[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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[962] | 26 | // 080602 Fix memory leaks by T. Koi |
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| 27 | // 081120 Add deltaT in signature of CalKinematicsOfBinaryCollisions |
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| 28 | // Add several required updating of Mean Filed |
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| 29 | // Modified handling of absorption case by T. Koi |
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| 30 | // |
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[819] | 31 | #include "G4QMDCollision.hh" |
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| 32 | #include "G4ParticleDefinition.hh" |
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| 33 | #include "G4Scatterer.hh" |
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| 34 | #include "Randomize.hh" |
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| 35 | |
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| 36 | G4QMDCollision::G4QMDCollision() |
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| 37 | : deltar ( 4 ) |
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| 38 | , bcmax0 ( 1.323142 ) // NN maximum impact parameter |
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| 39 | , bcmax1 ( 2.523 ) // others maximum impact parameter |
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| 40 | , sig0 ( 55 ) // NN cross section |
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| 41 | , sig1 ( 200 ) // others cross section |
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| 42 | , epse ( 0.0001 ) |
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| 43 | { |
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| 44 | theScatterer = new G4Scatterer(); |
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| 45 | } |
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| 46 | |
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| 47 | |
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| 48 | |
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| 49 | G4QMDCollision::~G4QMDCollision() |
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| 50 | { |
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| 51 | delete theScatterer; |
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| 52 | } |
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| 53 | |
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| 54 | |
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[962] | 55 | void G4QMDCollision::CalKinematicsOfBinaryCollisions( G4double dt ) |
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[819] | 56 | { |
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[962] | 57 | G4double deltaT = dt; |
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[819] | 58 | |
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| 59 | G4int n = theSystem->GetTotalNumberOfParticipant(); |
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[962] | 60 | //081118 |
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| 61 | //G4int nb = 0; |
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| 62 | for ( G4int i = 0 ; i < n ; i++ ) |
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| 63 | { |
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| 64 | theSystem->GetParticipant( i )->UnsetHitMark(); |
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| 65 | theSystem->GetParticipant( i )->UnsetHitMark(); |
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| 66 | //nb += theSystem->GetParticipant( i )->GetBaryonNumber(); |
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| 67 | } |
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| 68 | //G4cout << "nb = " << nb << " n = " << n << G4endl; |
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[819] | 69 | |
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[962] | 70 | |
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[819] | 71 | //071101 |
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| 72 | for ( G4int i = 0 ; i < n ; i++ ) |
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| 73 | { |
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[962] | 74 | |
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[819] | 75 | //std::cout << i << " " << theSystem->GetParticipant( i )->GetDefinition()->GetParticleName() << " " << theSystem->GetParticipant( i )->GetPosition() << std::endl; |
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[962] | 76 | |
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[819] | 77 | if ( theSystem->GetParticipant( i )->GetDefinition()->IsShortLived() ) |
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| 78 | { |
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[962] | 79 | |
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| 80 | G4bool decayed = false; |
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| 81 | |
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[819] | 82 | G4ParticleDefinition* pd0 = theSystem->GetParticipant( i )->GetDefinition(); |
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| 83 | G4ThreeVector p0 = theSystem->GetParticipant( i )->GetMomentum(); |
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| 84 | G4ThreeVector r0 = theSystem->GetParticipant( i )->GetPosition(); |
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| 85 | |
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| 86 | G4LorentzVector p40 = theSystem->GetParticipant( i )->Get4Momentum(); |
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| 87 | |
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[962] | 88 | G4double eini = theMeanField->GetTotalPotential() + p40.e(); |
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[819] | 89 | |
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| 90 | G4int n0 = theSystem->GetTotalNumberOfParticipant(); |
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| 91 | G4int i0 = 0; |
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[962] | 92 | |
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| 93 | G4bool isThisEnergyOK = false; |
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| 94 | |
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[819] | 95 | for ( G4int ii = 0 ; ii < 4 ; ii++ ) |
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[962] | 96 | { |
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[819] | 97 | |
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[962] | 98 | //G4LorentzVector p4 = theSystem->GetParticipant( i )->Get4Momentum(); |
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| 99 | G4LorentzVector p400 = p40; |
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[819] | 100 | |
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[962] | 101 | p400 *= GeV; |
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| 102 | //G4KineticTrack kt( theSystem->GetParticipant( i )->GetDefinition() , 0.0 , (theSystem->GetParticipant( i )->GetPosition())*fermi , p4 ); |
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| 103 | G4KineticTrack kt( pd0 , 0.0 , r0*fermi , p400 ); |
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| 104 | //std::cout << "G4KineticTrack " << i << " " << kt.GetDefinition()->GetParticleName() << kt.GetPosition() << std::endl; |
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| 105 | G4KineticTrackVector* secs = NULL; |
