[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 | // G4KaonMinusAbsorption physics process |
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| 27 | // Larry Felawka (TRIUMF), April 1998 |
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| 28 | //--------------------------------------------------------------------- |
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| 29 | |
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| 30 | #include "G4KaonMinusAbsorption.hh" |
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| 31 | #include "G4DynamicParticle.hh" |
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| 32 | #include "G4ParticleTypes.hh" |
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| 33 | #include "Randomize.hh" |
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| 34 | #include <string.h> |
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| 35 | #include <cmath> |
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| 36 | #include <stdio.h> |
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| 37 | |
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| 38 | #define MAX_SECONDARIES 100 |
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| 39 | |
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| 40 | // constructor |
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| 41 | |
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| 42 | G4KaonMinusAbsorption::G4KaonMinusAbsorption(const G4String& processName, |
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| 43 | G4ProcessType aType ) : |
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| 44 | G4VRestProcess (processName, aType), // initialization |
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| 45 | massKaonMinus(G4KaonMinus::KaonMinus()->GetPDGMass()/GeV), |
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| 46 | massGamma(G4Gamma::Gamma()->GetPDGMass()/GeV), |
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| 47 | massPionZero(G4PionZero::PionZero()->GetPDGMass()/GeV), |
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| 48 | massProton(G4Proton::Proton()->GetPDGMass()/GeV), |
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| 49 | massLambda(G4Lambda::Lambda()->GetPDGMass()/GeV), |
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| 50 | pdefKaonMinus(G4KaonMinus::KaonMinus()), |
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| 51 | pdefGamma(G4Gamma::Gamma()), |
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| 52 | pdefPionZero(G4PionZero::PionZero()), |
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| 53 | pdefProton(G4Proton::Proton()), |
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| 54 | pdefNeutron(G4Neutron::Neutron()), |
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| 55 | pdefLambda(G4Lambda::Lambda()), |
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| 56 | pdefDeuteron(G4Deuteron::Deuteron()), |
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| 57 | pdefTriton(G4Triton::Triton()), |
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| 58 | pdefAlpha(G4Alpha::Alpha()) |
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| 59 | { |
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| 60 | if (verboseLevel>0) { |
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| 61 | G4cout << GetProcessName() << " is created "<< G4endl; |
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| 62 | } |
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| 63 | |
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| 64 | pv = new G4GHEKinematicsVector [MAX_SECONDARIES+1]; |
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| 65 | eve = new G4GHEKinematicsVector [MAX_SECONDARIES]; |
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| 66 | gkin = new G4GHEKinematicsVector [MAX_SECONDARIES]; |
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| 67 | |
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| 68 | } |
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| 69 | |
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| 70 | // destructor |
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| 71 | |
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| 72 | G4KaonMinusAbsorption::~G4KaonMinusAbsorption() |
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| 73 | { |
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| 74 | delete [] pv; |
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| 75 | delete [] eve; |
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| 76 | delete [] gkin; |
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| 77 | } |
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| 78 | |
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| 79 | |
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| 80 | // methods............................................................................. |
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| 81 | |
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| 82 | G4bool G4KaonMinusAbsorption::IsApplicable( |
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| 83 | const G4ParticleDefinition& particle |
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| 84 | ) |
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| 85 | { |
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| 86 | return ( &particle == pdefKaonMinus ); |
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| 87 | |
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| 88 | } |
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| 89 | |
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| 90 | // Warning - this method may be optimized away if made "inline" |
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| 91 | G4int G4KaonMinusAbsorption::GetNumberOfSecondaries() |
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| 92 | { |
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| 93 | return ( ngkine ); |
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| 94 | |
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| 95 | } |
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| 96 | |
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| 97 | // Warning - this method may be optimized away if made "inline" |
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| 98 | G4GHEKinematicsVector* G4KaonMinusAbsorption::GetSecondaryKinematics() |
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| 99 | { |
