] | 80 | else t = G4VHadronElastic::SampleInvariantT(p, plab, Z, A); |
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| 81 | return t; |
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| 82 | } |
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| 83 | |
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