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| 106 | secs = kt.Decay(); |
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| 107 | G4int id = 0; |
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| 108 | G4double et = 0; |
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| 109 | if ( secs ) |
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[819] | 110 | { |
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[962] | 111 | for ( G4KineticTrackVector::iterator it |
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| 112 | = secs->begin() ; it != secs->end() ; it++ ) |
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| 113 | { |
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| 114 | /* |
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| 115 | G4cout << "G4KineticTrack" |
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| 116 | << " " << (*it)->GetDefinition()->GetParticleName() |
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| 117 | << " " << (*it)->Get4Momentum() |
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| 118 | << " " << (*it)->GetPosition()/fermi |
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| 119 | << G4endl; |
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| 120 | */ |
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| 121 | if ( id == 0 ) |
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[819] | 122 | { |
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[962] | 123 | theSystem->GetParticipant( i )->SetDefinition( (*it)->GetDefinition() ); |
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| 124 | theSystem->GetParticipant( i )->SetMomentum( (*it)->Get4Momentum().v()/GeV ); |
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| 125 | theSystem->GetParticipant( i )->SetPosition( (*it)->GetPosition()/fermi ); |
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| 126 | //theMeanField->Cal2BodyQuantities( i ); |
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| 127 | et += (*it)->Get4Momentum().e()/GeV; |
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[819] | 128 | } |
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[962] | 129 | if ( id > 0 ) |
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| 130 | { |
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| 131 | // Append end; |
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| 132 | theSystem->SetParticipant ( new G4QMDParticipant ( (*it)->GetDefinition() , (*it)->Get4Momentum().v()/GeV , (*it)->GetPosition()/fermi ) ); |
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| 133 | et += (*it)->Get4Momentum().e()/GeV; |
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| 134 | if ( id > 1 ) |
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| 135 | { |
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| 136 | //081118 |
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| 137 | //G4cout << "G4QMDCollision id >2; id= " << id << G4endl; |
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| 138 | } |
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| 139 | } |
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| 140 | id++; // number of daughter particles |
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[819] | 141 | |
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[962] | 142 | delete *it; |
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| 143 | } |
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| 144 | |
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| 145 | theMeanField->Update(); |
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| 146 | i0 = id-1; // 0 enter to i |
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| 147 | |
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| 148 | delete secs; |
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[819] | 149 | } |
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| 150 | |
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[962] | 151 | // EnergyCheck |
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[819] | 152 | |
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[962] | 153 | G4double efin = theMeanField->GetTotalPotential() + et; |
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| 154 | //std::cout << std::abs ( eini - efin ) - epse << std::endl; |
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| 155 | // std::cout << std::abs ( eini - efin ) - epse*10 << std::endl; |
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| 156 | // *10 TK |
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| 157 | if ( std::abs ( eini - efin ) < epse*10 ) |
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[819] | 158 | { |
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[962] | 159 | // Energy OK |
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| 160 | isThisEnergyOK = true; |
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| 161 | break; |
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[819] | 162 | } |
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[962] | 163 | else |
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| 164 | { |
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| 165 | |
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| 166 | theSystem->GetParticipant( i )->SetDefinition( pd0 ); |
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| 167 | theSystem->GetParticipant( i )->SetPosition( r0 ); |
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| 168 | theSystem->GetParticipant( i )->SetMomentum( p0 ); |
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| 169 | |
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| 170 | for ( G4int i0i = 0 ; i0i < id-1 ; i0i++ ) |
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| 171 | { |
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| 172 | //081118 |
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| 173 | //std::cout << "Decay Energitically Blocked deleteing " << i0i+n0 << std::endl; |
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| 174 | theSystem->DeleteParticipant( i0i+n0 ); |
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| 175 | } |
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| 176 | //081103 |
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| 177 | theMeanField->Update(); |
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| 178 | } |
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| 179 | |
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[819] | 180 | } |
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| 181 | |
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[962] | 182 | |
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[819] | 183 | // Pauli Check |
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| 184 | if ( isThisEnergyOK == true ) |
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| 185 | { |
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[962] | 186 | if ( theMeanField->IsPauliBlocked ( i ) != true ) |
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[819] | 187 | { |
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[962] | 188 | |
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| 189 | G4bool allOK = true; |
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[819] | 190 | for ( G4int i0i = 0 ; i0i < i0 ; i0i++ ) |
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| 191 | { |
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| 192 | if ( theMeanField->IsPauliBlocked ( i0i+n0 ) == true ) |