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| 100 | return ( &gkin[0] ); |
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| 101 | |
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| 102 | } |
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| 103 | |
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| 104 | G4double G4KaonMinusAbsorption::AtRestGetPhysicalInteractionLength( |
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| 105 | const G4Track& track, |
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| 106 | G4ForceCondition* condition |
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| 107 | ) |
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| 108 | { |
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| 109 | // beggining of tracking |
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| 110 | ResetNumberOfInteractionLengthLeft(); |
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| 111 | |
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| 112 | // condition is set to "Not Forced" |
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| 113 | *condition = NotForced; |
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| 114 | |
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| 115 | // get mean life time |
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| 116 | currentInteractionLength = GetMeanLifeTime(track, condition); |
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| 117 | |
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| 118 | if ((currentInteractionLength <0.0) || (verboseLevel>2)){ |
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| 119 | G4cout << "G4KaonMinusAbsorptionProcess::AtRestGetPhysicalInteractionLength "; |
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| 120 | G4cout << "[ " << GetProcessName() << "]" <<G4endl; |
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| 121 | track.GetDynamicParticle()->DumpInfo(); |
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| 122 | G4cout << " in Material " << track.GetMaterial()->GetName() <<G4endl; |
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| 123 | G4cout << "MeanLifeTime = " << currentInteractionLength/ns << "[ns]" <<G4endl; |
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| 124 | } |
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| 125 | |
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| 126 | return theNumberOfInteractionLengthLeft * currentInteractionLength; |
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| 127 | |
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| 128 | } |
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| 129 | |
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| 130 | G4VParticleChange* G4KaonMinusAbsorption::AtRestDoIt( |
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| 131 | const G4Track& track, |
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| 132 | const G4Step& |
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| 133 | ) |
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| 134 | // |
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| 135 | // Handles KaonMinus at rest; a KaonMinus can either create secondaries or |
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| 136 | // do nothing (in which case it should be sent back to decay-handling |
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| 137 | // section |
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| 138 | // |
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| 139 | { |
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| 140 | |
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| 141 | // Initialize ParticleChange |
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| 142 | // all members of G4VParticleChange are set to equal to |
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| 143 | // corresponding member in G4Track |
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| 144 | |
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| 145 | aParticleChange.Initialize(track); |
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| 146 | |
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| 147 | // Store some global quantities that depend on current material and particle |
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| 148 | |
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| 149 | globalTime = track.GetGlobalTime()/s; |
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| 150 | G4Material * aMaterial = track.GetMaterial(); |
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| 151 | const G4int numberOfElements = aMaterial->GetNumberOfElements(); |
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| 152 | const G4ElementVector* theElementVector = aMaterial->GetElementVector(); |
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| 153 | |
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| 154 | const G4double* theAtomicNumberDensity = aMaterial->GetAtomicNumDensityVector(); |
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| 155 | G4double normalization = 0; |
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| 156 | for ( G4int i1=0; i1 < numberOfElements; i1++ ) |
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| 157 | { |
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| 158 | normalization += theAtomicNumberDensity[i1] ; // change when nucleon specific |
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| 159 | // probabilities are included. |
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| 160 | } |
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| 161 | G4double runningSum= 0.; |
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| 162 | G4double random = G4UniformRand()*normalization; |
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| 163 | for ( G4int i2=0; i2 < numberOfElements; i2++ ) |
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| 164 | { |
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| 165 | runningSum += theAtomicNumberDensity[i2]; // change when nucleon specific |
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| 166 | // probabilities are included. |
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| 167 | if (random<=runningSum) |
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| 168 | { |
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| 169 | targetCharge = G4double( ((*theElementVector)[i2])->GetZ()); |
