[968] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | //080721 Create adjust_final_state method by T. Koi |
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| 28 | //080801 Residual reconstruction with theNDLDataA,Z (A, Z, and momentum are adjusted) by T. Koi |
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| 29 | |
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| 30 | #include "G4NeutronHPFinalState.hh" |
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| 31 | |
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| 32 | #include "G4ParticleTable.hh" |
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| 33 | #include "G4Gamma.hh" |
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| 34 | |
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| 35 | |
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| 36 | |
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| 37 | void G4NeutronHPFinalState::adjust_final_state ( G4LorentzVector init_4p_lab ) |
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| 38 | { |
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| 39 | |
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| 40 | if ( adjustResult != true ) return; |
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| 41 | |
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| 42 | G4int nSecondaries = theResult.GetNumberOfSecondaries(); |
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| 43 | |
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| 44 | G4int sum_Z = 0; |
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| 45 | G4int sum_A = 0; |
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| 46 | G4int max_SecZ = 0; |
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| 47 | G4int max_SecA = 0; |
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| 48 | for ( int i = 0 ; i < nSecondaries ; i++ ) |
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| 49 | { |
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| 50 | sum_Z += theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber(); |
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| 51 | max_SecZ = std::max ( max_SecZ , theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber() ); |
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| 52 | sum_A += theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass(); |
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| 53 | max_SecA = std::max ( max_SecA , theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass() ); |
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| 54 | } |
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| 55 | |
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| 56 | G4ParticleDefinition* resi_pd = NULL; |
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| 57 | if ( (int)(theBaseZ - sum_Z) == 0 && (int)(theBaseA + 1 - sum_A) == 0 ) |
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| 58 | resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ , max_SecA , 0.0 ); |
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| 59 | else |
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| 60 | { |
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| 61 | resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( int(theBaseZ - sum_Z) , (int)(theBaseA + 1 - sum_A) , 0.0 ); |
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| 62 | if ( resi_pd == NULL ) |
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| 63 | { |
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| 64 | // theNDLDataZ,A has the Z and A of used NDL file |
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| 65 | if ( (int)(theNDLDataZ - sum_Z) == 0 && (int)(theNDLDataA + 1 - sum_A) == 0 ) |
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| 66 | { |
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| 67 | G4int dif_Z = ( int ) ( theNDLDataZ - theBaseZ ); |
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| 68 | G4int dif_A = ( int ) ( theNDLDataA - theBaseA ); |
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| 69 | resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ - dif_Z , max_SecA - dif_A , 0.0 ); |
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| 70 | for ( int i = 0 ; i < nSecondaries ; i++ ) |
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| 71 | { |
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| 72 | if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber() == max_SecZ |
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| 73 | && theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass() == max_SecA ) |
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| 74 | { |
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| 75 | G4ThreeVector p = theResult.GetSecondary( i )->GetParticle()->GetMomentum(); |
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| 76 | p = p * resi_pd->GetPDGMass()/ G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ , max_SecA , 0.0 )->GetPDGMass(); |
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| 77 | theResult.GetSecondary( i )->GetParticle()->SetDefinition( resi_pd ); |
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| 78 | theResult.GetSecondary( i )->GetParticle()->SetMomentum( p ); |
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| 79 | } |
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| 80 | } |
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| 81 | } |
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| 82 | } |
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| 83 | } |
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| 84 | |
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| 85 | |
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| 86 | G4LorentzVector secs_4p_lab( 0.0 ); |
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| 87 | |
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| 88 | G4int n_sec = theResult.GetNumberOfSecondaries(); |
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| 89 | G4double fast = 0; |
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| 90 | G4double slow = 1; |
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| 91 | G4int ifast = 0; |
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| 92 | G4int islow = 0; |
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| 93 | G4int ires = -1; |
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| 94 | |
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| 95 | for ( G4int i = 0 ; i < n_sec ; i++ ) |
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| 96 | { |
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| 97 | |
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| 98 | //G4cout << "HP_DB " << i |