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| 193 | { |
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| 194 | allOK = false; |
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| 195 | break; |
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| 196 | } |
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| 197 | } |
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| 198 | |
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[962] | 199 | if ( allOK ) |
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| 200 | { |
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| 201 | decayed = true; //Decay Succeeded |
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| 202 | } |
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[819] | 203 | } |
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[962] | 204 | |
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[819] | 205 | } |
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| 206 | // |
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| 207 | |
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[962] | 208 | if ( decayed ) |
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| 209 | { |
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| 210 | //081119 |
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| 211 | //G4cout << "Decay Suceeded! " << std::endl; |
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| 212 | theSystem->GetParticipant( i )->SetHitMark(); |
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| 213 | for ( G4int i0i = 0 ; i0i < i0 ; i0i++ ) |
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| 214 | { |
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| 215 | theSystem->GetParticipant( i0i+n0 )->SetHitMark(); |
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| 216 | } |
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[819] | 217 | |
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[962] | 218 | } |
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| 219 | else |
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[819] | 220 | { |
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[962] | 221 | |
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| 222 | // Decay Blocked and re-enter orginal participant; |
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| 223 | |
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| 224 | if ( isThisEnergyOK == true ) // for false case already done |
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| 225 | { |
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| 226 | |
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| 227 | theSystem->GetParticipant( i )->SetDefinition( pd0 ); |
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| 228 | theSystem->GetParticipant( i )->SetPosition( r0 ); |
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| 229 | theSystem->GetParticipant( i )->SetMomentum( p0 ); |
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| 230 | |
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| 231 | for ( G4int i0i = 0 ; i0i < i0 ; i0i++ ) |
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| 232 | { |
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| 233 | //081118 |
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| 234 | //std::cout << "Decay Blocked deleteing " << i0i+n0 << std::endl; |
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| 235 | theSystem->DeleteParticipant( i0i+n0 ); |
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| 236 | } |
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| 237 | //081103 |
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| 238 | theMeanField->Update(); |
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| 239 | } |
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| 240 | |
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[819] | 241 | } |
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[962] | 242 | |
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| 243 | } //shortlive |
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| 244 | } // go next participant |
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[819] | 245 | //071101 |
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| 246 | |
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| 247 | |
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| 248 | n = theSystem->GetTotalNumberOfParticipant(); |
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| 249 | |
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[962] | 250 | //081118 |
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| 251 | //for ( G4int i = 1 ; i < n ; i++ ) |
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| 252 | for ( G4int i = 1 ; i < theSystem->GetTotalNumberOfParticipant() ; i++ ) |
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[819] | 253 | { |
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| 254 | |
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| 255 | //std::cout << "Collision i " << i << std::endl; |
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[962] | 256 | if ( theSystem->GetParticipant( i )->IsThisHit() ) continue; |
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[819] | 257 | |
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| 258 | G4ThreeVector ri = theSystem->GetParticipant( i )->GetPosition(); |
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| 259 | G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum(); |
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| 260 | G4double rmi = theSystem->GetParticipant( i )->GetMass(); |
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| 261 | G4ParticleDefinition* pdi = theSystem->GetParticipant( i )->GetDefinition(); |
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| 262 | |
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| 263 | //std::cout << " p4i00 " << p4i << std::endl; |
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| 264 | for ( G4int j = 0 ; j < i ; j++ ) |
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| 265 | { |
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| 266 | |
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[962] | 267 | |
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[819] | 268 | /* |
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| 269 | std::cout << "Collision " << i << " " << theSystem->GetParticipant( i )->IsThisProjectile() << std::endl; |
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| 270 | std::cout << "Collision " << j << " " << theSystem->GetParticipant( j )->IsThisProjectile() << std::endl; |
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| 271 | std::cout << "Collision " << i << " " << theSystem->GetParticipant( i )->IsThisTarget() << std::endl; |
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| 272 | std::cout << "Collision " << j << " " << theSystem->GetParticipant( j )->IsThisTarget() << std::endl; |
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| 273 | */ |
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| 274 | |
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| 275 | // Only 1 Collision allowed for each particle in a time step. |
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[962] | 276 | //081119 |
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| 277 | if ( theSystem->GetParticipant( i )->IsThisHit() ) continue; |
