[819] | 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 | // |
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| 27 | // $Id: G4LEAntiKaonZeroInelastic.cc,v 1.10 2006/06/29 20:44:39 gunter Exp $ |
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[1340] | 28 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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[819] | 29 | // |
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| 30 | // Hadronic Process: Low Energy KaonZeroLong Inelastic Process |
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| 31 | // J.L. Chuma, TRIUMF, 11-Feb-1997 |
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| 32 | // Last modified: 27-Mar-1997 |
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| 33 | // Modified by J.L.Chuma 30-Apr-97: added originalTarget for CalculateMomenta |
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| 34 | |
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| 35 | #include "G4LEAntiKaonZeroInelastic.hh" |
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| 36 | #include "Randomize.hh" |
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| 37 | #include "G4HadReentrentException.hh" |
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| 38 | |
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| 39 | G4HadFinalState * |
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| 40 | G4LEAntiKaonZeroInelastic::ApplyYourself( const G4HadProjectile &aTrack, |
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| 41 | G4Nucleus &targetNucleus ) |
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| 42 | { |
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| 43 | const G4HadProjectile *originalIncident = &aTrack; |
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| 44 | // |
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| 45 | // create the target particle |
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| 46 | // |
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| 47 | G4DynamicParticle *originalTarget = targetNucleus.ReturnTargetParticle(); |
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| 48 | |
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| 49 | if( verboseLevel > 1 ) |
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| 50 | { |
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| 51 | const G4Material *targetMaterial = aTrack.GetMaterial(); |
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| 52 | G4cout << "G4LEAntiKaonZeroInelastic::ApplyYourself called" << G4endl; |
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| 53 | G4cout << "kinetic energy = " << originalIncident->GetKineticEnergy()/MeV << "MeV, "; |
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| 54 | G4cout << "target material = " << targetMaterial->GetName() << ", "; |
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| 55 | G4cout << "target particle = " << originalTarget->GetDefinition()->GetParticleName() |
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| 56 | << G4endl; |
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| 57 | } |
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| 58 | // |
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| 59 | // Fermi motion and evaporation |
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| 60 | // As of Geant3, the Fermi energy calculation had not been Done |
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| 61 | // |
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| 62 | G4double ek = originalIncident->GetKineticEnergy()/MeV; |
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| 63 | G4double amas = originalIncident->GetDefinition()->GetPDGMass()/MeV; |
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| 64 | G4ReactionProduct modifiedOriginal; |
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| 65 | modifiedOriginal = *originalIncident; |
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| 66 | |
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| 67 | G4double tkin = targetNucleus.Cinema( ek ); |
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| 68 | ek += tkin; |
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| 69 | modifiedOriginal.SetKineticEnergy( ek*MeV ); |
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| 70 | G4double et = ek + amas; |
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| 71 | G4double p = std::sqrt( std::abs((et-amas)*(et+amas)) ); |
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| 72 | G4double pp = modifiedOriginal.GetMomentum().mag()/MeV; |
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| 73 | if( pp > 0.0 ) |
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| 74 | { |
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| 75 | G4ThreeVector momentum = modifiedOriginal.GetMomentum(); |
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| 76 | modifiedOriginal.SetMomentum( momentum * (p/pp) ); |
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| 77 | } |
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| 78 | // |
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| 79 | // calculate black track energies |
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| 80 | // |
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| 81 | tkin = targetNucleus.EvaporationEffects( ek ); |
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| 82 | ek -= tkin; |
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| 83 | modifiedOriginal.SetKineticEnergy( ek*MeV ); |
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| 84 | et = ek + amas; |
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| 85 | p = std::sqrt( std::abs((et-amas)*(et+amas)) ); |
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| 86 | pp = modifiedOriginal.GetMomentum().mag()/MeV; |
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| 87 | if( pp > 0.0 ) |
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| 88 | { |
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| 89 | G4ThreeVector momentum = modifiedOriginal.GetMomentum(); |
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| 90 | modifiedOriginal.SetMomentum( momentum * (p/pp) ); |
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| 91 | } |
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| 92 | G4ReactionProduct currentParticle = modifiedOriginal; |
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| 93 | G4ReactionProduct targetParticle; |
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| 94 | targetParticle = *originalTarget; |
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| 95 | currentParticle.SetSide( 1 ); // incident always goes in forward hemisphere |
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| 96 | targetParticle.SetSide( -1 ); // target always goes in backward hemisphere |
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| 97 | G4bool incidentHasChanged = false; |
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| 98 | G4bool targetHasChanged = false; |
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| 99 | G4bool quasiElastic = false; |
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| 100 | G4FastVector<G4ReactionProduct,GHADLISTSIZE> vec; // vec will contain the secondary particles |
