[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // ------------------------------------------------------------------- |
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| 28 | // GEANT 4 class file |
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| 29 | // |
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| 30 | // CERN, Geneva, Switzerland |
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| 31 | // |
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| 32 | // File name: G4VGammaDeexcitation |
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| 33 | // |
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| 34 | // Author: Maria Grazia Pia (pia@genova.infn.it) |
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| 35 | // |
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| 36 | // Creation date: 23 October 1998 |
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| 37 | // |
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| 38 | // Modifications: |
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| 39 | // |
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| 40 | // 21 Nov 2001, Fan Lei (flei@space.qinetiq.com) |
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| 41 | // Modified GenerateGamma() and UpdateUncleus() for implementation |
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| 42 | // of Internal Conversion processs |
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| 43 | // |
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| 44 | // 15 April 1999, Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it) |
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| 45 | // Added creation time evaluation for products of evaporation |
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| 46 | // |
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| 47 | // |
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| 48 | // ------------------------------------------------------------------- |
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| 49 | |
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| 50 | #include "G4VGammaDeexcitation.hh" |
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| 51 | |
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| 52 | #include "globals.hh" |
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| 53 | #include "Randomize.hh" |
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| 54 | #include "G4Gamma.hh" |
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| 55 | #include "G4Electron.hh" |
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| 56 | #include "G4LorentzVector.hh" |
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| 57 | #include "G4VGammaTransition.hh" |
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| 58 | #include "G4Fragment.hh" |
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| 59 | #include "G4FragmentVector.hh" |
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| 60 | |
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| 61 | #include "G4ParticleTable.hh" |
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| 62 | #include "G4IonTable.hh" |
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| 63 | |
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| 64 | #include "G4DiscreteGammaTransition.hh" |
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| 65 | |
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| 66 | G4VGammaDeexcitation::G4VGammaDeexcitation(): _transition(0), _verbose(0), |
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| 67 | _electronO (0), _vSN(-1) |
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| 68 | { } |
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| 69 | |
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| 70 | |
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| 71 | G4VGammaDeexcitation::~G4VGammaDeexcitation() |
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| 72 | { |
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| 73 | // if (_transition != 0) delete _transition; |
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| 74 | } |
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| 75 | |
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| 76 | |
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| 77 | G4FragmentVector* G4VGammaDeexcitation::DoTransition() |
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| 78 | { |
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| 79 | // Template method |
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| 80 | |
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| 81 | Initialize(); |
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| 82 | G4FragmentVector* products = new G4FragmentVector; |
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| 83 | |
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| 84 | if (CanDoTransition()) |
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| 85 | { |
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| 86 | G4Fragment* gamma = GenerateGamma(); |
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| 87 | if (gamma != 0) |
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| 88 | { |
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| 89 | products->push_back(gamma); |
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| 90 | UpdateNucleus(gamma); |
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| 91 | Update(); |
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| 92 | } |
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| 93 | } |
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| 94 | |
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| 95 | if (_verbose > 1) |
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| 96 | G4cout << "G4VGammaDeexcitation::DoTransition - Transition deleted " << G4endl; |
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| 97 | |
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| 98 | if (_transition != 0) delete _transition; |
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| 99 | |
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| 100 | return products; |
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| 101 | } |
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| 102 | |
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| 103 | G4FragmentVector* G4VGammaDeexcitation::DoChain() |
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| 104 | { |
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| 105 | Initialize(); |
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| 106 | G4FragmentVector* products = new G4FragmentVector; |
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| 107 | |
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| 108 | while (CanDoTransition()) |
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| 109 | { |
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| 110 | if (_verbose > 5) G4cout << "G4VGammaDeexcitation::DoChain - Looping" << G4endl; |
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| 111 | |
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| 112 | G4Fragment* gamma = GenerateGamma(); |
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| 113 | if (gamma != 0) |
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| 114 | { |
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| 115 | products->push_back(gamma); |
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| 116 | UpdateNucleus(gamma); |
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| 117 | UpdateElectrons (); |
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| 118 | } |
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| 119 | Update(); |
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| 120 | } |
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| 121 | |
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| 122 | if (_verbose > 1) |
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| 123 | G4cout << "G4VGammaDeexcitation::DoChain - Transition deleted, end of chain " << G4endl; |
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| 124 | |
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| 125 | if (_transition != 0) delete _transition; |
