[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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[1347] | 26 | // $Id: G4HEAntiKaonZeroInelastic.cc,v 1.18 2010/11/27 00:06:50 dennis Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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[819] | 28 | // |
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| 29 | |
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| 30 | #include "globals.hh" |
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| 31 | #include "G4ios.hh" |
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| 32 | |
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| 33 | // G4 Process: Gheisha High Energy Collision model. |
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| 34 | // This includes the high energy cascading model, the two-body-resonance model |
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[1347] | 35 | // and the low energy two-body model. Not included is the low energy stuff like |
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[819] | 36 | // nuclear reactions, nuclear fission without any cascading and all processes for |
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| 37 | // particles at rest. |
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| 38 | // First work done by J.L.Chuma and F.W.Jones, TRIUMF, June 96. |
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| 39 | // H. Fesefeldt, RWTH-Aachen, 23-October-1996 |
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| 40 | // Last modified: 29-July-1998 |
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| 41 | |
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| 42 | #include "G4HEAntiKaonZeroInelastic.hh" |
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| 43 | |
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[1347] | 44 | G4HadFinalState* |
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| 45 | G4HEAntiKaonZeroInelastic::ApplyYourself(const G4HadProjectile& aTrack, |
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| 46 | G4Nucleus& targetNucleus) |
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| 47 | { |
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| 48 | G4HEVector* pv = new G4HEVector[MAXPART]; |
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| 49 | const G4HadProjectile* aParticle = &aTrack; |
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| 50 | const G4double atomicWeight = targetNucleus.GetN(); |
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| 51 | const G4double atomicNumber = targetNucleus.GetZ(); |
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| 52 | G4HEVector incidentParticle(aParticle); |
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[819] | 53 | |
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[1347] | 54 | G4int incidentCode = incidentParticle.getCode(); |
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| 55 | G4double incidentMass = incidentParticle.getMass(); |
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| 56 | G4double incidentTotalEnergy = incidentParticle.getEnergy(); |
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| 57 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); |
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| 58 | G4double incidentKineticEnergy = incidentTotalEnergy - incidentMass; |
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[819] | 59 | |
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[1347] | 60 | if (incidentKineticEnergy < 1.) |
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| 61 | G4cout << "GHEAntiKaonZeroInelastic: incident energy < 1 GeV" << G4endl; |
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| 62 | |
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| 63 | if (verboseLevel > 1) { |
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| 64 | G4cout << "G4HEAntiKaonZeroInelastic::ApplyYourself" << G4endl; |
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| 65 | G4cout << "incident particle " << incidentParticle.getName() |
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| 66 | << "mass " << incidentMass |
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| 67 | << "kinetic energy " << incidentKineticEnergy |
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| 68 | << G4endl; |
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| 69 | G4cout << "target material with (A,Z) = (" |
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| 70 | << atomicWeight << "," << atomicNumber << ")" << G4endl; |
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| 71 | } |
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[819] | 72 | |
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[1347] | 73 | G4double inelasticity = NuclearInelasticity(incidentKineticEnergy, |
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| 74 | atomicWeight, atomicNumber); |
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| 75 | if (verboseLevel > 1) |
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| 76 | G4cout << "nuclear inelasticity = " << inelasticity << G4endl; |
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[819] | 77 | |
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[1347] | 78 | incidentKineticEnergy -= inelasticity; |
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[819] | 79 | |
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[1347] | 80 | G4double excitationEnergyGNP = 0.; |
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| 81 | G4double excitationEnergyDTA = 0.; |
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[819] | 82 | |
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[1347] | 83 | G4double excitation = NuclearExcitation(incidentKineticEnergy, |
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| 84 | atomicWeight, atomicNumber, |
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| 85 | excitationEnergyGNP, |
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| 86 | excitationEnergyDTA); |
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| 87 | if (verboseLevel > 1) |
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| 88 | G4cout << "nuclear excitation = " << excitation << excitationEnergyGNP |
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[819] | 89 | << excitationEnergyDTA << G4endl; |
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| 90 | |