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| 101 | G4int vecLen = 0; |
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| 102 | vec.Initialize( 0 ); |
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| 103 | |
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| 104 | const G4double cutOff = 0.1; |
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| 105 | if( currentParticle.GetKineticEnergy()/MeV > cutOff ) |
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| 106 | Cascade( vec, vecLen, |
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| 107 | originalIncident, currentParticle, targetParticle, |
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| 108 | incidentHasChanged, targetHasChanged, quasiElastic ); |
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| 109 | |
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| 110 | try |
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| 111 | { |
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| 112 | CalculateMomenta( vec, vecLen, |
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| 113 | originalIncident, originalTarget, modifiedOriginal, |
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| 114 | targetNucleus, currentParticle, targetParticle, |
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| 115 | incidentHasChanged, targetHasChanged, quasiElastic ); |
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| 116 | } |
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| 117 | catch(G4HadReentrentException aR) |
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| 118 | { |
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| 119 | aR.Report(G4cout); |
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| 120 | throw G4HadReentrentException(__FILE__, __LINE__, "Bailing out"); |
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| 121 | } |
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| 122 | SetUpChange( vec, vecLen, |
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| 123 | currentParticle, targetParticle, |
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| 124 | incidentHasChanged ); |
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| 125 | |
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| 126 | delete originalTarget; |
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| 127 | return &theParticleChange; |
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| 128 | } |
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| 129 | |
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| 130 | void |
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| 131 | G4LEAntiKaonZeroInelastic::Cascade( |
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| 132 | G4FastVector<G4ReactionProduct,GHADLISTSIZE> &vec, |
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| 133 | G4int& vecLen, |
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| 134 | const G4HadProjectile *originalIncident, |
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| 135 | G4ReactionProduct ¤tParticle, |
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| 136 | G4ReactionProduct &targetParticle, |
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| 137 | G4bool &incidentHasChanged, |
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| 138 | G4bool &targetHasChanged, |
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| 139 | G4bool &quasiElastic ) |
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| 140 | { |
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| 141 | // derived from original FORTRAN code CASK0B by H. Fesefeldt (13-Sep-1987) |
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| 142 | // |
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| 143 | // K0Long undergoes interaction with nucleon within a nucleus. Check if it is |
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| 144 | // energetically possible to produce pions/kaons. In not, assume nuclear excitation |
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| 145 | // occurs and input particle is degraded in energy. No other particles are produced. |
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| 146 | // If reaction is possible, find the correct number of pions/protons/neutrons |
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| 147 | // produced using an interpolation to multiplicity data. Replace some pions or |
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| 148 | // protons/neutrons by kaons or strange baryons according to the average |
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| 149 | // multiplicity per Inelastic reaction. |
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| 150 | // |
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| 151 | const G4double mOriginal = originalIncident->GetDefinition()->GetPDGMass()/MeV; |
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| 152 | const G4double etOriginal = originalIncident->Get4Momentum().e()/MeV; |
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| 153 | const G4double pOriginal = originalIncident->Get4Momentum().vect().mag()/MeV; |
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| 154 | const G4double targetMass = targetParticle.GetMass()/MeV; |
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| 155 | G4double centerofmassEnergy = std::sqrt( mOriginal*mOriginal + |
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| 156 | targetMass*targetMass + |
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| 157 | 2.0*targetMass*etOriginal ); |
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| 158 | G4double availableEnergy = centerofmassEnergy-(targetMass+mOriginal); |
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| 159 | |
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| 160 | static G4bool first = true; |
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| 161 | const G4int numMul = 1200; |
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| 162 | const G4int numSec = 60; |
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| 163 | static G4double protmul[numMul], protnorm[numSec]; // proton constants |
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| 164 | static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants |
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| 165 | // np = number of pi+, nm = number of pi-, nz = number of pi0 |
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| 166 | G4int counter, nt=0, np=0, nm=0, nz=0; |
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| 167 | const G4double c = 1.25; |
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| 168 | const G4double b[] = { 0.7, 0.7 }; |
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| 169 | if( first ) // compute normalization constants, this will only be Done once |
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| 170 | { |
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| 171 | first = false; |
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| 172 | G4int i; |
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| 173 | for( i=0; i<numMul; ++i )protmul[i] = 0.0; |
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| 174 | for( i=0; i<numSec; ++i )protnorm[i] = 0.0; |
