[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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[962] | 27 | // $Id: G4HEKaonMinusInelastic.cc,v 1.14 2008/03/17 20:49:17 dennis Exp $ |
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[1007] | 28 | // GEANT4 tag $Name: geant4-09-02 $ |
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[819] | 29 | // |
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| 30 | // |
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| 31 | |
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| 32 | #include "globals.hh" |
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| 33 | #include "G4ios.hh" |
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| 34 | |
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| 35 | // |
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| 36 | // G4 Process: Gheisha High Energy Collision model. |
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| 37 | // This includes the high energy cascading model, the two-body-resonance model |
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| 38 | // and the low energy two-body model. Not included are the low energy stuff |
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| 39 | // like nuclear reactions, nuclear fission without any cascading and all |
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| 40 | // processes for particles at rest. |
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| 41 | // First work done by J.L.Chuma and F.W.Jones, TRIUMF, June 96. |
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| 42 | // H. Fesefeldt, RWTH-Aachen, 23-October-1996 |
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| 43 | // Last modified: 29-July-1998 |
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| 44 | |
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| 45 | #include "G4HEKaonMinusInelastic.hh" |
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| 46 | |
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| 47 | G4HadFinalState * G4HEKaonMinusInelastic:: |
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| 48 | ApplyYourself( const G4HadProjectile &aTrack, G4Nucleus &targetNucleus ) |
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| 49 | { |
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| 50 | G4HEVector * pv = new G4HEVector[MAXPART]; |
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| 51 | const G4HadProjectile *aParticle = &aTrack; |
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| 52 | // G4DynamicParticle *originalTarget = targetNucleus.ReturnTargetParticle(); |
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| 53 | const G4double A = targetNucleus.GetN(); |
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| 54 | const G4double Z = targetNucleus.GetZ(); |
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| 55 | G4HEVector incidentParticle(aParticle); |
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| 56 | |
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| 57 | G4double atomicNumber = Z; |
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| 58 | G4double atomicWeight = A; |
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| 59 | |
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| 60 | G4int incidentCode = incidentParticle.getCode(); |
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| 61 | G4double incidentMass = incidentParticle.getMass(); |
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| 62 | G4double incidentTotalEnergy = incidentParticle.getEnergy(); |
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| 63 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); |
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| 64 | G4double incidentKineticEnergy = incidentTotalEnergy - incidentMass; |
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| 65 | |
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| 66 | if(incidentKineticEnergy < 1.) |
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| 67 | { |
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| 68 | G4cout << "GHEKaonMinusInelastic: incident energy < 1 GeV" << G4endl; |
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| 69 | } |
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| 70 | if(verboseLevel > 1) |
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| 71 | { |
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| 72 | G4cout << "G4HEKaonMinusInelastic::ApplyYourself" << G4endl; |
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| 73 | G4cout << "incident particle " << incidentParticle.getName() |
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| 74 | << "mass " << incidentMass |
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| 75 | << "kinetic energy " << incidentKineticEnergy |
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| 76 | << G4endl; |
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| 77 | G4cout << "target material with (A,Z) = (" |
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| 78 | << atomicWeight << "," << atomicNumber << ")" << G4endl; |
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| 79 | } |
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| 80 | |
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| 81 | G4double inelasticity = NuclearInelasticity(incidentKineticEnergy, |
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| 82 | atomicWeight, atomicNumber); |
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| 83 | if(verboseLevel > 1) |
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| 84 | G4cout << "nuclear inelasticity = " << inelasticity << G4endl; |
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| 85 | |
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| 86 | incidentKineticEnergy -= inelasticity; |
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| 87 | |
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| 88 | G4double excitationEnergyGNP = 0.; |
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| 89 | G4double excitationEnergyDTA = 0.; |
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| 90 | |
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| 91 | G4double excitation = NuclearExcitation(incidentKineticEnergy, |
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| 92 | atomicWeight, atomicNumber, |
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| 93 | excitationEnergyGNP, |
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| 94 | excitationEnergyDTA); |
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| 95 | if(verboseLevel > 1) |
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| 96 | G4cout << "nuclear excitation = " << excitation << excitationEnergyGNP |
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| 97 | << excitationEnergyDTA << G4endl; |
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| 98 | |
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| 99 | |
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| 100 | incidentKineticEnergy -= excitation; |
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| 101 | incidentTotalEnergy = incidentKineticEnergy + incidentMass; |
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| 102 | incidentTotalMomentum = std::sqrt( (incidentTotalEnergy-incidentMass) |