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| 91 | |
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[1347] | 92 | incidentKineticEnergy -= excitation; |
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| 93 | incidentTotalEnergy = incidentKineticEnergy + incidentMass; |
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| 94 | incidentTotalMomentum = std::sqrt( (incidentTotalEnergy-incidentMass) |
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| 95 | *(incidentTotalEnergy+incidentMass)); |
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[819] | 96 | |
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[1347] | 97 | G4HEVector targetParticle; |
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| 98 | if (G4UniformRand() < atomicNumber/atomicWeight) { |
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| 99 | targetParticle.setDefinition("Proton"); |
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| 100 | } else { |
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| 101 | targetParticle.setDefinition("Neutron"); |
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| 102 | } |
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[819] | 103 | |
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[1347] | 104 | G4double targetMass = targetParticle.getMass(); |
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| 105 | G4double centerOfMassEnergy = std::sqrt(incidentMass*incidentMass |
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| 106 | + targetMass*targetMass |
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| 107 | + 2.0*targetMass*incidentTotalEnergy); |
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| 108 | G4double availableEnergy = centerOfMassEnergy - targetMass - incidentMass; |
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[819] | 109 | |
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[1347] | 110 | vecLength = 0; |
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[819] | 111 | |
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[1347] | 112 | if (verboseLevel > 1) |
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| 113 | G4cout << "ApplyYourself: CallFirstIntInCascade for particle " |
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[819] | 114 | << incidentCode << G4endl; |
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| 115 | |
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[1347] | 116 | G4bool successful = false; |
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[819] | 117 | |
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[1347] | 118 | G4bool inElastic = true; |
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| 119 | FirstIntInCasAntiKaonZero(inElastic, availableEnergy, pv, vecLength, |
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| 120 | incidentParticle, targetParticle ); |
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[819] | 121 | |
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[1347] | 122 | if (verboseLevel > 1) |
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| 123 | G4cout << "ApplyYourself::StrangeParticlePairProduction" << G4endl; |
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[819] | 124 | |
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[1347] | 125 | if ((vecLength > 0) && (availableEnergy > 1.)) |
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| 126 | StrangeParticlePairProduction(availableEnergy, centerOfMassEnergy, |
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| 127 | pv, vecLength, |
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| 128 | incidentParticle, targetParticle); |
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| 129 | HighEnergyCascading(successful, pv, vecLength, |
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| 130 | excitationEnergyGNP, excitationEnergyDTA, |
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| 131 | incidentParticle, targetParticle, |
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| 132 | atomicWeight, atomicNumber); |
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| 133 | if (!successful) |
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| 134 | HighEnergyClusterProduction(successful, pv, vecLength, |
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| 135 | excitationEnergyGNP, excitationEnergyDTA, |
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| 136 | incidentParticle, targetParticle, |
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| 137 | atomicWeight, atomicNumber); |
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| 138 | if (!successful) |
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| 139 | MediumEnergyCascading(successful, pv, vecLength, |
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| 140 | excitationEnergyGNP, excitationEnergyDTA, |
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| 141 | incidentParticle, targetParticle, |
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| 142 | atomicWeight, atomicNumber); |
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| 143 | if (!successful) |
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| 144 | MediumEnergyClusterProduction(successful, pv, vecLength, |
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| 145 | excitationEnergyGNP, excitationEnergyDTA, |
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| 146 | incidentParticle, targetParticle, |
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| 147 | atomicWeight, atomicNumber); |
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| 148 | if (!successful) |
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| 149 | QuasiElasticScattering(successful, pv, vecLength, |
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| 150 | excitationEnergyGNP, excitationEnergyDTA, |
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| 151 | incidentParticle, targetParticle, |
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| 152 | atomicWeight, atomicNumber); |
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| 153 | if (!successful) |
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| 154 | ElasticScattering(successful, pv, vecLength, |
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| 155 | incidentParticle, |
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| 156 | atomicWeight, atomicNumber); |