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| 175 | counter = -1; |
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| 176 | for( np=0; np<numSec/3; ++np ) |
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| 177 | { |
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| 178 | for( nm=std::max(0,np-2); nm<=np; ++nm ) |
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| 179 | { |
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| 180 | for( nz=0; nz<numSec/3; ++nz ) |
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| 181 | { |
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| 182 | if( ++counter < numMul ) |
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| 183 | { |
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| 184 | nt = np+nm+nz; |
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| 185 | if( nt>0 && nt<=numSec ) |
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| 186 | { |
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| 187 | protmul[counter] = Pmltpc(np,nm,nz,nt,b[0],c); |
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| 188 | protnorm[nt-1] += protmul[counter]; |
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| 189 | } |
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| 190 | } |
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| 191 | } |
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| 192 | } |
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| 193 | } |
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| 194 | for( i=0; i<numMul; ++i )neutmul[i] = 0.0; |
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| 195 | for( i=0; i<numSec; ++i )neutnorm[i] = 0.0; |
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| 196 | counter = -1; |
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| 197 | for( np=0; np<(numSec/3); ++np ) |
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| 198 | { |
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| 199 | for( nm=std::max(0,np-1); nm<=(np+1); ++nm ) |
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| 200 | { |
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| 201 | for( nz=0; nz<numSec/3; ++nz ) |
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| 202 | { |
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| 203 | if( ++counter < numMul ) |
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| 204 | { |
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| 205 | nt = np+nm+nz; |
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| 206 | if( nt>0 && nt<=numSec ) |
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| 207 | { |
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| 208 | neutmul[counter] = Pmltpc(np,nm,nz,nt,b[1],c); |
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| 209 | neutnorm[nt-1] += neutmul[counter]; |
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| 210 | } |
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| 211 | } |
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| 212 | } |
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| 213 | } |
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| 214 | } |
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| 215 | for( i=0; i<numSec; ++i ) |
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| 216 | { |
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| 217 | if( protnorm[i] > 0.0 )protnorm[i] = 1.0/protnorm[i]; |
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| 218 | if( neutnorm[i] > 0.0 )neutnorm[i] = 1.0/neutnorm[i]; |
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| 219 | } |
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| 220 | } // end of initialization |
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| 221 | |
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| 222 | const G4double expxu = 82.; // upper bound for arg. of exp |
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| 223 | const G4double expxl = -expxu; // lower bound for arg. of exp |
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| 224 | G4ParticleDefinition *aKaonMinus = G4KaonMinus::KaonMinus(); |
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| 225 | G4ParticleDefinition *aKaonZS = G4KaonZeroShort::KaonZeroShort(); |
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| 226 | G4ParticleDefinition *aKaonZL = G4KaonZeroLong::KaonZeroLong(); |
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| 227 | G4ParticleDefinition *aNeutron = G4Neutron::Neutron(); |
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| 228 | G4ParticleDefinition *aProton = G4Proton::Proton(); |
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| 229 | G4ParticleDefinition *aPiPlus = G4PionPlus::PionPlus(); |
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| 230 | G4ParticleDefinition *aPiMinus = G4PionMinus::PionMinus(); |
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| 231 | G4ParticleDefinition *aPiZero = G4PionZero::PionZero(); |
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| 232 | G4ParticleDefinition *aLambda = G4Lambda::Lambda(); |
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| 233 | G4ParticleDefinition *aSigmaPlus = G4SigmaPlus::SigmaPlus(); |
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| 234 | G4ParticleDefinition *aSigmaMinus = G4SigmaMinus::SigmaMinus(); |
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| 235 | G4ParticleDefinition *aSigmaZero = G4SigmaZero::SigmaZero(); |
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| 236 | const G4double cech[] = {1.,1.,1.,0.70,0.60,0.55,0.35,0.25,0.18,0.15}; |
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| 237 | G4int iplab = G4int(std::min( 9.0, 5.0*pOriginal*MeV/GeV )); |
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| 238 | if( (pOriginal*MeV/GeV <= 2.0) && (G4UniformRand() < cech[iplab]) ) |
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| 239 | { |
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| 240 | np = nm = nz = nt = 0; |
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| 241 | iplab = G4int(std::min( 19.0, pOriginal*MeV/GeV*10.0 )); |
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| 242 | const G4double cnk0[] = {0.17,0.18,0.17,0.24,0.26,0.20,0.22,0.21,0.34,0.45, |
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| 243 | 0.58,0.55,0.36,0.29,0.29,0.32,0.32,0.33,0.33,0.33}; |
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| 244 | if( G4UniformRand() > cnk0[iplab] ) |
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| 245 | { |
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| 246 | G4double ran = G4UniformRand(); |
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| 247 | if( ran < 0.25 ) // k0Long n --> pi- s+ |
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| 248 | { |
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| 249 | if( targetParticle.GetDefinition() == aNeutron ) |
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| 250 | { |
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| 251 | currentParticle.SetDefinitionAndUpdateE( aPiMinus ); |
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| 252 | targetParticle.SetDefinitionAndUpdateE( aSigmaPlus ); |