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| 170 | targetAtomicMass = (*theElementVector)[i2]->GetN(); |
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| 171 | } |
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| 172 | } |
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| 173 | if (random>runningSum) |
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| 174 | { |
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| 175 | targetCharge = G4double((*theElementVector)[numberOfElements-1]->GetZ()); |
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| 176 | targetAtomicMass = (*theElementVector)[numberOfElements-1]->GetN(); |
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| 177 | |
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| 178 | } |
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| 179 | |
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| 180 | if (verboseLevel>1) { |
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| 181 | G4cout << "G4KaonMinusAbsorption::AtRestDoIt is invoked " <<G4endl; |
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| 182 | } |
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| 183 | |
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| 184 | G4ParticleMomentum momentum; |
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| 185 | G4float localtime; |
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| 186 | |
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| 187 | G4ThreeVector position = track.GetPosition(); |
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| 188 | |
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| 189 | GenerateSecondaries(); // Generate secondaries |
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| 190 | |
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| 191 | aParticleChange.SetNumberOfSecondaries( ngkine ); |
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| 192 | |
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| 193 | for ( G4int isec = 0; isec < ngkine; isec++ ) { |
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| 194 | G4DynamicParticle* aNewParticle = new G4DynamicParticle; |
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| 195 | aNewParticle->SetDefinition( gkin[isec].GetParticleDef() ); |
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| 196 | aNewParticle->SetMomentum( gkin[isec].GetMomentum() * GeV ); |
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| 197 | |
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| 198 | localtime = globalTime + gkin[isec].GetTOF(); |
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| 199 | |
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| 200 | G4Track* aNewTrack = new G4Track( aNewParticle, localtime*s, position ); |
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| 201 | aNewTrack->SetTouchableHandle(track.GetTouchableHandle()); |
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| 202 | aParticleChange.AddSecondary( aNewTrack ); |
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| 203 | |
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| 204 | } |
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| 205 | |
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| 206 | aParticleChange.ProposeLocalEnergyDeposit( 0.0*GeV ); |
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| 207 | |
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| 208 | aParticleChange.ProposeTrackStatus(fStopAndKill); // Kill the incident KaonMinus |
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| 209 | |
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| 210 | // clear InteractionLengthLeft |
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| 211 | |
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| 212 | ResetNumberOfInteractionLengthLeft(); |
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| 213 | |
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| 214 | return &aParticleChange; |
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| 215 | |
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| 216 | } |
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| 217 | |
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| 218 | |
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| 219 | void G4KaonMinusAbsorption::GenerateSecondaries() |
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| 220 | { |
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| 221 | static G4int index; |
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| 222 | static G4int l; |
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| 223 | static G4int nopt; |
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| 224 | static G4int i; |
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| 225 | static G4ParticleDefinition* jnd; |
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| 226 | |
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| 227 | for (i = 1; i <= MAX_SECONDARIES; ++i) { |
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| 228 | pv[i].SetZero(); |
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| 229 | } |
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| 230 | |
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| 231 | ngkine = 0; // number of generated secondary particles |
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| 232 | ntot = 0; |
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| 233 | result.SetZero(); |
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| 234 | result.SetMass( massKaonMinus ); |
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| 235 | result.SetKineticEnergyAndUpdate( 0. ); |
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| 236 | result.SetTOF( 0. ); |
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| 237 | result.SetParticleDef( pdefKaonMinus ); |
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| 238 | |
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| 239 | KaonMinusAbsorption(&nopt); |
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| 240 | |
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| 241 | // *** CHECK WHETHER THERE ARE NEW PARTICLES GENERATED *** |
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| 242 | if (ntot != 0 || result.GetParticleDef() != pdefKaonMinus) { |
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| 243 | // *** CURRENT PARTICLE IS NOT THE SAME AS IN THE BEGINNING OR/AND *** |
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| 244 | // *** ONE OR MORE SECONDARIES HAVE BEEN GENERATED *** |