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[819] | 157 | |
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[1347] | 158 | if (!successful) |
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| 159 | G4cout << "GHEInelasticInteraction::ApplyYourself fails to produce final state particles" |
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| 160 | << G4endl; |
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[819] | 161 | |
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[1347] | 162 | FillParticleChange(pv, vecLength); |
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| 163 | delete [] pv; |
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| 164 | theParticleChange.SetStatusChange(stopAndKill); |
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| 165 | return &theParticleChange; |
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| 166 | } |
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[1315] | 167 | |
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[819] | 168 | |
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| 169 | void |
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[1347] | 170 | G4HEAntiKaonZeroInelastic::FirstIntInCasAntiKaonZero(G4bool& inElastic, |
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| 171 | const G4double availableEnergy, |
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| 172 | G4HEVector pv[], |
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| 173 | G4int &vecLen, |
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| 174 | const G4HEVector& incidentParticle, |
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| 175 | const G4HEVector& targetParticle) |
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[819] | 176 | |
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[1347] | 177 | // AntiKaon0 undergoes interaction with nucleon within a nucleus. Check if it |
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| 178 | // is energetically possible to produce pions/kaons. In not, assume nuclear |
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| 179 | // excitation occurs and input particle is degraded in energy. No other |
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| 180 | // particles are produced. |
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[819] | 181 | // If reaction is possible, find the correct number of pions/protons/neutrons |
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| 182 | // produced using an interpolation to multiplicity data. Replace some pions or |
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| 183 | // protons/neutrons by kaons or strange baryons according to the average |
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| 184 | // multiplicity per inelastic reaction. |
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[1347] | 185 | { |
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| 186 | static const G4double expxu = std::log(MAXFLOAT); // upper bound for arg. of exp |
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| 187 | static const G4double expxl = -expxu; // lower bound for arg. of exp |
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[819] | 188 | |
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[1347] | 189 | static const G4double protb = 0.7; |
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| 190 | static const G4double neutb = 0.7; |
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| 191 | static const G4double c = 1.25; |
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[819] | 192 | |
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[1347] | 193 | static const G4int numMul = 1200; |
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| 194 | static const G4int numSec = 60; |
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[819] | 195 | |
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[1347] | 196 | G4int neutronCode = Neutron.getCode(); |
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| 197 | G4int protonCode = Proton.getCode(); |
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| 198 | G4int kaonMinusCode = KaonMinus.getCode(); |
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| 199 | G4int kaonZeroCode = KaonZero.getCode(); |
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| 200 | G4int antiKaonZeroCode = AntiKaonZero.getCode(); |
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[819] | 201 | |
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[1347] | 202 | G4int targetCode = targetParticle.getCode(); |
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| 203 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); |
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[819] | 204 | |
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[1347] | 205 | static G4bool first = true; |
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| 206 | static G4double protmul[numMul], protnorm[numSec]; // proton constants |
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| 207 | static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants |
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[819] | 208 | |
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[1347] | 209 | // misc. local variables |
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| 210 | // np = number of pi+, nm = number of pi-, nz = number of pi0 |
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[819] | 211 | |
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[1347] | 212 | G4int i, counter, nt, np, nm, nz; |
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[819] | 213 | |
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| 214 | if( first ) |
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[1347] | 215 | { // compute normalization constants, this will only be done once |
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[819] | 216 | first = false; |
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| 217 | for( i=0; i<numMul; i++ )protmul[i] = 0.0; |
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| 218 | for( i=0; i<numSec; i++ )protnorm[i] = 0.0; |
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| 219 | counter = -1; |
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| 220 | for( np=0; np<(numSec/3); np++ ) |
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| 221 | { |
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| 222 | for( nm=std::max(0,np-2); nm<=np; nm++ ) |
