[819] | 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 | // $Id: G4RPGPionSuppression.cc,v 1.1 2007/07/18 21:04:20 dennis Exp $ |
---|
[1007] | 27 | // GEANT4 tag $Name: geant4-09-02 $ |
---|
[819] | 28 | // |
---|
| 29 | |
---|
| 30 | #include "G4RPGPionSuppression.hh" |
---|
| 31 | #include "Randomize.hh" |
---|
| 32 | #include <iostream> |
---|
| 33 | #include "G4HadReentrentException.hh" |
---|
| 34 | #include <signal.h> |
---|
| 35 | |
---|
| 36 | |
---|
| 37 | G4RPGPionSuppression::G4RPGPionSuppression() |
---|
| 38 | : G4RPGReaction() {} |
---|
| 39 | |
---|
| 40 | |
---|
| 41 | G4bool G4RPGPionSuppression:: |
---|
| 42 | ReactionStage(const G4HadProjectile* /*originalIncident*/, |
---|
| 43 | G4ReactionProduct& modifiedOriginal, |
---|
| 44 | G4bool& incidentHasChanged, |
---|
| 45 | const G4DynamicParticle* /*originalTarget*/, |
---|
| 46 | G4ReactionProduct& targetParticle, |
---|
| 47 | G4bool& targetHasChanged, |
---|
| 48 | const G4Nucleus& targetNucleus, |
---|
| 49 | G4ReactionProduct& currentParticle, |
---|
| 50 | G4FastVector<G4ReactionProduct,256>& vec, |
---|
| 51 | G4int& vecLen, |
---|
| 52 | G4bool /*leadFlag*/, |
---|
| 53 | G4ReactionProduct& /*leadingStrangeParticle*/) |
---|
| 54 | { |
---|
| 55 | // This code was originally in the fortran code TWOCLU |
---|
| 56 | // |
---|
| 57 | // Suppress charged pions, for various reasons |
---|
| 58 | // |
---|
| 59 | G4double mOriginal = modifiedOriginal.GetMass()/GeV; |
---|
| 60 | G4double etOriginal = modifiedOriginal.GetTotalEnergy()/GeV; |
---|
| 61 | G4double targetMass = targetParticle.GetDefinition()->GetPDGMass()/GeV; |
---|
| 62 | G4double cmEnergy = std::sqrt( mOriginal*mOriginal + targetMass*targetMass + |
---|
| 63 | 2.0*targetMass*etOriginal ); |
---|
| 64 | G4double eAvailable = cmEnergy - mOriginal - targetMass; |
---|
| 65 | for (G4int i = 0; i < vecLen; i++) eAvailable -= vec[i]->GetMass()/GeV; |
---|
| 66 | |
---|
| 67 | const G4double atomicWeight = targetNucleus.GetN(); |
---|
| 68 | const G4double atomicNumber = targetNucleus.GetZ(); |
---|
| 69 | const G4double pOriginal = modifiedOriginal.GetTotalMomentum()/GeV; |
---|
| 70 | |
---|
| 71 | G4ParticleDefinition *aPiMinus = G4PionMinus::PionMinus(); |
---|
| 72 | G4ParticleDefinition *aPiPlus = G4PionPlus::PionPlus(); |
---|
| 73 | G4ParticleDefinition* aPiZero = G4PionZero::PionZero(); |
---|
| 74 | G4ParticleDefinition *aProton = G4Proton::Proton(); |
---|
| 75 | G4ParticleDefinition *aNeutron = G4Neutron::Neutron(); |
---|
| 76 | G4double piMass = aPiPlus->GetPDGMass()/GeV; |
---|
| 77 | G4double nucleonMass = aNeutron->GetPDGMass()/GeV; |
---|
| 78 | |
---|
| 79 | const G4bool antiTest = |
---|
| 80 | modifiedOriginal.GetDefinition() != G4AntiProton::AntiProton() && |
---|
| 81 | modifiedOriginal.GetDefinition() != G4AntiNeutron::AntiNeutron() && |