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| 253 | incidentHasChanged = true; |
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| 254 | targetHasChanged = true; |
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| 255 | } |
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| 256 | } |
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| 257 | else if( ran < 0.50 ) // k0Long p --> pi+ s0 or k0Long n --> pi0 s0 |
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| 258 | { |
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| 259 | if( targetParticle.GetDefinition() == aNeutron ) |
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| 260 | currentParticle.SetDefinitionAndUpdateE( aPiZero ); |
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| 261 | else |
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| 262 | currentParticle.SetDefinitionAndUpdateE( aPiPlus ); |
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| 263 | targetParticle.SetDefinitionAndUpdateE( aSigmaZero ); |
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| 264 | incidentHasChanged = true; |
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| 265 | targetHasChanged = true; |
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| 266 | } |
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| 267 | else if( ran < 0.75 ) // k0Long n --> pi+ s- |
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| 268 | { |
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| 269 | if( targetParticle.GetDefinition() == aNeutron ) |
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| 270 | { |
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| 271 | currentParticle.SetDefinitionAndUpdateE( aPiPlus ); |
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| 272 | targetParticle.SetDefinitionAndUpdateE( aSigmaMinus ); |
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| 273 | incidentHasChanged = true; |
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| 274 | targetHasChanged = true; |
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| 275 | } |
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| 276 | } |
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| 277 | else // k0Long p --> pi+ L or k0Long n --> pi0 L |
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| 278 | { |
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| 279 | if( targetParticle.GetDefinition() == aNeutron ) |
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| 280 | currentParticle.SetDefinitionAndUpdateE( aPiZero ); |
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| 281 | else |
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| 282 | currentParticle.SetDefinitionAndUpdateE( aPiPlus ); |
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| 283 | targetParticle.SetDefinitionAndUpdateE( aLambda ); |
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| 284 | incidentHasChanged = true; |
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| 285 | targetHasChanged = true; |
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| 286 | } |
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| 287 | } |
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| 288 | else // ran <= cnk0 |
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| 289 | { |
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| 290 | quasiElastic = true; |
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| 291 | if( targetParticle.GetDefinition() == aNeutron ) |
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| 292 | { |
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| 293 | currentParticle.SetDefinitionAndUpdateE( aKaonMinus ); |
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| 294 | targetParticle.SetDefinitionAndUpdateE( aProton ); |
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| 295 | incidentHasChanged = true; |
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| 296 | targetHasChanged = true; |
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| 297 | } |
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| 298 | } |
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| 299 | } |
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| 300 | else // (pOriginal > 2.0*GeV) || (random number >= cech[iplab]) |
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| 301 | { |
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| 302 | if( availableEnergy < aPiPlus->GetPDGMass()/MeV ) |
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| 303 | { |
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| 304 | quasiElastic = true; |
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| 305 | return; |
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| 306 | } |
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| 307 | G4double n, anpn; |
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| 308 | GetNormalizationConstant( availableEnergy, n, anpn ); |
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| 309 | G4double ran = G4UniformRand(); |
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| 310 | G4double dum, test, excs = 0.0; |
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| 311 | if( targetParticle.GetDefinition() == aProton ) |
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| 312 | { |
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| 313 | counter = -1; |
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| 314 | for( np=0; (np<numSec/3) && (ran>=excs); ++np ) |
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| 315 | { |
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| 316 | for( nm=std::max(0,np-2); nm<=np && ran>=excs; ++nm ) |
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| 317 | { |
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| 318 | for( nz=0; nz<numSec/3 && ran>=excs; ++nz ) |
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| 319 | { |
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| 320 | if( ++counter < numMul ) |
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| 321 | { |
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| 322 | nt = np+nm+nz; |
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| 323 | if( nt>0 && nt<=numSec ) |
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| 324 | { |
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| 325 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 326 | dum = (pi/anpn)*nt*protmul[counter]*protnorm[nt-1]/(2.0*n*n); |
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| 327 | if( std::fabs(dum) < 1.0 ) |
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| 328 | { |
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| 329 | if( test >= 1.0e-10 )excs += dum*test; |
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| 330 | } |
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| 331 | else |
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| 332 | excs += dum*test; |
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| 333 | } |
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| 334 | } |
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| 335 | } |
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| 336 | } |