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| 223 | { |
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| 224 | for( nz=0; nz<numSec/3; nz++ ) |
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| 225 | { |
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| 226 | if( ++counter < numMul ) |
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| 227 | { |
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| 228 | nt = np+nm+nz; |
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| 229 | if( (nt>0) && (nt<=numSec) ) |
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| 230 | { |
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| 231 | protmul[counter] = |
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| 232 | pmltpc(np,nm,nz,nt,protb,c) ; |
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| 233 | protnorm[nt-1] += protmul[counter]; |
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| 234 | } |
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| 235 | } |
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| 236 | } |
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| 237 | } |
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| 238 | } |
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| 239 | for( i=0; i<numMul; i++ )neutmul[i] = 0.0; |
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| 240 | for( i=0; i<numSec; i++ )neutnorm[i] = 0.0; |
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| 241 | counter = -1; |
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| 242 | for( np=0; np<numSec/3; np++ ) |
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| 243 | { |
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| 244 | for( nm=std::max(0,np-1); nm<=(np+1); nm++ ) |
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| 245 | { |
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| 246 | for( nz=0; nz<numSec/3; nz++ ) |
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| 247 | { |
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| 248 | if( ++counter < numMul ) |
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| 249 | { |
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| 250 | nt = np+nm+nz; |
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| 251 | if( (nt>0) && (nt<=numSec) ) |
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| 252 | { |
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| 253 | neutmul[counter] = |
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| 254 | pmltpc(np,nm,nz,nt,neutb,c); |
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| 255 | neutnorm[nt-1] += neutmul[counter]; |
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| 256 | } |
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| 257 | } |
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| 258 | } |
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| 259 | } |
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| 260 | } |
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| 261 | for( i=0; i<numSec; i++ ) |
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| 262 | { |
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| 263 | if( protnorm[i] > 0.0 )protnorm[i] = 1.0/protnorm[i]; |
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| 264 | if( neutnorm[i] > 0.0 )neutnorm[i] = 1.0/neutnorm[i]; |
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| 265 | } |
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| 266 | } // end of initialization |
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| 267 | |
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| 268 | |
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| 269 | // initialize the first two places |
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| 270 | // the same as beam and target |
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| 271 | pv[0] = incidentParticle; |
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| 272 | pv[1] = targetParticle; |
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| 273 | vecLen = 2; |
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| 274 | |
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| 275 | if (!inElastic || (availableEnergy <= PionPlus.getMass())) |
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| 276 | return; |
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| 277 | |
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| 278 | |
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| 279 | // inelastic scattering |
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| 280 | |
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| 281 | np = 0, nm = 0, nz = 0; |
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| 282 | G4double cech[] = { 1., 1., 1., 0.70, 0.60, 0.55, 0.35, 0.25, 0.18, 0.15}; |
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| 283 | G4int iplab = G4int( incidentTotalMomentum*5.); |
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| 284 | if( (iplab < 10) && (G4UniformRand() < cech[iplab]) ) |
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| 285 | { |
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| 286 | G4int iplab = std::min(19, G4int( incidentTotalMomentum*5.)); |
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| 287 | 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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| 288 | 0.58, 0.55, 0.36, 0.29, 0.29, 0.32, 0.32, 0.33, 0.33, 0.33}; |
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| 289 | if( G4UniformRand() < cnk0[iplab] ) |
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| 290 | { |
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| 291 | if( targetCode == protonCode ) |
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| 292 | { |
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| 293 | return; |
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| 294 | } |
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| 295 | else |
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| 296 | { |
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| 297 | pv[0] = KaonMinus; |
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| 298 | pv[1] = Proton; |
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| 299 | return; |
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| 300 | } |
