| 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: G4EvaporationLevelDensityParameter.cc,v 1.10 2010/11/15 16:09:46 vnivanch Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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| 29 | // |
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| 30 | // Hadronic Process: Nuclear De-excitations |
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| 31 | // by V. Lara (Oct 1998) |
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| 32 | // |
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| 33 | |
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| 34 | |
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| 35 | #include "G4EvaporationLevelDensityParameter.hh" |
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| 36 | #include "G4HadronicException.hh" |
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| 37 | |
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| 38 | // Those values are from table 3 in |
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| 39 | // A.S. Iljinov et al. Nucl Phys A543 (1992) 517-557 |
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| 40 | // Table 3. alpha, beta and gamma for Cameron Shell corrections |
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| 41 | // whithout collective effects. f-factor = 2.31. |
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| 42 | |
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| 43 | //JMQ 17-04-08 these are not used at present in G4Evaporation |
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| 44 | const G4double G4EvaporationLevelDensityParameter::ConstEvapLevelDensityParameter = 0.125/MeV; |
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| 45 | //const G4double G4EvaporationLevelDensityParameter::ConstEvapLevelDensityParameter= 0.0769231/MeV; |
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| 46 | const G4double G4EvaporationLevelDensityParameter::alpha = 0.072/MeV; |
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| 47 | const G4double G4EvaporationLevelDensityParameter::beta = 0.257/MeV; |
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| 48 | const G4double G4EvaporationLevelDensityParameter::gamma = 0.059/MeV; |
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| 49 | const G4double G4EvaporationLevelDensityParameter::Bs = 1.0; |
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| 50 | |
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| 51 | G4EvaporationLevelDensityParameter::G4EvaporationLevelDensityParameter() {} |
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| 52 | G4EvaporationLevelDensityParameter::~G4EvaporationLevelDensityParameter() {} |
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| 53 | |
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| 54 | G4double |
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| 55 | G4EvaporationLevelDensityParameter::LevelDensityParameter(G4int A, G4int, G4double) const |
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| 56 | //JMQ (Apr .08) this is the method used in G4Evaporation |
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| 57 | { |
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| 58 | |
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| 59 | //JMQ 25/04/08 a=A/10 according to original Gudima's prescription |
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| 60 | G4double a=static_cast<G4double>(A)/10.; |
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| 61 | return a; |
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| 62 | // |
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| 63 | |
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| 64 | // G4int N = A - Z; |
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| 65 | |
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| 66 | // Asymptotic Level Density Parameter |
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| 67 | // G4double AsymptoticLDP = (alpha*static_cast<G4double>(A) + beta*std::pow(static_cast<G4double>(A),2./3.)*Bs)/MeV; |
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| 68 | |
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| 69 | // Shape of the LDP U dependence |
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| 70 | // G4double exponent = -gamma*U; |
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| 71 | // G4double f = 1.; |
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| 72 | // if (exponent > -300.) f -= std::exp(exponent); |
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| 73 | |
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| 74 | // Level Density Parameter |
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| 75 | // G4double a = AsymptoticLDP*(1. + ShellCorrection(Z,N)*f/U); |
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| 76 | // return a; |
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| 77 | } |
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| 78 | |
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