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| 103 | *(incidentTotalEnergy+incidentMass)); |
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| 104 | |
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| 105 | |
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| 106 | G4HEVector targetParticle; |
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| 107 | if(G4UniformRand() < atomicNumber/atomicWeight) |
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| 108 | { |
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| 109 | targetParticle.setDefinition("Proton"); |
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| 110 | } |
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| 111 | else |
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| 112 | { |
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| 113 | targetParticle.setDefinition("Neutron"); |
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| 114 | } |
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| 115 | |
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| 116 | G4double targetMass = targetParticle.getMass(); |
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| 117 | G4double centerOfMassEnergy = std::sqrt( incidentMass*incidentMass + targetMass*targetMass |
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| 118 | + 2.0*targetMass*incidentTotalEnergy); |
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| 119 | G4double availableEnergy = centerOfMassEnergy - targetMass - incidentMass; |
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| 120 | |
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| 121 | // this was the meaning of inElastic in the |
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| 122 | // original Gheisha stand-alone version. |
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| 123 | // G4bool inElastic = InElasticCrossSectionInFirstInt |
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| 124 | // (availableEnergy, incidentCode, incidentTotalMomentum); |
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| 125 | // by unknown reasons, it has been replaced |
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| 126 | // to the following code in Geant??? |
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| 127 | G4bool inElastic = true; |
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| 128 | // if (G4UniformRand() < elasticCrossSection/totalCrossSection) inElastic = false; |
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| 129 | |
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| 130 | |
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| 131 | vecLength = 0; |
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| 132 | |
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| 133 | if(verboseLevel > 1) |
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| 134 | G4cout << "ApplyYourself: CallFirstIntInCascade for particle " |
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| 135 | << incidentCode << G4endl; |
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| 136 | |
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| 137 | G4bool successful = false; |
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| 138 | |
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| 139 | if(inElastic || (!inElastic && atomicWeight < 1.5)) |
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| 140 | { |
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| 141 | FirstIntInCasKaonMinus(inElastic, availableEnergy, pv, vecLength, |
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| 142 | incidentParticle, targetParticle); |
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| 143 | |
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| 144 | if(verboseLevel > 1) |
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| 145 | G4cout << "ApplyYourself::StrangeParticlePairProduction" << G4endl; |
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| 146 | |
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| 147 | |
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| 148 | if ((vecLength > 0) && (availableEnergy > 1.)) |
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| 149 | StrangeParticlePairProduction( availableEnergy, centerOfMassEnergy, |
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| 150 | pv, vecLength, |
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| 151 | incidentParticle, targetParticle); |
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| 152 | HighEnergyCascading( successful, pv, vecLength, |
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| 153 | excitationEnergyGNP, excitationEnergyDTA, |
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| 154 | incidentParticle, targetParticle, |
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| 155 | atomicWeight, atomicNumber); |
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| 156 | if (!successful) |
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| 157 | HighEnergyClusterProduction( successful, pv, vecLength, |
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| 158 | excitationEnergyGNP, excitationEnergyDTA, |
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| 159 | incidentParticle, targetParticle, |
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| 160 | atomicWeight, atomicNumber); |
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| 161 | if (!successful) |
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| 162 | MediumEnergyCascading( successful, pv, vecLength, |
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| 163 | excitationEnergyGNP, excitationEnergyDTA, |
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| 164 | incidentParticle, targetParticle, |
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| 165 | atomicWeight, atomicNumber); |
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| 166 | |
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| 167 | if (!successful) |
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| 168 | MediumEnergyClusterProduction( successful, pv, vecLength, |
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| 169 | excitationEnergyGNP, excitationEnergyDTA, |
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| 170 | incidentParticle, targetParticle, |
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| 171 | atomicWeight, atomicNumber); |
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| 172 | if (!successful) |
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| 173 | QuasiElasticScattering( successful, pv, vecLength, |
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| 174 | excitationEnergyGNP, excitationEnergyDTA, |
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| 175 | incidentParticle, targetParticle, |
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| 176 | atomicWeight, atomicNumber); |
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| 177 | } |
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| 178 | if (!successful) |
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| 179 | { |
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| 180 | ElasticScattering( successful, pv, vecLength, |