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| 337 | } |
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| 338 | if( ran >= excs ) // 3 previous loops continued to the end |
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| 339 | { |
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| 340 | quasiElastic = true; |
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| 341 | return; |
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| 342 | } |
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| 343 | np--; nm--; nz--; |
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| 344 | switch( np-nm ) |
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| 345 | { |
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| 346 | case 1: |
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| 347 | if( G4UniformRand() < 0.5 ) |
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| 348 | { |
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| 349 | currentParticle.SetDefinitionAndUpdateE( aKaonMinus ); |
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| 350 | incidentHasChanged = true; |
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| 351 | } |
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| 352 | else |
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| 353 | { |
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| 354 | targetParticle.SetDefinitionAndUpdateE( aNeutron ); |
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| 355 | targetHasChanged = true; |
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| 356 | } |
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| 357 | case 0: |
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| 358 | break; |
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| 359 | default: |
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| 360 | currentParticle.SetDefinitionAndUpdateE( aKaonMinus ); |
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| 361 | targetParticle.SetDefinitionAndUpdateE( aNeutron ); |
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| 362 | incidentHasChanged = true; |
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| 363 | targetHasChanged = true; |
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| 364 | break; |
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| 365 | } |
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| 366 | } |
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| 367 | else // target must be a neutron |
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| 368 | { |
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| 369 | counter = -1; |
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| 370 | for( np=0; np<numSec/3 && ran>=excs; ++np ) |
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| 371 | { |
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| 372 | for( nm=std::max(0,np-1); nm<=(np+1) && ran>=excs; ++nm ) |
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| 373 | { |
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| 374 | for( nz=0; nz<numSec/3 && ran>=excs; ++nz ) |
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| 375 | { |
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| 376 | if( ++counter < numMul ) |
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| 377 | { |
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| 378 | nt = np+nm+nz; |
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| 379 | if( nt>0 && nt<=numSec ) |
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| 380 | { |
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| 381 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 382 | dum = (pi/anpn)*nt*neutmul[counter]*neutnorm[nt-1]/(2.0*n*n); |
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| 383 | if( std::fabs(dum) < 1.0 ) |
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| 384 | { |
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| 385 | if( test >= 1.0e-10 )excs += dum*test; |
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| 386 | } |
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| 387 | else |
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| 388 | excs += dum*test; |
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| 389 | } |
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| 390 | } |
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| 391 | } |
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| 392 | } |
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| 393 | } |
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| 394 | if( ran >= excs ) // 3 previous loops continued to the end |
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| 395 | { |
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| 396 | quasiElastic = true; |
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| 397 | return; |
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| 398 | } |
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| 399 | np--; nm--; nz--; |
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| 400 | switch( np-nm ) |
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| 401 | { |
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| 402 | case 0: |
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| 403 | currentParticle.SetDefinitionAndUpdateE( aKaonMinus ); |
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| 404 | targetParticle.SetDefinitionAndUpdateE( aProton ); |
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| 405 | incidentHasChanged = true; |
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| 406 | targetHasChanged = true; |
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| 407 | break; |
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| 408 | case 1: |
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| 409 | currentParticle.SetDefinitionAndUpdateE( aKaonMinus ); |
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| 410 | incidentHasChanged = true; |
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| 411 | break; |
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| 412 | default: |
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| 413 | targetParticle.SetDefinitionAndUpdateE( aProton ); |
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| 414 | targetHasChanged = true; |
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| 415 | break; |
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| 416 | } |
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| 417 | } |
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| 418 | if( G4UniformRand() >= 0.5 ) |
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| 419 | { |
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| 420 | if( currentParticle.GetDefinition() == aKaonMinus && |
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| 421 | targetParticle.GetDefinition() == aNeutron ) |
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| 422 | { |
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| 423 | ran = G4UniformRand(); |
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| 424 | if( ran < 0.68 ) |
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| 425 | { |