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| 301 | } |
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| 302 | G4double ran = G4UniformRand(); |
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| 303 | if( targetCode == protonCode ) // target is a proton |
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| 304 | { |
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| 305 | if( ran < 0.25 ) |
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| 306 | { |
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| 307 | } |
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| 308 | else if (ran < 0.50) |
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| 309 | { |
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| 310 | pv[0] = PionPlus; |
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| 311 | pv[1] = SigmaZero; |
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| 312 | } |
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| 313 | else if (ran < 0.75) |
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| 314 | { |
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| 315 | } |
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| 316 | else |
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| 317 | { |
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| 318 | pv[0] = PionPlus; |
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| 319 | pv[1] = Lambda; |
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| 320 | } |
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| 321 | } |
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| 322 | else |
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| 323 | { // target is a neutron |
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| 324 | if( ran < 0.25 ) |
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| 325 | { |
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| 326 | pv[0] = PionMinus; |
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| 327 | pv[1] = SigmaPlus; |
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| 328 | } |
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| 329 | else if (ran < 0.50) |
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| 330 | { |
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| 331 | pv[0] = PionZero; |
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| 332 | pv[1] = SigmaZero; |
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| 333 | } |
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| 334 | else if (ran < 0.75) |
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| 335 | { |
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| 336 | pv[0] = PionPlus; |
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| 337 | pv[1] = SigmaMinus; |
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| 338 | } |
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| 339 | else |
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| 340 | { |
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| 341 | pv[0] = PionZero; |
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| 342 | pv[1] = Lambda; |
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| 343 | } |
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| 344 | } |
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| 345 | return; |
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| 346 | } |
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| 347 | else |
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| 348 | { |
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| 349 | // number of total particles vs. centre of mass Energy - 2*proton mass |
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| 350 | |
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| 351 | G4double aleab = std::log(availableEnergy); |
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| 352 | G4double n = 3.62567+aleab*(0.665843+aleab*(0.336514 |
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| 353 | + aleab*(0.117712+0.0136912*aleab))) - 2.0; |
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| 354 | |
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| 355 | // normalization constant for kno-distribution. |
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| 356 | // calculate first the sum of all constants, check for numerical problems. |
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| 357 | G4double test, dum, anpn = 0.0; |
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| 358 | |
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| 359 | for (nt=1; nt<=numSec; nt++) { |
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| 360 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 361 | dum = pi*nt/(2.0*n*n); |
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| 362 | if (std::fabs(dum) < 1.0) { |
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| 363 | if( test >= 1.0e-10 )anpn += dum*test; |
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| 364 | } else { |
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| 365 | anpn += dum*test; |
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| 366 | } |
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| 367 | } |
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| 368 | |
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| 369 | G4double ran = G4UniformRand(); |
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| 370 | G4double excs = 0.0; |
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| 371 | if (targetCode == protonCode) { |
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| 372 | counter = -1; |
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| 373 | for (np=0; np<numSec/3; np++) { |
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| 374 | for (nm=std::max(0,np-2); nm<=np; nm++) { |
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| 375 | for (nz=0; nz<numSec/3; nz++) { |
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| 376 | if (++counter < numMul) { |
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| 377 | nt = np+nm+nz; |
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| 378 | if( (nt>0) && (nt<=numSec) ) { |
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| 379 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 380 | dum = (pi/anpn)*nt*protmul[counter]*protnorm[nt-1]/(2.0*n*n); |