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| 99 | // << " " << theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetParticleName() |
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| 100 | // << " 4p " << theResult.GetSecondary( i )->GetParticle()->Get4Momentum() |
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| 101 | // << " ke " << theResult.GetSecondary( i )->GetParticle()->Get4Momentum().e() - theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetPDGMass() |
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| 102 | // << G4endl; |
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| 103 | |
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| 104 | secs_4p_lab += theResult.GetSecondary( i )->GetParticle()->Get4Momentum(); |
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| 105 | |
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| 106 | G4double beta = 0; |
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| 107 | if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition() != G4Gamma::Gamma() ) |
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| 108 | { |
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| 109 | beta = theResult.GetSecondary( i )->GetParticle()->Get4Momentum().beta(); |
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| 110 | } |
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| 111 | else |
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| 112 | { |
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| 113 | beta = 1; |
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| 114 | } |
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| 115 | |
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| 116 | if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition() == resi_pd ) ires = i; |
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| 117 | |
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| 118 | if ( slow > beta && beta != 0 ) |
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| 119 | { |
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| 120 | slow = beta; |
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| 121 | islow = i; |
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| 122 | } |
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| 123 | |
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| 124 | if ( fast <= beta ) |
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| 125 | { |
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| 126 | if ( fast != 1 ) |
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| 127 | { |
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| 128 | fast = beta; |
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| 129 | ifast = i; |
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| 130 | } |
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| 131 | else |
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| 132 | { |
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| 133 | // fast is already photon then check E |
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| 134 | G4double e = theResult.GetSecondary( i )->GetParticle()->Get4Momentum().e(); |
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| 135 | if ( e > theResult.GetSecondary( ifast )->GetParticle()->Get4Momentum().e() ) |
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| 136 | { |
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| 137 | // among photons, the highest E becomes the fastest |
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| 138 | ifast = i; |
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| 139 | } |
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| 140 | } |
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| 141 | } |
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| 142 | } |
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| 143 | |
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| 144 | |
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| 145 | G4LorentzVector dif_4p = init_4p_lab - secs_4p_lab; |
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| 146 | |
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| 147 | //G4cout << "HP_DB dif_4p " << init_4p_lab - secs_4p_lab << G4endl; |
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| 148 | //G4cout << "HP_DB dif_3p mag " << ( dif_4p.v() ).mag() << G4endl; |
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| 149 | //G4cout << "HP_DB dif_e " << dif_4p.e() - ( dif_4p.v() ).mag()<< G4endl; |
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| 150 | |
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| 151 | G4LorentzVector p4(0); |
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| 152 | if ( ires == -1 ) |
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| 153 | { |
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| 154 | // Create and Add Residual Nucleus |
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| 155 | ires = nSecondaries; |
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| 156 | nSecondaries += 1; |
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| 157 | |
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| 158 | G4DynamicParticle* res = new G4DynamicParticle ( resi_pd , dif_4p.v() ); |
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| 159 | theResult.AddSecondary ( res ); |
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| 160 | |
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| 161 | p4 = res->Get4Momentum(); |
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| 162 | if ( slow > p4.beta() ) |
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| 163 | { |
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| 164 | slow = p4.beta(); |
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| 165 | islow = ires; |
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| 166 | } |
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| 167 | |
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| 168 | dif_4p = init_4p_lab - ( secs_4p_lab + p4 ); |
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| 169 | } |
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| 170 | |
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| 171 | //Which is bigger dif_p or dif_e |
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| 172 | |
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| 173 | if ( dif_4p.v().mag() < std::abs( dif_4p.e() ) ) |
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| 174 | { |
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| 175 | |
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| 176 | // Adjust p |
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| 177 | if ( dif_4p.v().mag() < 1*MeV ) |