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| 181 | incidentParticle, |
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| 182 | atomicWeight, atomicNumber); |
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| 183 | } |
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| 184 | |
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| 185 | if (!successful) |
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| 186 | { |
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| 187 | G4cout << "GHEInelasticInteraction::ApplyYourself fails to produce final state particles" << G4endl; |
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| 188 | } |
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| 189 | FillParticleChange(pv, vecLength); |
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| 190 | delete [] pv; |
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| 191 | theParticleChange.SetStatusChange(stopAndKill); |
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| 192 | return & theParticleChange; |
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| 193 | } |
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| 194 | |
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| 195 | void |
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| 196 | G4HEKaonMinusInelastic::FirstIntInCasKaonMinus( G4bool &inElastic, |
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| 197 | const G4double availableEnergy, |
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| 198 | G4HEVector pv[], |
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| 199 | G4int &vecLen, |
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| 200 | G4HEVector incidentParticle, |
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| 201 | G4HEVector targetParticle) |
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| 202 | |
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| 203 | // Kaon- undergoes interaction with nucleon within a nucleus. Check if it is |
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| 204 | // energetically possible to produce pions/kaons. In not, assume nuclear excitation |
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| 205 | // occurs and input particle is degraded in energy. No other particles are produced. |
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| 206 | // If reaction is possible, find the correct number of pions/protons/neutrons |
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| 207 | // produced using an interpolation to multiplicity data. Replace some pions or |
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| 208 | // protons/neutrons by kaons or strange baryons according to the average |
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| 209 | // multiplicity per inelastic reaction. |
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| 210 | |
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| 211 | { |
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| 212 | static const G4double expxu = std::log(MAXFLOAT); // upper bound for arg. of exp |
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| 213 | static const G4double expxl = -expxu; // lower bound for arg. of exp |
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| 214 | |
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| 215 | static const G4double protb = 0.7; |
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| 216 | static const G4double neutb = 0.7; |
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| 217 | static const G4double c = 1.25; |
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| 218 | |
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| 219 | static const G4int numMul = 1200; |
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| 220 | static const G4int numSec = 60; |
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| 221 | |
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| 222 | G4int neutronCode = Neutron.getCode(); |
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| 223 | G4int protonCode = Proton.getCode(); |
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| 224 | G4int kaonMinusCode = KaonMinus.getCode(); |
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| 225 | G4int kaonZeroCode = KaonZero.getCode(); |
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| 226 | G4int antiKaonZeroCode = AntiKaonZero.getCode(); |
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| 227 | |
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| 228 | G4int targetCode = targetParticle.getCode(); |
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| 229 | // G4double incidentMass = incidentParticle.getMass(); |
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| 230 | // G4double incidentEnergy = incidentParticle.getEnergy(); |
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| 231 | G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); |
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| 232 | |
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| 233 | static G4bool first = true; |
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| 234 | static G4double protmul[numMul], protnorm[numSec]; // proton constants |
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| 235 | static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants |
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| 236 | |
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| 237 | // misc. local variables |
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| 238 | // np = number of pi+, nm = number of pi-, nz = number of pi0 |
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| 239 | |
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| 240 | G4int i, counter, nt, np, nm, nz; |
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| 241 | |
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| 242 | if( first ) |
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| 243 | { // compute normalization constants, this will only be done once |
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| 244 | first = false; |
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| 245 | for( i=0; i<numMul; i++ )protmul[i] = 0.0; |
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| 246 | for( i=0; i<numSec; i++ )protnorm[i] = 0.0; |
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| 247 | counter = -1; |
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| 248 | for( np=0; np<(numSec/3); np++ ) |
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| 249 | { |
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| 250 | for( nm=Imax(0,np-1); nm<=np+1; nm++ ) |
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| 251 | { |
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| 252 | for( nz=0; nz<numSec/3; nz++ ) |
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| 253 | { |
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| 254 | if( ++counter < numMul ) |
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| 255 | { |
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| 256 | nt = np+nm+nz; |
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| 257 | if( (nt>0) && (nt<=numSec) ) |
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| 258 | { |