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| 381 | |
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| 382 | if (std::fabs(dum) < 1.0) { |
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| 383 | if( test >= 1.0e-10 )excs += dum*test; |
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| 384 | } else { |
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| 385 | excs += dum*test; |
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| 386 | } |
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| 387 | |
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| 388 | if (ran < excs) goto outOfLoop; //-----------------------> |
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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 | // 3 previous loops continued to the end |
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| 395 | inElastic = false; // quasi-elastic scattering |
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| 396 | return; |
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| 397 | |
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| 398 | } else { // target must be a neutron |
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| 399 | counter = -1; |
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| 400 | for (np=0; np<numSec/3; np++) { |
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| 401 | for (nm=std::max(0,np-1); nm<=(np+1); nm++) { |
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| 402 | for (nz=0; nz<numSec/3; nz++) { |
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| 403 | if (++counter < numMul) { |
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| 404 | nt = np+nm+nz; |
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| 405 | if( (nt>=1) && (nt<=numSec) ) { |
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| 406 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 407 | dum = (pi/anpn)*nt*neutmul[counter]*neutnorm[nt-1]/(2.0*n*n); |
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| 408 | |
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| 409 | if (std::fabs(dum) < 1.0) { |
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| 410 | if( test >= 1.0e-10 )excs += dum*test; |
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| 411 | } else { |
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| 412 | excs += dum*test; |
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| 413 | } |
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| 414 | |
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| 415 | if (ran < excs) goto outOfLoop; // --------------------------> |
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| 416 | } |
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| 417 | } |
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| 418 | } |
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| 419 | } |
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| 420 | } |
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| 421 | // 3 previous loops continued to the end |
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| 422 | inElastic = false; // quasi-elastic scattering. |
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| 423 | return; |
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| 424 | } |
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| 425 | } |
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| 426 | outOfLoop: // <------------------------------------------------------------------------ |
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| 427 | |
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| 428 | if( targetCode == protonCode) |
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| 429 | { |
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| 430 | if( np == nm) |
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| 431 | { |
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| 432 | } |
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| 433 | else if (np == (1+nm)) |
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| 434 | { |
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| 435 | if( G4UniformRand() < 0.5) |
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| 436 | { |
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| 437 | pv[0] = KaonMinus; |
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| 438 | } |
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| 439 | else |
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| 440 | { |
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| 441 | pv[1] = Neutron; |
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| 442 | } |
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| 443 | } |
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| 444 | else |
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| 445 | { |
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| 446 | pv[0] = KaonMinus; |
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| 447 | pv[1] = Neutron; |
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| 448 | } |
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| 449 | } |
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| 450 | else |
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| 451 | { |
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| 452 | if( np == nm) |
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| 453 | { |
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| 454 | if( G4UniformRand() < 0.75) |
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| 455 | { |
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| 456 | } |
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| 457 | else |
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| 458 | { |
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| 459 | pv[0] = KaonMinus; |
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| 460 | pv[1] = Proton; |
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| 461 | } |
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| 462 | } |
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| 463 | else if ( np == (1+nm)) |
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| 464 | { |
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| 465 | pv[0] = KaonMinus; |
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| 466 | } |