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| 245 | |
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| 246 | // --- INITIAL PARTICLE TYPE HAS BEEN CHANGED ==> PUT NEW TYPE ON --- |
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| 247 | // --- THE GEANT TEMPORARY STACK --- |
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| 248 | |
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| 249 | // --- PUT PARTICLE ON THE STACK --- |
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| 250 | gkin[0] = result; |
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| 251 | gkin[0].SetTOF( result.GetTOF() * 5e-11 ); |
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| 252 | ngkine = 1; |
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| 253 | |
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| 254 | // --- ALL QUANTITIES ARE TAKEN FROM THE GHEISHA STACK WHERE THE --- |
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| 255 | // --- CONVENTION IS THE FOLLOWING --- |
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| 256 | |
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| 257 | // --- ONE OR MORE SECONDARIES HAVE BEEN GENERATED --- |
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| 258 | for (l = 1; l <= ntot; ++l) { |
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| 259 | index = l - 1; |
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| 260 | jnd = eve[index].GetParticleDef(); |
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| 261 | |
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| 262 | // --- ADD PARTICLE TO THE STACK IF STACK NOT YET FULL --- |
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| 263 | if (ngkine < MAX_SECONDARIES) { |
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| 264 | gkin[ngkine] = eve[index]; |
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| 265 | gkin[ngkine].SetTOF( eve[index].GetTOF() * 5e-11 ); |
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| 266 | ++ngkine; |
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| 267 | } |
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| 268 | } |
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| 269 | } |
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| 270 | else { |
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| 271 | // --- NO SECONDARIES GENERATED AND PARTICLE IS STILL THE SAME --- |
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| 272 | // --- ==> COPY EVERYTHING BACK IN THE CURRENT GEANT STACK --- |
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| 273 | ngkine = 0; |
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| 274 | ntot = 0; |
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| 275 | globalTime += result.GetTOF() * G4float(5e-11); |
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| 276 | } |
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| 277 | |
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| 278 | // --- LIMIT THE VALUE OF NGKINE IN CASE OF OVERFLOW --- |
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| 279 | ngkine = G4int(std::min(ngkine,G4int(MAX_SECONDARIES))); |
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| 280 | |
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| 281 | } // GenerateSecondaries |
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| 282 | |
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| 283 | |
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| 284 | void G4KaonMinusAbsorption::Poisso(G4float xav, G4int *iran) |
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| 285 | { |
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| 286 | static G4int i; |
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| 287 | static G4float r, p1, p2, p3; |
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| 288 | static G4int mm; |
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| 289 | static G4float rr, ran, rrr, ran1; |
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| 290 | |
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| 291 | // *** GENERATION OF POISSON DISTRIBUTION *** |
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| 292 | // *** NVE 16-MAR-1988 CERN GENEVA *** |
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| 293 | // ORIGIN : H.FESEFELDT (27-OCT-1983) |
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| 294 | |
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| 295 | // --- USE NORMAL DISTRIBUTION FOR <X> > 9.9 --- |
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| 296 | if (xav > G4float(9.9)) { |
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| 297 | // ** NORMAL DISTRIBUTION WITH SIGMA**2 = <X> |
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| 298 | Normal(&ran1); |
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| 299 | ran1 = xav + ran1 * std::sqrt(xav); |
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| 300 | *iran = G4int(ran1); |
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| 301 | if (*iran < 0) { |
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| 302 | *iran = 0; |
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| 303 | } |
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| 304 | } |
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| 305 | else { |
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| 306 | mm = G4int(xav * G4float(5.)); |
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| 307 | *iran = 0; |
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| 308 | if (mm > 0) { |
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| 309 | r = std::exp(-G4double(xav)); |
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| 310 | ran1 = G4UniformRand(); |
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| 311 | if (ran1 > r) { |
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| 312 | rr = r; |
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| 313 | for (i = 1; i <= mm; ++i) { |
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| 314 | ++(*iran); |
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| 315 | if (i <= 5) { |
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| 316 | rrr = std::pow(xav, G4float(i)) / NFac(i); |
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| 317 | } |
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| 318 | // ** STIRLING' S FORMULA FOR LARGE NUMBERS |
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| 319 | if (i > 5) { |
