| 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: G4StatMFParameters.cc,v 1.5 2008/07/25 11:20:47 vnivanch Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $
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| 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 |
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| 34 | #include "G4StatMFParameters.hh"
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| 35 |
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| 36 |
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| 37 | const G4double G4StatMFParameters::_Kappa = 1.0; // dimensionless
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| 38 |
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| 39 | const G4double G4StatMFParameters::_KappaCoulomb = 2.0; // dimensionless
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| 40 |
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| 41 | const G4double G4StatMFParameters::_Epsilon0 = 16.0*MeV;
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| 42 |
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| 43 | // Bethe-Weizsacker coefficients
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| 44 | const G4double G4StatMFParameters::_E0 = 16.0*MeV;
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| 45 |
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| 46 | const G4double G4StatMFParameters::_Beta0 = 18.0*MeV;
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| 47 |
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| 48 | const G4double G4StatMFParameters::_Gamma0 = 25.0*MeV;
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| 49 |
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| 50 | // Critical temperature (for liquid-gas phase transitions)
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| 51 | const G4double G4StatMFParameters::_CriticalTemp = 18.0*MeV;
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| 52 |
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| 53 | // Nuclear radius
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| 54 | const G4double G4StatMFParameters::_r0 = 1.17*fermi;
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| 55 |
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| 56 | G4double G4StatMFParameters::Beta(const G4double T)
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| 57 | {
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| 58 | if (T > _CriticalTemp) return 0.0;
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| 59 | else {
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| 60 | G4double CriticalTempSqr = _CriticalTemp*_CriticalTemp;
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| 61 | G4double TempSqr = T*T;
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| 62 | G4double tmp = (CriticalTempSqr-TempSqr)/(CriticalTempSqr+TempSqr);
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| 63 |
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| 64 | return _Beta0*tmp*std::pow(tmp,1.0/4.0);
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| 65 | }
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| 66 | }
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| 67 |
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| 68 | G4double G4StatMFParameters::DBetaDT(const G4double T)
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| 69 | {
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| 70 | if (T > _CriticalTemp) return 0.0;
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| 71 | else {
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| 72 | G4double CriticalTempSqr = _CriticalTemp*_CriticalTemp;
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| 73 | G4double TempSqr = T*T;
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| 74 | G4double tmp = (CriticalTempSqr-TempSqr)/(CriticalTempSqr+TempSqr);
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| 75 |
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| 76 | return -5.0*_Beta0*std::pow(tmp,1.0/4.0)*(CriticalTempSqr*T)/
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| 77 | ((CriticalTempSqr+TempSqr)*(CriticalTempSqr+TempSqr));
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| 78 | }
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| 79 | }
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| 80 |
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| 81 | G4double G4StatMFParameters::GetMaxAverageMultiplicity(const G4int A)
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| 82 | {
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| 83 | // Maximun average multiplicity: M_0 = 2.6 for A ~ 200
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| 84 | // and M_0 = 3.3 for A <= 110
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| 85 | G4double MaxAverageMultiplicity = 2.6;
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| 86 | if (A <= 110) MaxAverageMultiplicity = 3.3;
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| 87 | return MaxAverageMultiplicity;
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| 88 | }
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| 89 |
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| 90 | G4StatMFParameters G4StatMFParameters::theStatMFParameters;
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| 91 |
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| 92 |
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| 93 | G4StatMFParameters * G4StatMFParameters::GetAddress()
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| 94 | { return &theStatMFParameters; }
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| 95 |
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