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| 278 | if ( theSystem->GetParticipant( j )->IsThisHit() ) continue; |
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[819] | 279 | |
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[962] | 280 | //std::cout << "Collision " << i << " " << j << std::endl; |
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| 281 | |
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[819] | 282 | // Do not allow collision between nucleons in target/projectile til its first collision. |
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| 283 | if ( theSystem->GetParticipant( i )->IsThisProjectile() ) |
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| 284 | { |
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| 285 | if ( theSystem->GetParticipant( j )->IsThisProjectile() ) continue; |
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| 286 | } |
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| 287 | else if ( theSystem->GetParticipant( i )->IsThisTarget() ) |
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| 288 | { |
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| 289 | if ( theSystem->GetParticipant( j )->IsThisTarget() ) continue; |
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| 290 | } |
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| 291 | |
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| 292 | |
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| 293 | G4ThreeVector rj = theSystem->GetParticipant( j )->GetPosition(); |
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| 294 | G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum(); |
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| 295 | G4double rmj = theSystem->GetParticipant( j )->GetMass(); |
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| 296 | G4ParticleDefinition* pdj = theSystem->GetParticipant( j )->GetDefinition(); |
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| 297 | |
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| 298 | G4double rr2 = theMeanField->GetRR2( i , j ); |
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| 299 | |
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| 300 | // Here we assume elab (beam momentum less than 5 GeV/n ) |
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| 301 | if ( rr2 > deltar*deltar ) continue; |
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| 302 | |
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| 303 | G4double s = (p4i+p4j)*(p4i+p4j); |
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| 304 | |
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| 305 | G4double srt = std::sqrt ( s ); |
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| 306 | |
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| 307 | G4double cutoff = 0.0; |
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| 308 | G4double bcmax = 0.0; |
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| 309 | G4double sig = 0.0; |
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| 310 | |
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| 311 | if ( rmi < 0.94 && rmj < 0.94 ) |
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| 312 | { |
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| 313 | // nucleon or pion case |
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| 314 | cutoff = rmi + rmj + 0.02; |
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| 315 | bcmax = bcmax0; |
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| 316 | sig = sig0; |
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| 317 | } |
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| 318 | else |
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| 319 | { |
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| 320 | cutoff = rmi + rmj; |
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| 321 | bcmax = bcmax1; |
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| 322 | sig = sig1; |
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| 323 | } |
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| 324 | |
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| 325 | //std::cout << "Collision cutoff " << i << " " << j << " " << cutoff << std::endl; |
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| 326 | if ( srt < cutoff ) continue; |
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| 327 | |
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| 328 | G4ThreeVector dr = ri - rj; |
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| 329 | G4double rsq = dr*dr; |
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| 330 | |
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| 331 | G4double pij = p4i*p4j; |
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| 332 | G4double pidr = p4i.vect()*dr; |
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| 333 | G4double pjdr = p4j.vect()*dr; |
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| 334 | |
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| 335 | G4double aij = 1.0 - ( rmi*rmj /pij ) * ( rmi*rmj /pij ); |
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| 336 | G4double bij = pidr / rmi - pjdr*rmi/pij; |
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| 337 | G4double cij = rsq + ( pidr / rmi ) * ( pidr / rmi ); |
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| 338 | G4double brel = std::sqrt ( std::abs ( cij - bij*bij/aij ) ); |
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| 339 | |
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| 340 | if ( brel > bcmax ) continue; |
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| 341 | //std::cout << "collisions3 " << std::endl; |
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| 342 | |
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| 343 | G4double bji = -pjdr/rmj + pidr * rmj /pij; |
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| 344 | |
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| 345 | G4double ti = ( pidr/rmi - bij / aij ) * p4i.e() / rmi; |
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| 346 | G4double tj = (-pjdr/rmj - bji / aij ) * p4j.e() / rmj; |
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| 347 | |
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| 348 | |
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| 349 | /* |
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| 350 | std::cout << "collisions4 p4i " << p4i << std::endl; |
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| 351 | std::cout << "collisions4 ri " << ri << std::endl; |
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| 352 | std::cout << "collisions4 p4j " << p4j << std::endl; |
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| 353 | std::cout << "collisions4 rj " << rj << std::endl; |
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| 354 | std::cout << "collisions4 dr " << dr << std::endl; |
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| 355 | std::cout << "collisions4 pij " << pij << std::endl; |
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| 356 | std::cout << "collisions4 aij " << aij << std::endl; |
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| 357 | std::cout << "collisions4 bij bji " << bij << " " << bji << std::endl; |
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| 358 | std::cout << "collisions4 pidr pjdr " << pidr << " " << pjdr << std::endl; |