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| 178 | { |
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| 179 | |
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| 180 | nSecondaries += 1; |
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| 181 | theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , dif_4p.v() ) ); |
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| 182 | |
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| 183 | } |
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| 184 | else |
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| 185 | { |
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| 186 | //G4cout << "HP_DB Difference in dif_p is too large (>1MeV) to adjust, so that give up tuning" << G4endl; |
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| 187 | } |
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| 188 | |
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| 189 | } |
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| 190 | else |
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| 191 | { |
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| 192 | |
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| 193 | // dif_p > dif_e |
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| 194 | // at first momentum |
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| 195 | // Move residual momentum |
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| 196 | |
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| 197 | p4 = theResult.GetSecondary( ires )->GetParticle()->Get4Momentum(); |
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| 198 | theResult.GetSecondary( ires )->GetParticle()->SetMomentum( p4.v() + dif_4p.v() ); |
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| 199 | dif_4p = init_4p_lab - ( secs_4p_lab - p4 + theResult.GetSecondary( ires )->GetParticle()->Get4Momentum() ); |
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| 200 | |
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| 201 | //G4cout << "HP_DB new residual kinetic energy " << theResult.GetSecondary( ires )->GetParticle()->GetKineticEnergy() << G4endl; |
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| 202 | |
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| 203 | } |
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| 204 | |
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| 205 | G4double dif_e = dif_4p.e() - ( dif_4p.v() ).mag(); |
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| 206 | //G4cout << "HP_DB dif_e " << dif_e << G4endl; |
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| 207 | |
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| 208 | if ( dif_e > 0 ) |
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| 209 | { |
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| 210 | |
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| 211 | // create 2 gamma |
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| 212 | |
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| 213 | nSecondaries += 2; |
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| 214 | G4double e1 = ( dif_4p.e() -dif_4p.v().mag() ) / 2; |
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| 215 | G4double costh = 2.*G4UniformRand()-1.; |
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| 216 | G4double phi = twopi*G4UniformRand(); |
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| 217 | G4ThreeVector dir( std::sin(std::acos(costh))*std::cos(phi), |
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| 218 | std::sin(std::acos(costh))*std::sin(phi), |
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| 219 | costh); |
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| 220 | theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , e1*dir ) ); |
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| 221 | theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , -e1*dir ) ); |
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| 222 | |
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| 223 | } |
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| 224 | else //dif_e < 0 |
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| 225 | { |
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| 226 | |
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| 227 | // At first reduce KE of the fastest secondary; |
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| 228 | G4double ke0 = theResult.GetSecondary( ifast )->GetParticle()->GetKineticEnergy(); |
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| 229 | G4ThreeVector p0 = theResult.GetSecondary( ifast )->GetParticle()->GetMomentum(); |
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| 230 | G4ThreeVector dir = ( theResult.GetSecondary( ifast )->GetParticle()->GetMomentum() ).unit(); |
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| 231 | |
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| 232 | //G4cout << "HP_DB ifast " << ifast << " ke0 " << ke0 << G4endl; |
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| 233 | |
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| 234 | if ( ke0 + dif_e > 0 ) |
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| 235 | { |
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| 236 | theResult.GetSecondary( ifast )->GetParticle()->SetKineticEnergy( ke0 + dif_e ); |
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| 237 | G4ThreeVector dp = p0 - theResult.GetSecondary( ifast )->GetParticle()->GetMomentum(); |
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| 238 | |
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| 239 | G4ThreeVector p = theResult.GetSecondary( islow )->GetParticle()->GetMomentum(); |
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| 240 | //theResult.GetSecondary( islow )->GetParticle()->SetMomentum( p - dif_e*dir ); |
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| 241 | theResult.GetSecondary( islow )->GetParticle()->SetMomentum( p + dp ); |
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| 242 | } |
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| 243 | else |
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| 244 | { |
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| 245 | //G4cout << "HP_DB Difference in dif_e too large ( <0MeV ) to adjust, so that give up tuning" << G4endl; |
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| 246 | } |
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| 247 | |
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| 248 | } |
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| 249 | |
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| 250 | } |
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