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| 126 | |
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| 127 | return products; |
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| 128 | } |
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| 129 | |
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| 130 | |
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| 131 | const G4Fragment& G4VGammaDeexcitation::GetNucleus() const |
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| 132 | { |
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| 133 | return _nucleus; |
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| 134 | } |
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| 135 | |
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| 136 | |
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| 137 | void G4VGammaDeexcitation::SetNucleus(const G4Fragment& nucleus) |
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| 138 | { |
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| 139 | _nucleus = G4Fragment(nucleus); |
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| 140 | } |
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| 141 | |
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| 142 | |
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| 143 | G4Fragment* G4VGammaDeexcitation::GenerateGamma() |
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| 144 | { |
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| 145 | G4double eGamma = 0.; |
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| 146 | |
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| 147 | if (_transition != 0) { |
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| 148 | _transition->SelectGamma(); // it can be conversion electron too |
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| 149 | eGamma = _transition->GetGammaEnergy(); |
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| 150 | } |
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| 151 | if (_verbose > 1 && _transition != 0 ) |
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| 152 | { |
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| 153 | G4cout << "G4VGammaDeexcitation::GenerateGamma - Gamma energy " << eGamma |
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| 154 | << " ** New excitation " << _nucleus.GetExcitationEnergy() - eGamma |
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| 155 | << G4endl; |
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| 156 | } |
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| 157 | |
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| 158 | // Photon momentum isotropically generated |
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| 159 | // the same for electron |
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| 160 | |
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| 161 | if (eGamma > 0.) |
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| 162 | { |
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| 163 | G4double cosTheta = 1. - 2. * G4UniformRand(); |
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| 164 | G4double sinTheta = std::sqrt(1. - cosTheta * cosTheta); |
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| 165 | G4double phi = twopi * G4UniformRand(); |
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| 166 | G4double pM = eGamma; |
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| 167 | G4DiscreteGammaTransition* dtransition = 0; |
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| 168 | dtransition = dynamic_cast <G4DiscreteGammaTransition*> (_transition); |
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| 169 | if ( dtransition && !( dtransition->IsAGamma()) ) { |
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| 170 | G4double eMass = G4Electron::ElectronDefinition()->GetPDGMass(); |
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| 171 | pM =std::sqrt(eGamma*(eGamma + 2.0*eMass)); |
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| 172 | eGamma = eGamma + eMass; |
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| 173 | } |
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| 174 | G4ThreeVector pGamma( pM * sinTheta * std::cos(phi), |
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| 175 | pM * sinTheta * std::sin(phi), |
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| 176 | pM * cosTheta ); |
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| 177 | G4LorentzVector gamma(pGamma, eGamma); |
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| 178 | // gamma.boost(_nucleus.GetMomentum().boostVector() ); |
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| 179 | G4Fragment* gammaFragment ; |
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| 180 | if ( dtransition && !(dtransition->IsAGamma()) ){ |
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| 181 | gammaFragment = new G4Fragment(gamma,G4Electron::ElectronDefinition()); |
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| 182 | } else { |
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| 183 | gammaFragment = new G4Fragment(gamma,G4Gamma::GammaDefinition()); |
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| 184 | } |
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| 185 | G4double gammaTime = _transition->GetGammaCreationTime(); |
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| 186 | gammaTime += _nucleus.GetCreationTime(); |
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| 187 | gammaFragment->SetCreationTime(gammaTime); |
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| 188 | |
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| 189 | if (_verbose > 1 && dtransition ) |
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| 190 | G4cout << "G4VGammaDeexcitation::GenerateGamma - Gamma fragment generated: " |
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| 191 | << (dtransition->IsAGamma() ? " Gamma" : " Electron" ) << G4endl; |
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| 192 | return gammaFragment; |
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| 193 | } |
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| 194 | else |
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| 195 | { |
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| 196 | return 0; |
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| 197 | } |
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| 198 | } |
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| 199 | |
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| 200 | void G4VGammaDeexcitation::UpdateNucleus(const G4Fragment* gamma) |
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| 201 | { |
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| 202 | G4LorentzVector p4Gamma = gamma->GetMomentum(); |
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| 203 | G4ThreeVector pGamma(p4Gamma.vect()); |
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| 204 | |
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| 205 | G4double eGamma = 0.; |
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| 206 | if (_transition != 0) |
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| 207 | eGamma = _transition->GetGammaEnergy(); |
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| 208 | G4DiscreteGammaTransition* dtransition = 0; |
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| 209 | dtransition = dynamic_cast <G4DiscreteGammaTransition*> (_transition); |
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| 210 | if (dtransition && !(dtransition->IsAGamma()) ) |
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| 211 | eGamma += dtransition->GetBondEnergy(); |
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| 212 | |
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| 213 | G4LorentzVector p4Nucleus(_nucleus.GetMomentum() ); |
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| 214 | |
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| 215 | // New tetravector calculation: |
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| 216 | |
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| 217 | // G4double Mass = G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(_nucleus.GetZ(),_nucleus.GetA()); |