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| 359 | std::cout << "collisions4 p4i.e() p4j.e() " << p4i.e() << " " << p4j.e() << std::endl; |
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| 360 | std::cout << "collisions4 rmi rmj " << rmi << " " << rmj << std::endl; |
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| 361 | std::cout << "collisions4 " << ti << " " << tj << std::endl; |
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| 362 | */ |
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| 363 | if ( std::abs ( ti + tj ) > deltaT ) continue; |
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| 364 | //std::cout << "collisions4 " << std::endl; |
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| 365 | |
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| 366 | G4ThreeVector beta = ( p4i + p4j ).boostVector(); |
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| 367 | |
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| 368 | G4LorentzVector p = p4i; |
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| 369 | G4LorentzVector p4icm = p.boost( p.findBoostToCM ( p4j ) ); |
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| 370 | G4ThreeVector pcm = p4icm.vect(); |
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| 371 | |
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| 372 | G4double prcm = pcm.mag(); |
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| 373 | |
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| 374 | if ( prcm <= 0.00001 ) continue; |
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| 375 | //std::cout << "collisions5 " << std::endl; |
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| 376 | |
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| 377 | G4bool energetically_forbidden = !( CalFinalStateOfTheBinaryCollision ( i , j ) ); // Use Geant4 Collision Library |
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| 378 | //G4bool energetically_forbidden = !( CalFinalStateOfTheBinaryCollisionJQMD ( sig , cutoff , pcm , prcm , srt, beta , gamma , i , j ) ); // JQMD Elastic |
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| 379 | |
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[962] | 380 | /* |
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[819] | 381 | G4bool pauli_blocked = false; |
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[962] | 382 | if ( energetically_forbidden == false ) // result true |
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[819] | 383 | { |
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| 384 | if ( theMeanField->IsPauliBlocked ( i ) == true || theMeanField->IsPauliBlocked ( j ) == true ) |
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| 385 | { |
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| 386 | pauli_blocked = true; |
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| 387 | //std::cout << "G4QMDRESULT Collsion Pauli Blocked " << std::endl; |
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| 388 | } |
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| 389 | } |
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| 390 | else |
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| 391 | { |
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[962] | 392 | if ( theMeanField->IsPauliBlocked ( i ) == true || theMeanField->IsPauliBlocked ( j ) == true ) |
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| 393 | pauli_blocked = false; |
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[819] | 394 | //std::cout << "G4QMDRESULT Collsion Blocked " << std::endl; |
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| 395 | } |
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[962] | 396 | */ |
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[819] | 397 | |
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| 398 | /* |
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| 399 | std::cout << "G4QMDRESULT Collsion initial p4 i and j " |
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| 400 | << p4i << " " << p4j |
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| 401 | << std::endl; |
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| 402 | */ |
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[962] | 403 | // 081118 |
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| 404 | //if ( energetically_forbidden == true || pauli_blocked == true ) |
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| 405 | if ( energetically_forbidden == true ) |
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[819] | 406 | { |
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| 407 | |
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[962] | 408 | //G4cout << " energetically_forbidden " << G4endl; |
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| 409 | // Collsion not allowed then re enter orginal participants |
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| 410 | // Now only momentum, becasuse we only consider elastic scattering of nucleons |
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| 411 | |
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[819] | 412 | theSystem->GetParticipant( i )->SetMomentum( p4i.vect() ); |
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| 413 | theSystem->GetParticipant( i )->SetDefinition( pdi ); |
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| 414 | theSystem->GetParticipant( i )->SetPosition( ri ); |
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[962] | 415 | |
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[819] | 416 | theSystem->GetParticipant( j )->SetMomentum( p4j.vect() ); |
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| 417 | theSystem->GetParticipant( j )->SetDefinition( pdj ); |
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| 418 | theSystem->GetParticipant( j )->SetPosition( rj ); |
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| 419 | |
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[962] | 420 | theMeanField->Cal2BodyQuantities( i ); |
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| 421 | theMeanField->Cal2BodyQuantities( j ); |
---|
| 422 | |
---|
[819] | 423 | } |
---|
| 424 | else |
---|
| 425 | { |
---|
| 426 | |
---|
[962] | 427 | |
---|
| 428 | G4bool absorption = false; |
---|
| 429 | if ( n == theSystem->GetTotalNumberOfParticipant()+1 ) absorption = true; |
---|
| 430 | if ( absorption ) |
---|
| 431 | { |
---|
| 432 | //G4cout << "Absorption happend " << G4endl; |
---|
| 433 | i = i-1; |
---|
| 434 | n = n-1; |
---|
| 435 | } |
---|
| 436 | |
---|
| 437 | // Collsion allowed (really happened) |
---|
| 438 | |
---|
[819] | 439 | // Unset Projectile/Target flag |
---|
| 440 | theSystem->GetParticipant( i )->UnsetInitialMark(); |
---|
[962] | 441 | if ( !absorption ) theSystem->GetParticipant( j )->UnsetInitialMark(); |
---|
[819] | 442 | |
---|
[962] | 443 | theSystem->GetParticipant( i )->SetHitMark(); |
---|
| 444 | if ( !absorption ) theSystem->GetParticipant( j )->SetHitMark(); |
---|
[819] | 445 | |
---|
| 446 | theSystem->IncrementCollisionCounter(); |
---|
| 447 | |
---|
| 448 | /* |
---|
| 449 | std::cout << "G4QMDRESULT Collsion Really Happened between " |
---|
| 450 | << i << " and " << j |
---|
| 451 | << std::endl; |
---|
| 452 | std::cout << "G4QMDRESULT Collsion initial p4 i and j " |
---|
| 453 | << p4i << " " << p4j |
---|
| 454 | << std::endl; |
---|
| 455 | std::cout << "G4QMDRESULT Collsion after p4 i and j " |
---|
| 456 | << theSystem->GetParticipant( i )->Get4Momentum() |