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| 320 | rrr = std::exp(i * std::log(xav) - |
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| 321 | (i + G4float(.5)) * std::log(i * G4float(1.)) + |
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| 322 | i - G4float(.9189385)); |
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| 323 | } |
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| 324 | rr += r * rrr; |
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| 325 | if (ran1 <= rr) { |
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| 326 | break; |
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| 327 | } |
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| 328 | } |
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| 329 | } |
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| 330 | } |
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| 331 | else { |
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| 332 | // ** FOR VERY SMALL XAV TRY IRAN=1,2,3 |
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| 333 | p1 = xav * std::exp(-G4double(xav)); |
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| 334 | p2 = xav * p1 / G4float(2.); |
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| 335 | p3 = xav * p2 / G4float(3.); |
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| 336 | ran = G4UniformRand(); |
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| 337 | if (ran >= p3) { |
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| 338 | if (ran >= p2) { |
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| 339 | if (ran >= p1) { |
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| 340 | *iran = 0; |
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| 341 | } |
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| 342 | else { |
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| 343 | *iran = 1; |
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| 344 | } |
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| 345 | } |
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| 346 | else { |
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| 347 | *iran = 2; |
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| 348 | } |
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| 349 | } |
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| 350 | else { |
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| 351 | *iran = 3; |
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| 352 | } |
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| 353 | } |
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| 354 | } |
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| 355 | |
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| 356 | } // Poisso |
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| 357 | |
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| 358 | |
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| 359 | G4int G4KaonMinusAbsorption::NFac(G4int n) |
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| 360 | { |
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| 361 | G4int ret_val; |
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| 362 | |
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| 363 | static G4int i, m; |
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| 364 | |
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| 365 | // *** NVE 16-MAR-1988 CERN GENEVA *** |
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| 366 | // ORIGIN : H.FESEFELDT (27-OCT-1983) |
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| 367 | |
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| 368 | ret_val = 1; |
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| 369 | m = n; |
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| 370 | if (m > 1) { |
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| 371 | if (m > 10) { |
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| 372 | m = 10; |
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| 373 | } |
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| 374 | for (i = 2; i <= m; ++i) { |
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| 375 | ret_val *= i; |
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| 376 | } |
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| 377 | } |
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| 378 | return ret_val; |
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| 379 | |
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| 380 | } // NFac |
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| 381 | |
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| 382 | |
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| 383 | void G4KaonMinusAbsorption::Normal(G4float *ran) |
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| 384 | { |
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| 385 | static G4int i; |
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| 386 | |
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| 387 | // *** NVE 14-APR-1988 CERN GENEVA *** |
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| 388 | // ORIGIN : H.FESEFELDT (27-OCT-1983) |
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| 389 | |
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| 390 | *ran = G4float(-6.); |
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| 391 | for (i = 1; i <= 12; ++i) { |
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| 392 | *ran += G4UniformRand(); |
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| 393 | } |
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| 394 | |
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| 395 | } // Normal |
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| 396 | |
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| 397 | |
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| 398 | void G4KaonMinusAbsorption::KaonMinusAbsorption(G4int *nopt) |
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| 399 | { |
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| 400 | static G4int i; |
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| 401 | static G4int nt, nbl; |
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| 402 | static G4float ran, pcm; |
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| 403 | static G4int isw; |
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| 404 | static G4float tex; |