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| 467 | else |
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| 468 | { |
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| 469 | pv[1] = Proton; |
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| 470 | } |
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| 471 | } |
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| 472 | |
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| 473 | |
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| 474 | if( G4UniformRand() < 0.5 ) |
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| 475 | { |
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| 476 | if( ( (pv[0].getCode() == kaonMinusCode) |
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| 477 | && (pv[1].getCode() == neutronCode) ) |
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| 478 | || ( (pv[0].getCode() == kaonZeroCode) |
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| 479 | && (pv[1].getCode() == protonCode) ) |
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| 480 | || ( (pv[0].getCode() == antiKaonZeroCode) |
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| 481 | && (pv[1].getCode() == protonCode) ) ) |
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| 482 | { |
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| 483 | G4double ran = G4UniformRand(); |
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| 484 | if( pv[1].getCode() == protonCode) |
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| 485 | { |
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| 486 | if(ran < 0.68) |
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| 487 | { |
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| 488 | pv[0] = PionPlus; |
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| 489 | pv[1] = Lambda; |
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| 490 | } |
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| 491 | else if (ran < 0.84) |
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| 492 | { |
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| 493 | pv[0] = PionZero; |
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| 494 | pv[1] = SigmaPlus; |
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| 495 | } |
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| 496 | else |
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| 497 | { |
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| 498 | pv[0] = PionPlus; |
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| 499 | pv[1] = SigmaZero; |
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| 500 | } |
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| 501 | } |
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| 502 | else |
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| 503 | { |
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| 504 | if(ran < 0.68) |
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| 505 | { |
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| 506 | pv[0] = PionMinus; |
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| 507 | pv[1] = Lambda; |
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| 508 | } |
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| 509 | else if (ran < 0.84) |
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| 510 | { |
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| 511 | pv[0] = PionMinus; |
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| 512 | pv[1] = SigmaZero; |
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| 513 | } |
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| 514 | else |
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| 515 | { |
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| 516 | pv[0] = PionZero; |
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| 517 | pv[1] = SigmaMinus; |
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| 518 | } |
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| 519 | } |
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| 520 | } |
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| 521 | else |
---|
| 522 | { |
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| 523 | G4double ran = G4UniformRand(); |
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| 524 | if (ran < 0.67) |
---|
| 525 | { |
---|
| 526 | pv[0] = PionZero; |
---|
| 527 | pv[1] = Lambda; |
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| 528 | } |
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| 529 | else if (ran < 0.78) |
---|
| 530 | { |
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| 531 | pv[0] = PionMinus; |
---|
| 532 | pv[1] = SigmaPlus; |
---|
| 533 | } |
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| 534 | else if (ran < 0.89) |
---|
| 535 | { |
---|
| 536 | pv[0] = PionZero; |
---|
| 537 | pv[1] = SigmaZero; |
---|
| 538 | } |
---|
| 539 | else |
---|
| 540 | { |
---|
| 541 | pv[0] = PionPlus; |
---|
| 542 | pv[1] = SigmaMinus; |
---|
| 543 | } |
---|
| 544 | } |
---|
| 545 | } |
---|
| 546 | |
---|
| 547 | |
---|
| 548 | nt = np + nm + nz; |
---|
| 549 | while ( nt > 0) |
---|
| 550 | { |
---|
| 551 | G4double ran = G4UniformRand(); |
---|
| 552 | if ( ran < (G4double)np/nt) |
---|
| 553 | { |
---|
| 554 | if( np > 0 ) |
---|
| 555 | { pv[vecLen++] = PionPlus; |
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| 556 | np--; |
---|
| 557 | } |
---|
| 558 | } |
---|
| 559 | else if ( ran < (G4double)(np+nm)/nt) |
---|
| 560 | { |
---|
| 561 | if( nm > 0 ) |
---|
| 562 | { |
---|
| 563 | pv[vecLen++] = PionMinus; |
---|
| 564 | nm--; |
---|
| 565 | } |
---|
| 566 | } |
---|
| 567 | else |
---|
| 568 | { |
---|
| 569 | if( nz > 0 ) |
---|
| 570 | { |
---|
| 571 | pv[vecLen++] = PionZero; |
---|
| 572 | nz--; |
---|
| 573 | } |
---|
| 574 | } |
---|
| 575 | nt = np + nm + nz; |
---|
| 576 | } |
---|
| 577 | if (verboseLevel > 1) |
---|
| 578 | { |
---|
| 579 | G4cout << "Particles produced: " ; |
---|
| 580 | G4cout << pv[0].getName() << " " ; |
---|
| 581 | G4cout << pv[1].getName() << " " ; |
---|
| 582 | for (i=2; i < vecLen; i++) |
---|
| 583 | { |
---|
| 584 | G4cout << pv[i].getName() << " " ; |
---|
| 585 | } |
---|
| 586 | G4cout << G4endl; |
---|
| 587 | } |
---|
| 588 | return; |
---|
| 589 | } |
---|
| 590 | |
---|
| 591 | |
---|
| 592 | |
---|
| 593 | |
---|
| 594 | |
---|
| 595 | |
---|
| 596 | |
---|