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| 218 | G4double m1 = G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(static_cast<G4int>(_nucleus.GetZ()), |
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| 219 | static_cast<G4int>(_nucleus.GetA())); |
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| 220 | G4double m2 = _nucleus.GetZ() * G4Proton::Proton()->GetPDGMass() + |
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| 221 | (_nucleus.GetA()- _nucleus.GetZ())*G4Neutron::Neutron()->GetPDGMass(); |
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| 222 | |
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| 223 | G4double Mass = std::min(m1,m2); |
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| 224 | |
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| 225 | |
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| 226 | G4double newExcitation = p4Nucleus.mag() - Mass - eGamma; |
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| 227 | if(newExcitation < 0) |
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| 228 | newExcitation = 0; |
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| 229 | |
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| 230 | G4ThreeVector p3Residual(p4Nucleus.vect() - pGamma); |
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| 231 | G4double newEnergy = std::sqrt(p3Residual * p3Residual + |
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| 232 | (Mass + newExcitation) * (Mass + newExcitation)); |
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| 233 | G4LorentzVector p4Residual(p3Residual, newEnergy); |
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| 234 | |
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| 235 | // G4LorentzVector p4Residual(-pGamma, p4Nucleus.e() - eGamma); |
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| 236 | // p4Residual.boost( _nucleus.GetMomentum().boostVector() ); |
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| 237 | |
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| 238 | // Update excited nucleus parameters |
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| 239 | |
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| 240 | _nucleus.SetMomentum(p4Residual); |
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| 241 | _nucleus.SetCreationTime(gamma->GetCreationTime()); |
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| 242 | |
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| 243 | // if (_transition != 0) |
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| 244 | // { |
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| 245 | // G4double excitation =_transition->GetEnergyTo(); |
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| 246 | // if (excitation < 0.) excitation = 0.0; |
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| 247 | // _nucleus.SetExcitationEnergy(excitation); |
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| 248 | // } |
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| 249 | |
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| 250 | return; |
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| 251 | } |
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| 252 | |
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| 253 | void G4VGammaDeexcitation::UpdateElectrons( ) |
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| 254 | { |
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| 255 | G4DiscreteGammaTransition* dtransition = 0; |
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| 256 | dtransition = dynamic_cast <G4DiscreteGammaTransition*> (_transition); |
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| 257 | if (dtransition && !(dtransition->IsAGamma()) ) { |
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| 258 | |
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| 259 | _vSN = dtransition->GetOrbitNumber(); |
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| 260 | _electronO.RemoveElectron(_vSN); |
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| 261 | } |
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| 262 | return; |
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| 263 | } |
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| 264 | |
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| 265 | void G4VGammaDeexcitation::Update() |
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| 266 | { |
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| 267 | if (_transition != 0) |
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| 268 | { |
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| 269 | delete _transition; |
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| 270 | _transition = 0; |
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| 271 | if (_verbose > 1) |
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| 272 | G4cout << "G4VGammaDeexcitation::Update - Transition deleted " << G4endl; |
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| 273 | } |
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| 274 | |
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| 275 | _transition = CreateTransition(); |
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| 276 | if (_transition != 0) |
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| 277 | { |
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| 278 | _transition->SetEnergyFrom(_nucleus.GetExcitationEnergy()); |
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| 279 | // if ( _vSN != -1) (dynamic_cast <G4DiscreteGammaTransition*> (_transition))->SetICM(false); |
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| 280 | // the above line is commented out for bug fix #952. It was intruduced for reason that |
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| 281 | // the k-shell electron is most likely one to be kicked out and there is no time for |
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| 282 | // the atom to deexcite before the next IC. But this limitation is causing other problems as |
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| 283 | // reported in #952 |
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| 284 | } |
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| 285 | |
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| 286 | return; |
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| 287 | } |
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| 288 | |
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| 289 | |
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| 290 | void G4VGammaDeexcitation::Initialize() |
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| 291 | { |
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| 292 | _transition = CreateTransition(); |
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| 293 | if (_transition != 0) { |
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| 294 | _transition->SetEnergyFrom(_nucleus.GetExcitationEnergy()); |
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| 295 | } |
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| 296 | return; |
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| 297 | } |
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| 298 | |
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| 299 | |
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| 300 | void G4VGammaDeexcitation::SetVerboseLevel(G4int verbose) |
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| 301 | { |
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| 302 | _verbose = verbose; |
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| 303 | return; |
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| 304 | } |
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| 305 | |
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| 306 | |
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| 307 | |
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| 308 | |
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| 309 | |
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| 310 | |
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