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| 405 | static G4float ran2, tof1, ekin, ekin1, ekin2, black; |
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| 406 | static G4float pnrat; |
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| 407 | static G4ParticleDefinition* ipa1; |
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| 408 | static G4ParticleDefinition* inve; |
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| 409 | |
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| 410 | // *** CHARGED KAON ABSORPTION BY A NUCLEUS *** |
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| 411 | // *** NVE 04-MAR-1988 CERN GENEVA *** |
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| 412 | // ORIGIN : H.FESEFELDT (09-JULY-1987) |
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| 413 | |
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| 414 | // PRODUCTION OF A HYPERFRAGMENT WITH SUBSEQUENT DECAY |
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| 415 | // PANOFSKY RATIO (K- P --> LAMBDA PI0/K- P --> LAMBDA GAMMA) = 3/2 |
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| 416 | |
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| 417 | pv[1].SetZero(); |
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| 418 | pv[1].SetMass( massKaonMinus ); |
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| 419 | pv[1].SetKineticEnergyAndUpdate( 0. ); |
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| 420 | pv[1].SetTOF( result.GetTOF() ); |
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| 421 | pv[1].SetParticleDef( result.GetParticleDef() ); |
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| 422 | if (targetAtomicMass <= G4float(1.5)) { |
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| 423 | ran = G4UniformRand(); |
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| 424 | tof1 = std::log(ran) * G4float(-12.5); |
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| 425 | tof1 *= G4float(20.); |
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| 426 | ran = G4UniformRand(); |
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| 427 | isw = 1; |
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| 428 | if (ran < G4float(.33)) { |
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| 429 | isw = 2; |
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| 430 | } |
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| 431 | *nopt = isw; |
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| 432 | pv[3].SetZero(); |
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| 433 | pv[3].SetMass( massLambda ); |
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| 434 | pv[3].SetKineticEnergyAndUpdate( 0. ); |
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| 435 | pv[3].SetTOF( result.GetTOF() + tof1 ); |
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| 436 | pv[3].SetParticleDef( pdefLambda ); |
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| 437 | pcm = massKaonMinus + massProton - massLambda; |
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| 438 | if (isw != 1) { |
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| 439 | pv[2].SetZero(); |
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| 440 | pv[2].SetMass( massGamma ); |
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| 441 | pv[2].SetKineticEnergyAndUpdate( pcm ); |
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| 442 | pv[2].SetTOF( result.GetTOF() + tof1 ); |
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| 443 | pv[2].SetParticleDef( pdefGamma ); |
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| 444 | } |
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| 445 | else { |
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| 446 | pcm = pcm * pcm - massPionZero * massPionZero; |
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| 447 | if (pcm <= G4float(0.)) { |
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| 448 | pcm = G4float(0.); |
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| 449 | } |
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| 450 | pv[2].SetZero(); |
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| 451 | pv[2].SetEnergy( std::sqrt(pcm + massPionZero * massPionZero) ); |
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| 452 | pv[2].SetMassAndUpdate( massPionZero ); |
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| 453 | pv[2].SetTOF( result.GetTOF() + tof1 ); |
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| 454 | pv[2].SetParticleDef( pdefPionZero ); |
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| 455 | } |
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| 456 | result = pv[2]; |
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| 457 | if (ntot < MAX_SECONDARIES-1) { |
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| 458 | eve[ntot++] = pv[3]; |
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| 459 | } |
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| 460 | } |
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| 461 | else { |
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| 462 | // ** |
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| 463 | // ** STAR PRODUCTION FOR PION ABSORPTION IN HEAVY ELEMENTS |
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| 464 | // ** |
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| 465 | evapEnergy1 = G4float(.3); |
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| 466 | evapEnergy3 = G4float(.15); |
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| 467 | nt = 1; |
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| 468 | tex = evapEnergy1; |
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| 469 | black = std::log(targetAtomicMass) * G4float(.5); |
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| 470 | Poisso(black, &nbl); |
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| 471 | if (nt + nbl > (MAX_SECONDARIES - 2)) { |
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| 472 | nbl = (MAX_SECONDARIES - 2) - nt; |
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| 473 | } |
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| 474 | if (nbl <= 0) { |
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| 475 | nbl = 1; |
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| 476 | } |
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| 477 | ekin = tex / nbl; |
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| 478 | ekin2 = G4float(0.); |