---|
| 82 | modifiedOriginal.GetDefinition() != G4AntiLambda::AntiLambda() && |
---|
| 83 | modifiedOriginal.GetDefinition() != G4AntiSigmaPlus::AntiSigmaPlus() && |
---|
| 84 | modifiedOriginal.GetDefinition() != G4AntiSigmaMinus::AntiSigmaMinus() && |
---|
| 85 | modifiedOriginal.GetDefinition() != G4AntiXiZero::AntiXiZero() && |
---|
| 86 | modifiedOriginal.GetDefinition() != G4AntiXiMinus::AntiXiMinus() && |
---|
| 87 | modifiedOriginal.GetDefinition() != G4AntiOmegaMinus::AntiOmegaMinus(); |
---|
| 88 | |
---|
| 89 | if( antiTest && ( |
---|
| 90 | currentParticle.GetDefinition() == aPiPlus || |
---|
| 91 | currentParticle.GetDefinition() == aPiZero || |
---|
| 92 | currentParticle.GetDefinition() == aPiMinus ) && |
---|
| 93 | ( G4UniformRand() <= (10.0-pOriginal)/6.0 ) && |
---|
| 94 | ( G4UniformRand() <= atomicWeight/300.0 ) ) |
---|
| 95 | { |
---|
| 96 | if (eAvailable > nucleonMass - piMass) { |
---|
| 97 | if( G4UniformRand() > atomicNumber/atomicWeight ) |
---|
| 98 | currentParticle.SetDefinitionAndUpdateE( aNeutron ); |
---|
| 99 | else |
---|
| 100 | currentParticle.SetDefinitionAndUpdateE( aProton ); |
---|
| 101 | incidentHasChanged = true; |
---|
| 102 | } |
---|
| 103 | } |
---|
| 104 | |
---|
| 105 | if( antiTest && ( |
---|
| 106 | targetParticle.GetDefinition() == aPiPlus || |
---|
| 107 | targetParticle.GetDefinition() == aPiZero || |
---|
| 108 | targetParticle.GetDefinition() == aPiMinus ) && |
---|
| 109 | ( G4UniformRand() <= (10.0-pOriginal)/6.0 ) && |
---|
| 110 | ( G4UniformRand() <= atomicWeight/300.0 ) ) |
---|
| 111 | { |
---|
| 112 | if (eAvailable > nucleonMass - piMass) { |
---|
| 113 | if( G4UniformRand() > atomicNumber/atomicWeight ) |
---|
| 114 | targetParticle.SetDefinitionAndUpdateE( aNeutron ); |
---|
| 115 | else |
---|
| 116 | targetParticle.SetDefinitionAndUpdateE( aProton ); |
---|
| 117 | targetHasChanged = true; |
---|
| 118 | } |
---|
| 119 | } |
---|
| 120 | |
---|
| 121 | for( G4int i=0; i<vecLen; ++i ) |
---|
| 122 | { |
---|
| 123 | if( antiTest && ( |
---|
| 124 | vec[i]->GetDefinition() == aPiPlus || |
---|
| 125 | vec[i]->GetDefinition() == aPiZero || |
---|
| 126 | vec[i]->GetDefinition() == aPiMinus ) && |
---|
| 127 | ( G4UniformRand() <= (10.0-pOriginal)/6.0 ) && |
---|
| 128 | ( G4UniformRand() <= atomicWeight/300.0 ) ) |
---|
| 129 | { |
---|
| 130 | if (eAvailable > nucleonMass - piMass) { |
---|
| 131 | if( G4UniformRand() > atomicNumber/atomicWeight ) |
---|
| 132 | vec[i]->SetDefinitionAndUpdateE( aNeutron ); |
---|
| 133 | else |
---|
| 134 | vec[i]->SetDefinitionAndUpdateE( aProton ); |
---|
| 135 | } |
---|
| 136 | } |
---|
| 137 | } |
---|
| 138 | |
---|
| 139 | return true; |
---|
| 140 | } |
---|
| 141 | |
---|
| 142 | |
---|
| 143 | /* end of file */ |
---|