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| 259 | protmul[counter] = |
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| 260 | pmltpc(np,nm,nz,nt,protb,c) ; |
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| 261 | protnorm[nt-1] += protmul[counter]; |
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| 262 | } |
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| 263 | } |
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| 264 | } |
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| 265 | } |
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| 266 | } |
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| 267 | for( i=0; i<numMul; i++ )neutmul[i] = 0.0; |
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| 268 | for( i=0; i<numSec; i++ )neutnorm[i] = 0.0; |
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| 269 | counter = -1; |
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| 270 | for( np=0; np<numSec/3; np++ ) |
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| 271 | { |
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| 272 | for( nm=np; nm<=(np+2); nm++ ) |
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| 273 | { |
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| 274 | for( nz=0; nz<numSec/3; nz++ ) |
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| 275 | { |
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| 276 | if( ++counter < numMul ) |
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| 277 | { |
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| 278 | nt = np+nm+nz; |
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| 279 | if( (nt>0) && (nt<=numSec) ) |
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| 280 | { |
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| 281 | neutmul[counter] = |
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| 282 | pmltpc(np,nm,nz,nt,neutb,c); |
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| 283 | neutnorm[nt-1] += neutmul[counter]; |
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| 284 | } |
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| 285 | } |
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| 286 | } |
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| 287 | } |
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| 288 | } |
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| 289 | for( i=0; i<numSec; i++ ) |
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| 290 | { |
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| 291 | if( protnorm[i] > 0.0 )protnorm[i] = 1.0/protnorm[i]; |
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| 292 | if( neutnorm[i] > 0.0 )neutnorm[i] = 1.0/neutnorm[i]; |
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| 293 | } |
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| 294 | } // end of initialization |
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| 295 | |
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| 296 | |
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| 297 | // initialize the first two places |
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| 298 | // the same as beam and target |
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| 299 | pv[0] = incidentParticle; |
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| 300 | pv[1] = targetParticle; |
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| 301 | vecLen = 2; |
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| 302 | |
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| 303 | if (!inElastic || (availableEnergy <= PionPlus.getMass())) |
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| 304 | return; |
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| 305 | |
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| 306 | |
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| 307 | // inelastic scattering |
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| 308 | |
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| 309 | np = 0, nm = 0, nz = 0; |
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| 310 | G4double cech[] = { 1., 1., 1., 0.70, 0.60, 0.55, 0.35, 0.25, 0.18, 0.15}; |
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| 311 | G4int iplab = G4int( incidentTotalMomentum*5.); |
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| 312 | if( (iplab < 10) && (G4UniformRand() < cech[iplab])) |
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| 313 | { |
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| 314 | G4int iplab = Imin(19, G4int( incidentTotalMomentum*5.)); |
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| 315 | 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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| 316 | 0.58, 0.55, 0.36, 0.29, 0.29, 0.32, 0.32, 0.33, 0.33, 0.33}; |
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| 317 | if( G4UniformRand() < cnk0[iplab] ) |
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| 318 | { |
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| 319 | if( targetCode == protonCode ) |
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| 320 | { |
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| 321 | pv[0] = AntiKaonZero; |
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| 322 | pv[1] = Neutron; |
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| 323 | return; |
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| 324 | } |
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| 325 | else |
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| 326 | { |
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| 327 | return; |
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| 328 | } |
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| 329 | } |
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| 330 | G4double ran = G4UniformRand(); |
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| 331 | if( targetCode == protonCode ) // target is a proton |
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| 332 | { |
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| 333 | if( ran < 0.25 ) |
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| 334 | { |
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| 335 | pv[0] = PionMinus; |
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| 336 | pv[1] = SigmaPlus; |
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| 337 | } |
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| 338 | else if (ran < 0.50) |
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| 339 | { |
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| 340 | pv[0] = PionZero; |
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| 341 | pv[1] = SigmaZero; |
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| 342 | } |
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| 343 | else if (ran < 0.75) |
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| 344 | { |
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| 345 | pv[0] = PionPlus; |
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| 346 | pv[1] = SigmaMinus; |
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| 347 | } |
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| 348 | else |
