[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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[962] | 27 | // $Id: G4StatMFFragment.cc,v 1.7 2008/07/25 11:20:47 vnivanch Exp $ |
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[1340] | 28 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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[819] | 29 | // |
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| 30 | // Hadronic Process: Nuclear De-excitations |
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| 31 | // by V. Lara |
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| 32 | |
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| 33 | #include "G4StatMFFragment.hh" |
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| 34 | #include "G4HadronicException.hh" |
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| 35 | |
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| 36 | |
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| 37 | // Copy constructor |
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| 38 | G4StatMFFragment::G4StatMFFragment(const G4StatMFFragment & ) |
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| 39 | { |
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| 40 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::copy_constructor meant to not be accessable"); |
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| 41 | } |
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| 42 | |
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| 43 | // Operators |
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| 44 | |
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| 45 | G4StatMFFragment & G4StatMFFragment:: |
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| 46 | operator=(const G4StatMFFragment & ) |
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| 47 | { |
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| 48 | throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator= meant to not be accessable"); |
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| 49 | return *this; |
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| 50 | } |
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| 51 | |
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| 52 | |
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| 53 | G4bool G4StatMFFragment::operator==(const G4StatMFFragment & ) const |
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| 54 | { |
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| 55 | // throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator== meant to not be accessable"); |
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| 56 | return false; |
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| 57 | } |
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| 58 | |
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| 59 | |
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| 60 | G4bool G4StatMFFragment::operator!=(const G4StatMFFragment & ) const |
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| 61 | { |
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| 62 | // throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator!= meant to not be accessable"); |
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| 63 | return true; |
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| 64 | } |
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| 65 | |
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| 66 | |
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| 67 | |
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| 68 | G4double G4StatMFFragment::GetCoulombEnergy(void) const |
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| 69 | { |
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| 70 | if (theZ <= 0.1) return 0.0; |
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| 71 | G4double Coulomb = (3./5.)*(elm_coupling*theZ*theZ)* |
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| 72 | std::pow(1.0+G4StatMFParameters::GetKappaCoulomb(),1./3.)/ |
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| 73 | (G4StatMFParameters::Getr0()*std::pow(theA,1./3.)); |
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| 74 | |
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| 75 | return Coulomb; |
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| 76 | } |
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| 77 | |
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| 78 | |
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| 79 | G4double G4StatMFFragment::GetEnergy(const G4double T) const |
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| 80 | { |
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| 81 | if (theA < 1 || theZ < 0 || theZ > theA) { |
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| 82 | G4cerr << "G4StatMFFragment::GetEnergy: A = " << theA |
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| 83 | << ", Z = " << theZ << G4endl; |
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| 84 | throw G4HadronicException(__FILE__, __LINE__, |
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| 85 | "G4StatMFFragment::GetEnergy: Wrong values for A and Z!"); |
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| 86 | } |
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| 87 | G4double BulkEnergy = G4NucleiProperties::GetMassExcess(static_cast<G4int>(theA), |
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| 88 | static_cast<G4int>(theZ)); |
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| 89 | |
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| 90 | if (theA < 4) return BulkEnergy - GetCoulombEnergy(); |
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| 91 | |
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| 92 | G4double SurfaceEnergy; |
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| 93 | if (G4StatMFParameters::DBetaDT(T) == 0.0) SurfaceEnergy = 0.0; |
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| 94 | else SurfaceEnergy = (5./2.)*std::pow(theA,2.0/3.0)*T*T* |
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| 95 | G4StatMFParameters::GetBeta0()/ |
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| 96 | (G4StatMFParameters::GetCriticalTemp()* |
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| 97 | G4StatMFParameters::GetCriticalTemp()); |
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| 98 | |
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| 99 | |
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| 100 | G4double ExchangeEnergy = theA*T*T/GetInvLevelDensity(); |
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| 101 | if (theA != 4) ExchangeEnergy += SurfaceEnergy; |
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| 102 | |
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| 103 | return BulkEnergy + ExchangeEnergy - GetCoulombEnergy(); |
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| 104 | |
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| 105 | } |
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| 106 | |
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| 107 | |
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| 108 | G4double G4StatMFFragment::GetInvLevelDensity(void) const |
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| 109 | { |
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| 110 | // Calculate Inverse Density Level |
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| 111 | // Epsilon0*(1 + 3 /(Af - 1)) |
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| 112 | if (theA == 1) return 0.0; |
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| 113 | else return |
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| 114 | G4StatMFParameters::GetEpsilon0()*(1.0+3.0/(theA - 1.0)); |
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| 115 | } |
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| 116 | |
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| 117 | |
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| 118 | |
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| 119 | G4Fragment * G4StatMFFragment::GetFragment(const G4double T) |
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| 120 | { |
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| 121 | G4double U = CalcExcitationEnergy(T); |
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| 122 | |
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| 123 | G4double M = GetNuclearMass(); |
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| 124 | |
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| 125 | G4LorentzVector FourMomentum(_momentum,std::sqrt(_momentum.mag2()+(M+U)*(M+U))); |
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| 126 | |
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| 127 | G4Fragment * theFragment = new G4Fragment(static_cast<G4int>(theA),static_cast<G4int>(theZ),FourMomentum); |
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| 128 | |
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| 129 | return theFragment; |
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| 130 | } |
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| 131 | |
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| 132 | |
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| 133 | G4double G4StatMFFragment::CalcExcitationEnergy(const G4double T) |
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| 134 | { |
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| 135 | if (theA <= 3) return 0.0; |
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| 136 | |
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| 137 | G4double BulkEnergy = theA*T*T/GetInvLevelDensity(); |
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| 138 | |
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| 139 | // if it is an alpha particle: done |
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| 140 | if (theA == 4) return BulkEnergy; |
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| 141 | |
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| 142 | // Term connected with surface energy |
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| 143 | G4double SurfaceEnergy = 0.0; |
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| 144 | if (std::abs(G4StatMFParameters::DBetaDT(T)) > 1.0e-20) |
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| 145 | // SurfaceEnergy = (5./2.)*std::pow(theA,2.0/3.0)*T*T*G4StatMFParameters::GetBeta0()/ |
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| 146 | // (G4StatMFParameters::GetCriticalTemp()*G4StatMFParameters::GetCriticalTemp()); |
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| 147 | SurfaceEnergy = (5./2.)*std::pow(theA,2.0/3.0)*(G4StatMFParameters::Beta(T) - |
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| 148 | T*G4StatMFParameters::DBetaDT(T) - G4StatMFParameters::GetBeta0()); |
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| 149 | |
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| 150 | return BulkEnergy + SurfaceEnergy; |
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| 151 | } |
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| 152 | |
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| 153 | |
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