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| 479 | for (i = 1; i <= nbl; ++i) { |
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| 480 | if (nt == (MAX_SECONDARIES - 2)) { |
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| 481 | continue; |
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| 482 | } |
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| 483 | ran2 = G4UniformRand(); |
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| 484 | ekin1 = -G4double(ekin) * std::log(ran2); |
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| 485 | ekin2 += ekin1; |
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| 486 | ipa1 = pdefNeutron; |
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| 487 | pnrat = G4float(1.) - targetCharge / targetAtomicMass; |
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| 488 | if (G4UniformRand() > pnrat) { |
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| 489 | ipa1 = pdefProton; |
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| 490 | } |
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| 491 | ++nt; |
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| 492 | pv[nt].SetZero(); |
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| 493 | pv[nt].SetMass( ipa1->GetPDGMass()/GeV ); |
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| 494 | pv[nt].SetKineticEnergyAndUpdate( ekin1 ); |
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| 495 | pv[nt].SetTOF( 2. ); |
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| 496 | pv[nt].SetParticleDef( ipa1 ); |
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| 497 | if (ekin2 > tex) { |
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| 498 | break; |
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| 499 | } |
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| 500 | } |
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| 501 | tex = evapEnergy3; |
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| 502 | black = std::log(targetAtomicMass) * G4float(.5); |
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| 503 | Poisso(black, &nbl); |
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| 504 | if (nt + nbl > (MAX_SECONDARIES - 2)) { |
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| 505 | nbl = (MAX_SECONDARIES - 2) - nt; |
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| 506 | } |
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| 507 | if (nbl <= 0) { |
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| 508 | nbl = 1; |
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| 509 | } |
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| 510 | ekin = tex / nbl; |
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| 511 | ekin2 = G4float(0.); |
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| 512 | for (i = 1; i <= nbl; ++i) { |
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| 513 | if (nt == (MAX_SECONDARIES - 2)) { |
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| 514 | continue; |
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| 515 | } |
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| 516 | ran2 = G4UniformRand(); |
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| 517 | ekin1 = -G4double(ekin) * std::log(ran2); |
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| 518 | ekin2 += ekin1; |
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| 519 | ++nt; |
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| 520 | ran = G4UniformRand(); |
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| 521 | inve = pdefDeuteron; |
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| 522 | if (ran > G4float(.6)) { |
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| 523 | inve = pdefTriton; |
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| 524 | } |
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| 525 | if (ran > G4float(.9)) { |
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| 526 | inve = pdefAlpha; |
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| 527 | } |
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| 528 | // PV(5,NT)=(ABS(IPA(NT))-28)*RMASS(14) <-- Wrong! (LF) |
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| 529 | pv[nt].SetZero(); |
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| 530 | pv[nt].SetMass( inve->GetPDGMass()/GeV ); |
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| 531 | pv[nt].SetKineticEnergyAndUpdate( ekin1 ); |
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| 532 | pv[nt].SetTOF( 2. ); |
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| 533 | pv[nt].SetParticleDef( inve ); |
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| 534 | if (ekin2 > tex) { |
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| 535 | break; |
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| 536 | } |
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| 537 | } |
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| 538 | // ** |
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| 539 | // ** STORE ON EVENT COMMON |
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| 540 | // ** |
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| 541 | ran = G4UniformRand(); |
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| 542 | tof1 = std::log(ran) * G4float(-12.5); |
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| 543 | tof1 *= G4float(20.); |
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| 544 | for (i = 2; i <= nt; ++i) { |
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| 545 | pv[i].SetTOF( result.GetTOF() + tof1 ); |
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| 546 | } |
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| 547 | result = pv[2]; |
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| 548 | for (i = 3; i <= nt; ++i) { |
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| 549 | if (ntot >= MAX_SECONDARIES) { |
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| 550 | break; |
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| 551 | } |
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| 552 | eve[ntot++] = pv[i]; |
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| 553 | } |
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| 554 | } |
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| 555 | |
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| 556 | } // KaonMinusAbsorption |
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