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| 349 | { |
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| 350 | pv[0] = PionZero; |
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| 351 | pv[1] = Lambda; |
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| 352 | } |
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| 353 | } |
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| 354 | else |
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| 355 | { // target is a neutron |
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| 356 | if( ran < 0.25 ) |
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| 357 | { |
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| 358 | } |
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| 359 | else if (ran < 0.50) |
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| 360 | { |
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| 361 | pv[0] = PionMinus; |
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| 362 | pv[1] = SigmaZero; |
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| 363 | } |
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| 364 | else if (ran < 0.75) |
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| 365 | { |
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| 366 | pv[0] = PionZero; |
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| 367 | pv[1] = SigmaMinus; |
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| 368 | } |
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| 369 | else |
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| 370 | { |
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| 371 | pv[0] = PionMinus; |
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| 372 | pv[1] = Lambda; |
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| 373 | } |
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| 374 | } |
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| 375 | return; |
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| 376 | } |
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| 377 | else |
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| 378 | { |
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| 379 | // number of total particles vs. centre of mass Energy - 2*proton mass |
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| 380 | |
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| 381 | G4double aleab = std::log(availableEnergy); |
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| 382 | G4double n = 3.62567+aleab*(0.665843+aleab*(0.336514 |
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| 383 | + aleab*(0.117712+0.0136912*aleab))) - 2.0; |
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| 384 | |
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| 385 | // normalization constant for kno-distribution. |
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| 386 | // calculate first the sum of all constants, check for numerical problems. |
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| 387 | G4double test, dum, anpn = 0.0; |
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| 388 | |
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| 389 | for (nt=1; nt<=numSec; nt++) { |
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| 390 | test = std::exp( Amin( expxu, Amax( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 391 | dum = pi*nt/(2.0*n*n); |
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| 392 | if (std::fabs(dum) < 1.0) { |
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| 393 | if( test >= 1.0e-10 )anpn += dum*test; |
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| 394 | } else { |
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| 395 | anpn += dum*test; |
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| 396 | } |
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| 397 | } |
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| 398 | |
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| 399 | G4double ran = G4UniformRand(); |
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| 400 | G4double excs = 0.0; |
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| 401 | if( targetCode == protonCode ) |
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| 402 | { |
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| 403 | counter = -1; |
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| 404 | for( np=0; np<numSec/3; np++ ) |
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| 405 | { |
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| 406 | for( nm=Imax(0,np-1); nm<=np+1; nm++ ) |
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| 407 | { |
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| 408 | for (nz=0; nz<numSec/3; nz++) { |
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| 409 | if (++counter < numMul) { |
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| 410 | nt = np+nm+nz; |
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| 411 | if ( (nt>0) && (nt<=numSec) ) { |
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| 412 | test = std::exp( Amin( expxu, Amax( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 413 | dum = (pi/anpn)*nt*protmul[counter]*protnorm[nt-1]/(2.0*n*n); |
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| 414 | if (std::fabs(dum) < 1.0) { |
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| 415 | if( test >= 1.0e-10 )excs += dum*test; |
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| 416 | } else { |
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| 417 | excs += dum*test; |
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| 418 | } |
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| 419 | |
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| 420 | if (ran < excs) goto outOfLoop; //-----------------------> |
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| 421 | } |
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| 422 | } |
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| 423 | } |
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| 424 | } |
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| 425 | } |
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| 426 | |
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| 427 | // 3 previous loops continued to the end |
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| 428 | inElastic = false; // quasi-elastic scattering |
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| 429 | return; |
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| 430 | } |
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| 431 | else |
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| 432 | { // target must be a neutron |
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| 433 | counter = -1; |
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| 434 | for( np=0; np<numSec/3; np++ ) |
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| 435 | { |
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| 436 | for( nm=np; nm<=(np+2); nm++ ) |
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| 437 | { |
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| 438 | for (nz=0; nz<numSec/3; nz++) { |