---|
| 457 | << " " |
---|
| 458 | << theSystem->GetParticipant( j )->Get4Momentum() |
---|
| 459 | << std::endl; |
---|
| 460 | std::cout << "G4QMDRESULT Collsion Diff " |
---|
| 461 | << p4i + p4j - theSystem->GetParticipant( i )->Get4Momentum() - theSystem->GetParticipant( j )->Get4Momentum() |
---|
| 462 | << std::endl; |
---|
| 463 | std::cout << "G4QMDRESULT Collsion initial r i and j " |
---|
| 464 | << ri << " " << rj |
---|
| 465 | << std::endl; |
---|
| 466 | std::cout << "G4QMDRESULT Collsion after r i and j " |
---|
| 467 | << theSystem->GetParticipant( i )->GetPosition() |
---|
| 468 | << " " |
---|
| 469 | << theSystem->GetParticipant( j )->GetPosition() |
---|
| 470 | << std::endl; |
---|
| 471 | */ |
---|
[962] | 472 | |
---|
[819] | 473 | |
---|
| 474 | } |
---|
| 475 | |
---|
| 476 | } |
---|
| 477 | |
---|
| 478 | } |
---|
| 479 | |
---|
[962] | 480 | |
---|
[819] | 481 | } |
---|
| 482 | |
---|
| 483 | |
---|
| 484 | |
---|
| 485 | G4bool G4QMDCollision::CalFinalStateOfTheBinaryCollision( G4int i , G4int j ) |
---|
| 486 | { |
---|
| 487 | |
---|
[962] | 488 | //081103 |
---|
| 489 | //G4cout << "CalFinalStateOfTheBinaryCollision " << i << " " << j << " " << theSystem->GetTotalNumberOfParticipant() << G4endl; |
---|
[819] | 490 | |
---|
[962] | 491 | G4bool result = false; |
---|
| 492 | G4bool energyOK = false; |
---|
| 493 | G4bool pauliOK = false; |
---|
| 494 | G4bool abs = false; |
---|
| 495 | G4QMDParticipant* absorbed = NULL; |
---|
[819] | 496 | |
---|
[962] | 497 | G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum(); |
---|
| 498 | G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum(); |
---|
[819] | 499 | |
---|
| 500 | //071031 |
---|
| 501 | |
---|
| 502 | G4double epot = theMeanField->GetTotalPotential(); |
---|
| 503 | |
---|
| 504 | G4double eini = epot + p4i.e() + p4j.e(); |
---|
| 505 | |
---|
| 506 | //071031 |
---|
[962] | 507 | // will use KineticTrack |
---|
[819] | 508 | G4ParticleDefinition* pdi0 =theSystem->GetParticipant( i )->GetDefinition(); |
---|
| 509 | G4ParticleDefinition* pdj0 =theSystem->GetParticipant( j )->GetDefinition(); |
---|
[962] | 510 | G4LorentzVector p4i0 = p4i*GeV; |
---|
| 511 | G4LorentzVector p4j0 = p4j*GeV; |
---|
| 512 | G4ThreeVector ri0 = ( theSystem->GetParticipant( i )->GetPosition() )*fermi; |
---|
| 513 | G4ThreeVector rj0 = ( theSystem->GetParticipant( j )->GetPosition() )*fermi; |
---|
[819] | 514 | |
---|
| 515 | for ( G4int iitry = 0 ; iitry < 4 ; iitry++ ) |
---|
| 516 | { |
---|
| 517 | |
---|
[962] | 518 | abs = false; |
---|
| 519 | |
---|
| 520 | G4KineticTrack kt1( pdi0 , 0.0 , ri0 , p4i0 ); |
---|
| 521 | G4KineticTrack kt2( pdj0 , 0.0 , rj0 , p4j0 ); |
---|
| 522 | |
---|
[819] | 523 | G4LorentzVector p4ix_new; |
---|
| 524 | G4LorentzVector p4jx_new; |
---|
| 525 | G4KineticTrackVector* secs = NULL; |
---|
| 526 | secs = theScatterer->Scatter( kt1 , kt2 ); |
---|
| 527 | |
---|
| 528 | //std::cout << "G4QMDSCATTERER BEFORE " << kt1.GetDefinition()->GetParticleName() << " " << kt1.Get4Momentum()/GeV << " " << kt1.GetPosition()/fermi << std::endl; |
---|
| 529 | //std::cout << "G4QMDSCATTERER BEFORE " << kt2.GetDefinition()->GetParticleName() << " " << kt2.Get4Momentum()/GeV << " " << kt2.GetPosition()/fermi << std::endl; |
---|
| 530 | //std::cout << "THESCATTERER " << theScatterer->GetCrossSection ( kt1 , kt2 )/millibarn << " " << elastic << " " << sig << std::endl; |
---|
[962] | 531 | |
---|
| 532 | |
---|
[819] | 533 | if ( secs ) |
---|
| 534 | { |
---|
| 535 | G4int iti = 0; |
---|
| 536 | if ( secs->size() == 2 ) |
---|
| 537 | { |
---|
| 538 | for ( G4KineticTrackVector::iterator it |
---|
| 539 | = secs->begin() ; it != secs->end() ; it++ ) |
---|
| 540 | { |
---|
| 541 | if ( iti == 0 ) |
---|
| 542 | { |
---|
| 543 | theSystem->GetParticipant( i )->SetDefinition( (*it)->GetDefinition() ); |
---|
| 544 | p4ix_new = (*it)->Get4Momentum()/GeV; |
---|
| 545 | //std::cout << "THESCATTERER " << (*it)->GetDefinition()->GetParticleName() << std::endl; |
---|
| 546 | theSystem->GetParticipant( i )->SetMomentum( p4ix_new.v() ); |
---|
| 547 | } |
---|
| 548 | if ( iti == 1 ) |
---|
| 549 | { |
---|
| 550 | theSystem->GetParticipant( j )->SetDefinition( (*it)->GetDefinition() ); |
---|
| 551 | p4jx_new = (*it)->Get4Momentum()/GeV; |
---|
| 552 | //std::cout << "THESCATTERER " << p4jx_new.e()-p4jx_new.m() << std::endl; |
---|
| 553 | theSystem->GetParticipant( j )->SetMomentum( p4jx_new.v() ); |
---|
| 554 | } |
---|
| 555 | //std::cout << "G4QMDSCATTERER AFTER " << (*it)->GetDefinition()->GetParticleName() << " " << (*it)->Get4Momentum()/GeV << std::endl; |
---|
| 556 | iti++; |
---|
| 557 | } |
---|
| 558 | } |
---|
[962] | 559 | else if ( secs->size() == 1 ) |
---|
[819] | 560 | { |
---|
[962] | 561 | //081118 |
---|
| 562 | abs = true; |
---|
| 563 | //G4cout << "G4QMDCollision pion absrorption " << secs->front()->GetDefinition()->GetParticleName() << G4endl; |
---|
[819] | 564 | //secs->front()->Decay(); |
---|
| 565 | theSystem->GetParticipant( i )->SetDefinition( secs->front()->GetDefinition() ); |
---|
| 566 | p4ix_new = secs->front()->Get4Momentum()/GeV; |
---|
| 567 | theSystem->GetParticipant( i )->SetMomentum( p4ix_new.v() ); |
---|
| 568 | |
---|
| 569 | } |
---|
| 570 | |
---|
[962] | 571 | //081118 |
---|
| 572 | if ( secs->size() > 2 ) |
---|
| 573 | { |
---|
[819] | 574 | |
---|
[962] | 575 | G4cout << "G4QMDCollision secs size > 2; " << secs->size() << G4endl; |
---|
| 576 | |
---|
| 577 | for ( G4KineticTrackVector::iterator it |
---|
| 578 | = secs->begin() ; it != secs->end() ; it++ ) |
---|
| 579 | { |
---|
| 580 | G4cout << "G4QMDSCATTERER AFTER " << (*it)->GetDefinition()->GetParticleName() << " " << (*it)->Get4Momentum()/GeV << G4endl; |
---|
| 581 | } |
---|
| 582 | |
---|
| 583 | } |
---|
| 584 | |
---|
[819] | 585 | // deleteing KineticTrack |
---|
| 586 | for ( G4KineticTrackVector::iterator it |
---|
| 587 | = secs->begin() ; it != secs->end() ; it++ ) |
---|
| 588 | { |
---|
| 589 | delete *it; |
---|
| 590 | } |
---|
[962] | 591 | |
---|
| 592 | delete secs; |
---|
[819] | 593 | } |
---|
| 594 | //071031 |
---|
| 595 | |
---|
[962] | 596 | if ( !abs ) |
---|
| 597 | { |
---|
| 598 | theMeanField->Cal2BodyQuantities( i ); |
---|
| 599 | theMeanField->Cal2BodyQuantities( j ); |
---|
| 600 | } |
---|
| 601 | else |
---|
| 602 | { |
---|
| 603 | absorbed = theSystem->EraseParticipant( j ); |
---|
| 604 | theMeanField->Update(); |
---|
| 605 | } |
---|
[819] | 606 | |
---|
| 607 | epot = theMeanField->GetTotalPotential(); |
---|
| 608 | |
---|
| 609 | G4double efin = epot + p4ix_new.e() + p4jx_new.e(); |
---|
| 610 | |
---|
| 611 | //std::cout << "Collision NEW epot " << i << " " << j << " " << epot << " " << std::abs ( eini - efin ) - epse << std::endl; |
---|
| 612 | |
---|
| 613 | /* |
---|
| 614 | std::cout << "Collision efin " << i << " " << j << " " << efin << std::endl; |
---|
| 615 | std::cout << "Collision " << i << " " << j << " " << std::abs ( eini - efin ) << " " << epse << std::endl; |
---|
| 616 | std::cout << "Collision " << std::abs ( eini - efin ) << " " << epse << std::endl; |
---|
| 617 | */ |
---|
| 618 | |
---|
| 619 | //071031 |
---|
| 620 | if ( std::abs ( eini - efin ) < epse ) |
---|
| 621 | { |
---|
| 622 | // Collison OK |
---|
| 623 | //std::cout << "collisions6" << std::endl; |
---|
| 624 | //std::cout << "collisions before " << p4i << " " << p4j << std::endl; |
---|
