[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 | // File name: G4PiMinusStopAbsorption |
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| 27 | // |
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| 28 | // Author: Maria Grazia Pia (pia@genova.infn.it) |
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| 29 | // |
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| 30 | // Creation date: 8 May 1998 |
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| 31 | // |
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| 32 | // ------------------------------------------------------------------- |
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| 33 | |
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| 34 | |
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| 35 | #include "G4PiMinusStopAbsorption.hh" |
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| 36 | #include <vector> |
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| 37 | |
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| 38 | #include "globals.hh" |
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| 39 | #include "Randomize.hh" |
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| 40 | #include "G4NucleiPropertiesTable.hh" |
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| 41 | #include "G4NucleiProperties.hh" |
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| 42 | #include "G4ParticleTypes.hh" |
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| 43 | #include "G4Nucleus.hh" |
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| 44 | #include "G4ReactionKinematics.hh" |
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| 45 | #include "G4DynamicParticleVector.hh" |
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| 46 | #include "G4ParticleDefinition.hh" |
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| 47 | #include "G4Proton.hh" |
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| 48 | #include "G4Neutron.hh" |
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| 49 | #include "G4ThreeVector.hh" |
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| 50 | |
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| 51 | // Constructor |
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| 52 | |
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| 53 | G4PiMinusStopAbsorption::G4PiMinusStopAbsorption(G4PiMinusStopMaterial* materialAlgo, |
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| 54 | const G4double Z, const G4double A) |
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| 55 | |
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| 56 | { |
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| 57 | _materialAlgo = materialAlgo; |
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| 58 | _nucleusZ = Z; |
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| 59 | _nucleusA = A; |
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| 60 | _level = 0; |
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| 61 | _absorptionProducts = new G4DynamicParticleVector(); |
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| 62 | } |
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| 63 | |
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| 64 | // Destructor |
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| 65 | |
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| 66 | G4PiMinusStopAbsorption::~G4PiMinusStopAbsorption() |
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| 67 | { |
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| 68 | // Memory management of materialAlgo needs better thought (MGP) |
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| 69 | delete _materialAlgo; |
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| 70 | // Who owns it? Memory management is not clear... (MGP) |
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| 71 | // _absorptionProducts->clearAndDestroy(); |
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| 72 | delete _absorptionProducts; |
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| 73 | } |
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| 74 | |
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| 75 | G4DynamicParticleVector* G4PiMinusStopAbsorption::DoAbsorption() |
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| 76 | { |
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| 77 | std::vector<G4ParticleDefinition*>* defNucleons = _materialAlgo->DefinitionVector(); |
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| 78 | |
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| 79 | G4double newA = _nucleusA; |
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| 80 | G4double newZ = _nucleusZ; |
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| 81 | |
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| 82 | if (defNucleons != 0) |
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| 83 | { |
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| 84 | for (unsigned int i=0; i<defNucleons->size(); i++) |
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| 85 | { |
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| 86 | if ( (*defNucleons)[i] == G4Proton::Proton()) |
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| 87 | { |
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| 88 | newA = newA - 1; |
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| 89 | newZ = newZ - 1; |
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| 90 | } |
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| 91 | if ((*defNucleons)[i] == G4Neutron::Neutron()) |
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| 92 | { newA = newA - 1; } |
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| 93 | } |
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| 94 | } |
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| 95 | |
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| 96 | G4double binding = G4NucleiPropertiesTable::GetBindingEnergy(static_cast<G4int>(_nucleusZ) ,static_cast<G4int>(_nucleusA)) / _nucleusA; |
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| 97 | G4double mass = G4NucleiProperties::GetNuclearMass(static_cast<G4int>(newA),static_cast<G4int>(newZ)); |
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| 98 | |
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| 99 | |
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| 100 | std::vector<G4LorentzVector*>* p4Nucleons = _materialAlgo->P4Vector(binding,mass); |
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| 101 | |
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| 102 | if (defNucleons != 0 && p4Nucleons != 0) |
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| 103 | { |
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| 104 | unsigned int nNucleons = p4Nucleons->size(); |
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| 105 | |
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| 106 | G4double seen = _materialAlgo->FinalNucleons() / 2.; |
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| 107 | G4int maxN = nNucleons; |
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| 108 | if (defNucleons->size() < nNucleons) { maxN = defNucleons->size(); } |
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| 109 | |
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| 110 | for (G4int i=0; i<maxN; i++) |
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| 111 | { |
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| 112 | G4DynamicParticle* product; |
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| 113 | if ((*defNucleons)[i] == G4Proton::Proton()) |
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| 114 | { product = new G4DynamicParticle(G4Proton::Proton(),*((*p4Nucleons)[i])); } |
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| 115 | else |
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| 116 | { product = new G4DynamicParticle(G4Neutron::Neutron(),*((*p4Nucleons)[i])); } |
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| 117 | G4double ranflat = G4UniformRand(); |
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| 118 | |