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| 439 | if (++counter < numMul) { |
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| 440 | nt = np+nm+nz; |
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| 441 | if ( (nt>=1) && (nt<=numSec) ) { |
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| 442 | test = std::exp( Amin( expxu, Amax( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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| 443 | dum = (pi/anpn)*nt*neutmul[counter]*neutnorm[nt-1]/(2.0*n*n); |
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| 444 | if (std::fabs(dum) < 1.0) { |
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| 445 | if( test >= 1.0e-10 )excs += dum*test; |
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| 446 | } else { |
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| 447 | excs += dum*test; |
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| 448 | } |
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| 449 | if (ran < excs) goto outOfLoop; // --------------------------> |
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| 450 | } |
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| 451 | } |
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| 452 | } |
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| 453 | } |
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| 454 | } |
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| 455 | // 3 previous loops continued to the end |
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| 456 | inElastic = false; // quasi-elastic scattering. |
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| 457 | return; |
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| 458 | } |
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| 459 | } |
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| 460 | outOfLoop: // <--------------------------------------------- |
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| 461 | |
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| 462 | if( targetCode == protonCode) |
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| 463 | { |
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| 464 | if( np == (1+nm)) |
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| 465 | { |
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| 466 | pv[1] = Neutron; |
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| 467 | } |
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| 468 | else if (np == nm) |
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| 469 | { |
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| 470 | if( G4UniformRand() < 0.75) |
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| 471 | { |
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| 472 | } |
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| 473 | else |
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| 474 | { |
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| 475 | pv[0] = AntiKaonZero; |
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| 476 | pv[1] = Neutron; |
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| 477 | } |
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| 478 | } |
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| 479 | else |
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| 480 | { |
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| 481 | pv[0] = AntiKaonZero; |
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| 482 | } |
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| 483 | } |
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| 484 | else |
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| 485 | { |
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| 486 | if( np == (nm-1)) |
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| 487 | { |
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| 488 | if( G4UniformRand() < 0.5) |
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| 489 | { |
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| 490 | pv[1] = Proton; |
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| 491 | } |
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| 492 | else |
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| 493 | { |
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| 494 | pv[0] = AntiKaonZero; |
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| 495 | } |
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| 496 | } |
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| 497 | else if ( np == nm) |
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| 498 | { |
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| 499 | } |
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| 500 | else |
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| 501 | { |
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| 502 | pv[0] = AntiKaonZero; |
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| 503 | pv[1] = Proton; |
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| 504 | } |
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| 505 | } |
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| 506 | |
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| 507 | if( G4UniformRand() < 0.5 ) |
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| 508 | { |
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| 509 | if( ( (pv[0].getCode() == kaonMinusCode) |
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| 510 | && (pv[1].getCode() == neutronCode) ) |
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| 511 | || ( (pv[0].getCode() == kaonZeroCode) |
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| 512 | && (pv[1].getCode() == protonCode) ) |
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| 513 | || ( (pv[0].getCode() == antiKaonZeroCode) |
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| 514 | && (pv[1].getCode() == protonCode) ) ) |
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| 515 | { |
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| 516 | G4double ran = G4UniformRand(); |
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| 517 | if( pv[1].getCode() == protonCode) |
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| 518 | { |
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| 519 | if(ran < 0.68) |
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| 520 | { |
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| 521 | pv[0] = PionPlus; |
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| 522 | pv[1] = Lambda; |
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| 523 | } |
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| 524 | else if (ran < 0.84) |
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| 525 | { |
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| 526 | pv[0] = PionZero; |
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| 527 | pv[1] = SigmaPlus; |
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| 528 | } |
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| 529 | else |
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| 530 | { |
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| 531 | pv[0] = PionPlus; |
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| 532 | pv[1] = SigmaZero; |
