[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 | // $Id: G4GEMCoulombBarrierHE.cc,v 1.6 2006/06/29 20:22:09 gunter Exp $ |
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[962] | 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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[819] | 29 | // |
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| 30 | // Hadronic Process: Nuclear De-excitations |
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| 31 | // by V. Lara (Dec 1999) |
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| 32 | |
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| 33 | |
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| 34 | #include "G4GEMCoulombBarrierHE.hh" |
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| 35 | #include "G4HadronicException.hh" |
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| 36 | #include <sstream> |
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| 37 | |
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| 38 | G4GEMCoulombBarrierHE::G4GEMCoulombBarrierHE(const G4GEMCoulombBarrierHE & ) : G4VCoulombBarrier() |
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| 39 | { |
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| 40 | throw G4HadronicException(__FILE__, __LINE__, "G4GEMCoulombBarrierHE::copy_constructor meant to not be accessable."); |
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| 41 | } |
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| 42 | |
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| 43 | |
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| 44 | const G4GEMCoulombBarrierHE & G4GEMCoulombBarrierHE::operator=(const G4GEMCoulombBarrierHE & ) |
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| 45 | { |
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| 46 | throw G4HadronicException(__FILE__, __LINE__, "G4GEMCoulombBarrierHE::operator= meant to not be accessable."); |
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| 47 | return *this; |
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| 48 | } |
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| 49 | |
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| 50 | G4bool G4GEMCoulombBarrierHE::operator==(const G4GEMCoulombBarrierHE & ) const |
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| 51 | { |
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| 52 | return false; |
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| 53 | } |
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| 54 | |
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| 55 | G4bool G4GEMCoulombBarrierHE::operator!=(const G4GEMCoulombBarrierHE & ) const |
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| 56 | { |
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| 57 | return true; |
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| 58 | } |
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| 59 | |
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| 60 | |
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| 61 | |
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| 62 | G4double G4GEMCoulombBarrierHE::GetCoulombBarrier(const G4int ARes, const G4int ZRes, const G4double U) const |
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| 63 | // Calculation of Coulomb potential energy (barrier) for outgoing fragment |
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| 64 | { |
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| 65 | G4double Barrier = 0.0; |
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| 66 | if (ZRes > ARes || ARes < 1) { |
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| 67 | std::ostringstream errOs; |
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| 68 | errOs << "G4GEMCoulombBarrierHE::GetCoulombBarrier: "; |
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| 69 | errOs << "Wrong values for "; |
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| 70 | errOs << "residual nucleus A = " << ARes << " "; |
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| 71 | errOs << "and residual nucleus Z = " << ZRes << G4endl; |
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| 72 | throw G4HadronicException(__FILE__, __LINE__, errOs.str()); |
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| 73 | } |
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| 74 | if (GetZ() == 0) { |
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| 75 | Barrier = 0.0; // If there is no charge there is neither barrier |
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| 76 | } else { |
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| 77 | G4double CompoundRadius = CalcCompoundRadius(static_cast<G4double>(ARes)); |
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| 78 | Barrier = ( elm_coupling * static_cast<G4double>(GetZ()) * static_cast<G4double>(ZRes) )/ |
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| 79 | (CompoundRadius+3.75*fermi); |
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| 80 | |
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| 81 | // Barrier penetration coeficient |
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| 82 | // G4double K = BarrierPenetrationFactor(ZRes); |
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| 83 | |
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| 84 | // Barrier *= K; |
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| 85 | |
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| 86 | Barrier /= (1.0 + std::sqrt(U/(2.0*static_cast<G4double>(ARes)))); |
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| 87 | } |
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| 88 | return Barrier; |
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| 89 | } |
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| 90 | |
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| 91 | |
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| 92 | G4double G4GEMCoulombBarrierHE::CalcCompoundRadius(const G4double ARes) const |
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| 93 | { |
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| 94 | G4double AresOneThird = std::pow(ARes,1.0/3.0); |
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| 95 | G4double AejectOneThird = std::pow(G4double(GetA()),1.0/3.0); |
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| 96 | |
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| 97 | G4double Result = 1.12*(AresOneThird + AejectOneThird) - |
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| 98 | 0.86*(AresOneThird+AejectOneThird)/(AresOneThird*AejectOneThird); |
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| 99 | |
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| 100 | return Result*fermi; |
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| 101 | } |
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| 102 | |
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| 103 | |
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