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| 426 | currentParticle.SetDefinitionAndUpdateE( aPiMinus ); |
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| 427 | targetParticle.SetDefinitionAndUpdateE( aLambda ); |
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| 428 | } |
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| 429 | else if( ran < 0.84 ) |
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| 430 | { |
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| 431 | currentParticle.SetDefinitionAndUpdateE( aPiMinus ); |
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| 432 | targetParticle.SetDefinitionAndUpdateE( aSigmaZero ); |
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| 433 | } |
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| 434 | else |
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| 435 | { |
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| 436 | currentParticle.SetDefinitionAndUpdateE( aPiZero ); |
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| 437 | targetParticle.SetDefinitionAndUpdateE( aSigmaMinus ); |
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| 438 | } |
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| 439 | } |
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| 440 | else if( (currentParticle.GetDefinition() == aKaonZS || |
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| 441 | currentParticle.GetDefinition() == aKaonZL ) && |
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| 442 | targetParticle.GetDefinition() == aProton ) |
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| 443 | { |
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| 444 | ran = G4UniformRand(); |
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| 445 | if( ran < 0.68 ) |
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| 446 | { |
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| 447 | currentParticle.SetDefinitionAndUpdateE( aPiPlus ); |
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| 448 | targetParticle.SetDefinitionAndUpdateE( aLambda ); |
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| 449 | } |
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| 450 | else if( ran < 0.84 ) |
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| 451 | { |
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| 452 | currentParticle.SetDefinitionAndUpdateE( aPiZero ); |
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| 453 | targetParticle.SetDefinitionAndUpdateE( aSigmaPlus ); |
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| 454 | } |
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| 455 | else |
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| 456 | { |
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| 457 | currentParticle.SetDefinitionAndUpdateE( aPiPlus ); |
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| 458 | targetParticle.SetDefinitionAndUpdateE( aSigmaZero ); |
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| 459 | } |
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| 460 | } |
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| 461 | else |
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| 462 | { |
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| 463 | ran = G4UniformRand(); |
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| 464 | if( ran < 0.67 ) |
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| 465 | { |
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| 466 | currentParticle.SetDefinitionAndUpdateE( aPiZero ); |
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| 467 | targetParticle.SetDefinitionAndUpdateE( aLambda ); |
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| 468 | } |
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| 469 | else if( ran < 0.78 ) |
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| 470 | { |
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| 471 | currentParticle.SetDefinitionAndUpdateE( aPiMinus ); |
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| 472 | targetParticle.SetDefinitionAndUpdateE( aSigmaPlus ); |
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| 473 | } |
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| 474 | else if( ran < 0.89 ) |
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| 475 | { |
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| 476 | currentParticle.SetDefinitionAndUpdateE( aPiZero ); |
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| 477 | targetParticle.SetDefinitionAndUpdateE( aSigmaZero ); |
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| 478 | } |
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| 479 | else |
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| 480 | { |
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| 481 | currentParticle.SetDefinitionAndUpdateE( aPiPlus ); |
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| 482 | targetParticle.SetDefinitionAndUpdateE( aSigmaMinus ); |
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| 483 | } |
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| 484 | } |
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| 485 | incidentHasChanged = true; |
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| 486 | targetHasChanged = true; |
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| 487 | } |
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| 488 | } |
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| 489 | if( currentParticle.GetDefinition() == aKaonZL ) |
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| 490 | { |
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| 491 | if( G4UniformRand() >= 0.5 ) |
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| 492 | { |
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| 493 | currentParticle.SetDefinitionAndUpdateE( aKaonZS ); |
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| 494 | incidentHasChanged = true; |
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| 495 | } |
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| 496 | } |
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| 497 | if( targetParticle.GetDefinition() == aKaonZL ) |
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| 498 | { |
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| 499 | if( G4UniformRand() >= 0.5 ) |
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| 500 | { |
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| 501 | targetParticle.SetDefinitionAndUpdateE( aKaonZS ); |
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| 502 | targetHasChanged = true; |
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| 503 | } |
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| 504 | } |
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| 505 | SetUpPions( np, nm, nz, vec, vecLen ); |
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| 506 | return; |
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| 507 | } |
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| 508 | |
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| 509 | /* end of file */ |
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| 510 | |
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