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| 533 | } |
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| 534 | } |
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| 535 | else |
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| 536 | { |
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| 537 | if(ran < 0.68) |
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| 538 | { |
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| 539 | pv[0] = PionMinus; |
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| 540 | pv[1] = Lambda; |
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| 541 | } |
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| 542 | else if (ran < 0.84) |
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| 543 | { |
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| 544 | pv[0] = PionMinus; |
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| 545 | pv[1] = SigmaZero; |
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| 546 | } |
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| 547 | else |
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| 548 | { |
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| 549 | pv[0] = PionZero; |
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| 550 | pv[1] = SigmaMinus; |
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| 551 | } |
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| 552 | } |
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| 553 | } |
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| 554 | else |
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| 555 | { |
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| 556 | G4double ran = G4UniformRand(); |
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| 557 | if (ran < 0.67) |
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| 558 | { |
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| 559 | pv[0] = PionZero; |
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| 560 | pv[1] = Lambda; |
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| 561 | } |
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| 562 | else if (ran < 0.78) |
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| 563 | { |
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| 564 | pv[0] = PionMinus; |
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| 565 | pv[1] = SigmaPlus; |
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| 566 | } |
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| 567 | else if (ran < 0.89) |
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| 568 | { |
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| 569 | pv[0] = PionZero; |
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| 570 | pv[1] = SigmaZero; |
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| 571 | } |
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| 572 | else |
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| 573 | { |
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| 574 | pv[0] = PionPlus; |
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| 575 | pv[1] = SigmaMinus; |
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| 576 | } |
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| 577 | } |
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| 578 | } |
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| 579 | |
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| 580 | |
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| 581 | nt = np + nm + nz; |
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| 582 | while ( nt > 0) |
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| 583 | { |
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| 584 | G4double ran = G4UniformRand(); |
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| 585 | if ( ran < (G4double)np/nt) |
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| 586 | { |
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| 587 | if( np > 0 ) |
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| 588 | { pv[vecLen++] = PionPlus; |
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| 589 | np--; |
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| 590 | } |
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| 591 | } |
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| 592 | else if ( ran < (G4double)(np+nm)/nt) |
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| 593 | { |
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| 594 | if( nm > 0 ) |
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| 595 | { |
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| 596 | pv[vecLen++] = PionMinus; |
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| 597 | nm--; |
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| 598 | } |
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| 599 | } |
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| 600 | else |
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| 601 | { |
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| 602 | if( nz > 0 ) |
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| 603 | { |
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| 604 | pv[vecLen++] = PionZero; |
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| 605 | nz--; |
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| 606 | } |
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| 607 | } |
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| 608 | nt = np + nm + nz; |
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| 609 | } |
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| 610 | if (verboseLevel > 1) |
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| 611 | { |
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| 612 | G4cout << "Particles produced: " ; |
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| 613 | G4cout << pv[0].getName() << " " ; |
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| 614 | G4cout << pv[1].getName() << " " ; |
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| 615 | for (i=2; i < vecLen; i++) |
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| 616 | { |
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| 617 | G4cout << pv[i].getName() << " " ; |
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| 618 | } |
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| 619 | G4cout << G4endl; |
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| 620 | } |
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| 621 | return; |
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| 622 | } |
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| 623 | |
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| 624 | |
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| 625 | |
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| 626 | |
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| 627 | |
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| 628 | |
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| 629 | |
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| 630 | |
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| 631 | |
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