| 625 | //std::cout << "collisions after " << theSystem->GetParticipant( i )->Get4Momentum() << " " << theSystem->GetParticipant( j )->Get4Momentum() << std::endl; |
---|
| 626 | //std::cout << "collisions dif " << ( p4i + p4j ) - ( theSystem->GetParticipant( i )->Get4Momentum() + theSystem->GetParticipant( j )->Get4Momentum() ) << std::endl; |
---|
[962] | 627 | //std::cout << "collisions before " << ri0/fermi << " " << rj0/fermi << std::endl; |
---|
[819] | 628 | //std::cout << "collisions after " << theSystem->GetParticipant( i )->GetPosition() << " " << theSystem->GetParticipant( j )->GetPosition() << std::endl; |
---|
[962] | 629 | energyOK = true; |
---|
| 630 | break; |
---|
[819] | 631 | } |
---|
[962] | 632 | else |
---|
| 633 | { |
---|
| 634 | //G4cout << "Energy Not OK " << G4endl; |
---|
| 635 | if ( abs ) |
---|
| 636 | { |
---|
| 637 | //G4cout << "TKDB reinsert j " << G4endl; |
---|
| 638 | theSystem->InsertParticipant( absorbed , j ); |
---|
| 639 | theMeanField->Update(); |
---|
| 640 | } |
---|
| 641 | // do not need reinsert in no absroption case |
---|
| 642 | } |
---|
[819] | 643 | //071031 |
---|
[962] | 644 | } |
---|
[819] | 645 | |
---|
[962] | 646 | // Energetically forbidden collision |
---|
[819] | 647 | |
---|
[962] | 648 | if ( energyOK ) |
---|
| 649 | { |
---|
| 650 | // Pauli Check |
---|
| 651 | //G4cout << "Pauli Checking " << theSystem->GetTotalNumberOfParticipant() << G4endl; |
---|
| 652 | if ( !abs ) |
---|
| 653 | { |
---|
| 654 | if ( !( theMeanField->IsPauliBlocked ( i ) == true || theMeanField->IsPauliBlocked ( j ) == true ) ) |
---|
| 655 | { |
---|
| 656 | //G4cout << "Binary Collision Happen " << theSystem->GetTotalNumberOfParticipant() << G4endl; |
---|
| 657 | pauliOK = true; |
---|
| 658 | } |
---|
| 659 | } |
---|
| 660 | else |
---|
| 661 | { |
---|
| 662 | if ( theMeanField->IsPauliBlocked ( i ) == false ) |
---|
| 663 | { |
---|
| 664 | //G4cout << "Absorption Happen " << theSystem->GetTotalNumberOfParticipant() << G4endl; |
---|
| 665 | delete absorbed; |
---|
| 666 | pauliOK = true; |
---|
| 667 | } |
---|
| 668 | } |
---|
| 669 | |
---|
| 670 | |
---|
| 671 | if ( pauliOK ) |
---|
| 672 | { |
---|
| 673 | result = true; |
---|
| 674 | } |
---|
| 675 | else |
---|
| 676 | { |
---|
| 677 | //G4cout << "Pauli Blocked" << G4endl; |
---|
| 678 | if ( abs ) |
---|
| 679 | { |
---|
| 680 | //G4cout << "TKDB reinsert j pauli block" << G4endl; |
---|
| 681 | theSystem->InsertParticipant( absorbed , j ); |
---|
| 682 | theMeanField->Update(); |
---|
| 683 | } |
---|
| 684 | } |
---|
[819] | 685 | } |
---|
| 686 | |
---|
[962] | 687 | return result; |
---|
[819] | 688 | |
---|
| 689 | } |
---|
| 690 | |
---|
| 691 | |
---|
| 692 | |
---|
| 693 | G4bool G4QMDCollision::CalFinalStateOfTheBinaryCollisionJQMD( G4double sig , G4double cutoff , G4ThreeVector pcm , G4double prcm , G4double srt , G4ThreeVector beta , G4double gamma , G4int i , G4int j ) |
---|
| 694 | { |
---|
| 695 | |
---|
| 696 | //G4cout << "CalFinalStateOfTheBinaryCollisionJQMD" << G4endl; |
---|
| 697 | |
---|
| 698 | G4bool result = true; |
---|
| 699 | |
---|
| 700 | G4LorentzVector p4i = theSystem->GetParticipant( i )->Get4Momentum(); |
---|
| 701 | G4double rmi = theSystem->GetParticipant( i )->GetMass(); |
---|
| 702 | G4int zi = theSystem->GetParticipant( i )->GetChargeInUnitOfEplus(); |
---|
| 703 | |
---|
| 704 | G4LorentzVector p4j = theSystem->GetParticipant( j )->Get4Momentum(); |
---|
| 705 | G4double rmj = theSystem->GetParticipant( j )->GetMass(); |
---|
| 706 | G4int zj = theSystem->GetParticipant( j )->GetChargeInUnitOfEplus(); |
---|
| 707 | |
---|
| 708 | G4double pr = prcm; |
---|
| 709 | |
---|
| 710 | G4double c2 = pcm.z()/pr; |
---|
| 711 | |
---|
| 712 | G4double csrt = srt - cutoff; |
---|
| 713 | |
---|
| 714 | //G4double pri = prcm; |
---|
| 715 | //G4double prf = sqrt ( 0.25 * srt*srt -rm2 ); |
---|
| 716 | |
---|
| 717 | G4double asrt = srt - rmi - rmj; |
---|
| 718 | G4double pra = prcm; |
---|
| 719 | |
---|
| 720 | |
---|
| 721 | |
---|
| 722 | G4double elastic = 0.0; |
---|
| 723 | |
---|
| 724 | if ( zi == zj ) |
---|
| 725 | { |
---|
| 726 | if ( csrt < 0.4286 ) |
---|
| 727 | { |
---|
| 728 | elastic = 35.0 / ( 1. + csrt * 100.0 ) + 20.0; |
---|
| 729 | } |
---|
| 730 | else |
---|
| 731 | { |
---|
| 732 | elastic = ( - std::atan( ( csrt - 0.4286 ) * 1.5 - 0.8 ) |
---|
| 733 | * 2. / pi + 1.0 ) * 9.65 + 7.0; |
---|
| 734 | } |
---|
| 735 | } |
---|
| 736 | else |
---|
| 737 | { |
---|
| 738 | if ( csrt < 0.4286 ) |
---|
| 739 | { |
---|
| 740 | elastic = 28.0 / ( 1. + csrt * 100.0 ) + 27.0; |
---|
| 741 | } |
---|
| 742 | else |
---|
| 743 | { |
---|
| 744 | elastic = ( - std::atan( ( csrt - 0.4286 ) * 1.5 - 0.8 ) |
---|
| 745 | * 2. / pi + 1.0 ) * 12.34 + 10.0; |
---|
| 746 | } |
---|
| 747 | } |
---|
| 748 | |
---|
| 749 | // std::cout << "Collision csrt " << i << " " << j << " " << csrt << std::endl; |
---|
| 750 | // std::cout << "Collision elstic " << i << " " << j << " " << elastic << std::endl; |
---|
| 751 | |
---|
| 752 | |
---|
| 753 | // std::cout << "Collision sig " << i << " " << j << " " << sig << std::endl; |
---|
| 754 | if ( G4UniformRand() > elastic / sig ) |
---|
| 755 | { |
---|
| 756 | //std::cout << "Inelastic " << std::endl; |
---|
| 757 | //std::cout << "elastic/sig " << elastic/sig << std::endl; |
---|
| 758 | return result; |
---|
| 759 | } |
---|
| 760 | else |
---|
| 761 | { |
---|
| 762 | //std::cout << "Elastic " << std::endl; |
---|
| 763 | } |
---|
| 764 | // std::cout << "Collision ELSTIC " << i << " " << j << std::endl; |
---|
| 765 | |
---|
| 766 | |
---|
| 767 | G4double as = std::pow ( 3.65 * asrt , 6 ); |
---|
| 768 | G4double a = 6.0 * as / (1.0 + as); |
---|
| 769 | G4double ta = -2.0 * pra*pra; |
---|
| 770 | G4double x = G4UniformRand(); |
---|
| 771 | G4double t1 = std::log( (1-x) * std::exp(2.*a*ta) + x ) / a; |
---|
| 772 | G4double c1 = 1.0 - t1/ta; |
---|
| 773 | |
---|
| 774 | if( std::abs(c1) > 1.0 ) c1 = 2.0 * x - 1.0; |
---|
| 775 | |
---|
| 776 | /* |
---|
| 777 | std::cout << "Collision as " << i << " " << j << " " << as << std::endl; |
---|
| 778 | std::cout << "Collision a " << i << " " << j << " " << a << std::endl; |
---|
| 779 | std::cout << "Collision ta " << i << " " << j << " " << ta << std::endl; |
---|
| 780 | std::cout << "Collision x " << i << " " << j << " " << x << std::endl; |
---|
| 781 | std::cout << "Collision t1 " << i << " " << j << " " << t1 << std::endl; |
---|
| 782 | std::cout << "Collision c1 " << i << " " << j << " " << c1 << std::endl; |
---|
| 783 | */ |
---|
| 784 | t1 = 2.0*pi*G4UniformRand(); |
---|
| 785 | // std::cout << "Collision t1 " << i << " " << j << " " << t1 << std::endl; |
---|
| 786 | G4double t2 = 0.0; |
---|
| 787 | if ( pcm.x() == 0.0 && pcm.y() == 0 ) |
---|
| 788 | { |
---|
| 789 | t2 = 0.0; |
---|
| 790 | } |
---|
| 791 | else |
---|
| 792 | { |
---|
| 793 | t2 = std::atan2( pcm.y() , pcm.x() ); |
---|
| 794 | } |
---|
| 795 | // std::cout << "Collision t2 " << i << " " << j << " " << t2 << std::endl; |
---|
| 796 | |
---|
| 797 | G4double s1 = std::sqrt ( 1.0 - c1*c1 ); |
---|
| 798 | G4double s2 = std::sqrt ( 1.0 - c2*c2 ); |
---|
| 799 | |
---|
| 800 | G4double ct1 = std::cos(t1); |
---|
| 801 | G4double st1 = std::sin(t1); |
---|
| 802 | |
---|
| 803 | G4double ct2 = std::cos(t2); |
---|
| 804 | G4double st2 = std::sin(t2); |
---|
| 805 | |
---|
| 806 | G4double ss = c2*s1*ct1 + s2*c1; |
---|
| 807 | |
---|
| 808 | pcm.setX( pr * ( ss*ct2 - s1*st1*st2) ); |