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| 119 | if (ranflat < seen) |
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| 120 | { _absorptionProducts->push_back(product); } |
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| 121 | else |
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| 122 | { delete product; } |
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| 123 | } |
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| 124 | } |
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| 125 | |
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| 126 | return _absorptionProducts; |
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| 127 | |
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| 128 | } |
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| 129 | |
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| 130 | G4ThreeVector G4PiMinusStopAbsorption::RecoilMomentum() |
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| 131 | { |
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| 132 | G4ThreeVector pProducts(0.,0.,0.); |
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| 133 | |
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| 134 | for (unsigned int i = 0; i< _absorptionProducts->size(); i++) |
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| 135 | { |
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| 136 | pProducts = pProducts + (*_absorptionProducts)[i]->GetMomentum(); |
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| 137 | } |
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| 138 | return pProducts; |
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| 139 | } |
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| 140 | |
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| 141 | |
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| 142 | G4int G4PiMinusStopAbsorption::NProtons() |
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| 143 | { |
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| 144 | G4int n = 0; |
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| 145 | G4int entries = _absorptionProducts->size(); |
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| 146 | for (int i = 0; i<entries; i++) |
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| 147 | { |
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| 148 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Proton::Proton()) |
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| 149 | { n = n + 1; } |
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| 150 | } |
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| 151 | return n; |
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| 152 | } |
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| 153 | |
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| 154 | |
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| 155 | G4int G4PiMinusStopAbsorption::NNeutrons() |
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| 156 | { |
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| 157 | G4int n = 0; |
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| 158 | G4int entries = _absorptionProducts->size(); |
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| 159 | for (int i = 0; i<entries; i++) |
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| 160 | { |
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| 161 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Neutron::Neutron()) |
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| 162 | { n = n + 1; } |
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| 163 | } |
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| 164 | return n; |
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| 165 | } |
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| 166 | |
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| 167 | |
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| 168 | G4double G4PiMinusStopAbsorption::Energy() |
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| 169 | { |
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| 170 | G4double energy = 0.; |
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| 171 | G4double productEnergy = 0.; |
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| 172 | G4ThreeVector pProducts(0.,0.,0.); |
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| 173 | G4int nN = 0; |
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| 174 | G4int nP = 0; |
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| 175 | |
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| 176 | |
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| 177 | G4int nAbsorptionProducts = _absorptionProducts->size(); |
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| 178 | |
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| 179 | for (int i = 0; i<nAbsorptionProducts; i++) |
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| 180 | { |
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| 181 | productEnergy += (*_absorptionProducts)[i]->GetKineticEnergy(); |
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| 182 | pProducts = pProducts + (*_absorptionProducts)[i]->GetMomentum(); |
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| 183 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Neutron::Neutron()) nN++; |
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| 184 | if ((*_absorptionProducts)[i]->GetDefinition() == G4Proton::Proton()) nP++; |
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| 185 | } |
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| 186 | |
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| 187 | G4double productBinding = (G4NucleiPropertiesTable::GetBindingEnergy(static_cast<G4int>(_nucleusZ),static_cast<G4int>(_nucleusA)) / _nucleusA) * nAbsorptionProducts; |
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| 188 | G4double mass = G4NucleiProperties::GetNuclearMass(_nucleusA - (nP + nN),_nucleusZ - nP); |
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| 189 | G4double pNucleus = pProducts.mag(); |
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| 190 | G4double eNucleus = std::sqrt(pNucleus*pNucleus + mass*mass); |
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| 191 | G4double tNucleus = eNucleus - mass; |
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| 192 | G4double temp = G4NucleiPropertiesTable::GetBindingEnergy(static_cast<G4int>(_nucleusZ - nP),static_cast<G4int>(_nucleusA - (nP + nN))) - |
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| 193 | G4NucleiPropertiesTable::GetBindingEnergy(static_cast<G4int>(_nucleusZ),static_cast<G4int>(_nucleusA)); |
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| 194 | energy = productEnergy + productBinding + tNucleus; |
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| 195 | |
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| 196 | if (_level > 0) |
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| 197 | { |
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| 198 | std::cout << "E products " << productEnergy |
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| 199 | << " Binding " << productBinding << " " << temp << " " |
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| 200 | << " Tnucleus " << tNucleus |
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| 201 | << " energy = " << energy << G4endl; |
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| 202 | } |
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| 203 | |
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| 204 | return energy; |
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| 205 | } |
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| 206 | |
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| 207 | void G4PiMinusStopAbsorption::SetVerboseLevel(G4int level) |
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| 208 | { |
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| 209 | _level = level; |
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| 210 | return; |
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| 211 | } |
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