---|
| 809 | pcm.setY( pr * ( ss*st2 + s1*st1*ct2) ); |
---|
| 810 | pcm.setZ( pr * ( c1*c2 - s1*s2*ct1) ); |
---|
| 811 | |
---|
| 812 | // std::cout << "Collision pcm " << i << " " << j << " " << pcm << std::endl; |
---|
| 813 | |
---|
| 814 | G4double epot = theMeanField->GetTotalPotential(); |
---|
| 815 | |
---|
| 816 | G4double eini = epot + p4i.e() + p4j.e(); |
---|
| 817 | G4double etwo = p4i.e() + p4j.e(); |
---|
| 818 | |
---|
| 819 | /* |
---|
| 820 | std::cout << "Collision epot " << i << " " << j << " " << epot << std::endl; |
---|
| 821 | std::cout << "Collision eini " << i << " " << j << " " << eini << std::endl; |
---|
| 822 | std::cout << "Collision etwo " << i << " " << j << " " << etwo << std::endl; |
---|
| 823 | */ |
---|
| 824 | |
---|
| 825 | |
---|
| 826 | for ( G4int itry = 0 ; itry < 4 ; itry++ ) |
---|
| 827 | { |
---|
| 828 | |
---|
| 829 | G4double eicm = std::sqrt ( rmi*rmi + pcm*pcm ); |
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| 830 | G4double pibeta = pcm*beta; |
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| 831 | |
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| 832 | G4double trans = gamma * ( gamma * pibeta / ( gamma + 1 ) + eicm ); |
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| 833 | |
---|
| 834 | G4ThreeVector pi_new = beta*trans + pcm; |
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| 835 | |
---|
| 836 | G4double ejcm = std::sqrt ( rmj*rmj + pcm*pcm ); |
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| 837 | trans = gamma * ( gamma * pibeta / ( gamma + 1 ) + ejcm ); |
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| 838 | |
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| 839 | G4ThreeVector pj_new = beta*trans - pcm; |
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| 840 | |
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| 841 | // |
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| 842 | // Delete old |
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| 843 | // Add new Particitipants |
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| 844 | // |
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| 845 | // Now only change momentum ( Beacuse we only have elastic sctter of nucleon |
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| 846 | // In future Definition also will be change |
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| 847 | // |
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| 848 | |
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| 849 | theSystem->GetParticipant( i )->SetMomentum( pi_new ); |
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| 850 | theSystem->GetParticipant( j )->SetMomentum( pj_new ); |
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| 851 | |
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| 852 | G4double pi_new_e = (theSystem->GetParticipant( i )->Get4Momentum()).e(); |
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| 853 | G4double pj_new_e = (theSystem->GetParticipant( j )->Get4Momentum()).e(); |
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| 854 | |
---|
| 855 | theMeanField->Cal2BodyQuantities( i ); |
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| 856 | theMeanField->Cal2BodyQuantities( j ); |
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| 857 | |
---|
| 858 | epot = theMeanField->GetTotalPotential(); |
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| 859 | |
---|
| 860 | G4double efin = epot + pi_new_e + pj_new_e ; |
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| 861 | |
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| 862 | //std::cout << "Collision NEW epot " << i << " " << j << " " << epot << " " << std::abs ( eini - efin ) - epse << std::endl; |
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| 863 | /* |
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| 864 | std::cout << "Collision efin " << i << " " << j << " " << efin << std::endl; |
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| 865 | std::cout << "Collision " << i << " " << j << " " << std::abs ( eini - efin ) << " " << epse << std::endl; |
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| 866 | std::cout << "Collision " << std::abs ( eini - efin ) << " " << epse << std::endl; |
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| 867 | */ |
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| 868 | |
---|
| 869 | //071031 |
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| 870 | if ( std::abs ( eini - efin ) < epse ) |
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| 871 | { |
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| 872 | // Collison OK |
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| 873 | //std::cout << "collisions6" << std::endl; |
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| 874 | //std::cout << "collisions before " << p4i << " " << p4j << std::endl; |
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| 875 | //std::cout << "collisions after " << theSystem->GetParticipant( i )->Get4Momentum() << " " << theSystem->GetParticipant( j )->Get4Momentum() << std::endl; |
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| 876 | //std::cout << "collisions dif " << ( p4i + p4j ) - ( theSystem->GetParticipant( i )->Get4Momentum() + theSystem->GetParticipant( j )->Get4Momentum() ) << std::endl; |
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| 877 | //std::cout << "collisions before " << rix/fermi << " " << rjx/fermi << std::endl; |
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| 878 | //std::cout << "collisions after " << theSystem->GetParticipant( i )->GetPosition() << " " << theSystem->GetParticipant( j )->GetPosition() << std::endl; |
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| 879 | } |
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| 880 | //071031 |
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| 881 | |
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| 882 | if ( std::abs ( eini - efin ) < epse ) return result; // Collison OK |
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| 883 | |
---|
| 884 | G4double cona = ( eini - efin + etwo ) / gamma; |
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| 885 | G4double fac2 = 1.0 / ( 4.0 * cona*cona * pr*pr ) * |
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| 886 | ( ( cona*cona - ( rmi*rmi + rmj*rmj ) )*( cona*cona - ( rmi*rmi + rmj*rmj ) ) |
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| 887 | - 4.0 * rmi*rmi * rmj*rmj ); |
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| 888 | |
---|
| 889 | if ( fac2 > 0 ) |
---|
| 890 | { |
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| 891 | G4double fact = std::sqrt ( fac2 ); |
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| 892 | pcm = fact*pcm; |
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| 893 | } |
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| 894 | |
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| 895 | |
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| 896 | } |
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| 897 | |
---|
| 898 | // Energetically forbidden collision |
---|
| 899 | result = false; |
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| 900 | |
---|
| 901 | return result; |
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| 902 | |
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| 903 | } |
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