1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // |
---|
27 | // $Id: G4StatMFParameters.cc,v 1.5 2008/07/25 11:20:47 vnivanch Exp $ |
---|
28 | // GEANT4 tag $Name: geant4-09-02 $ |
---|
29 | // |
---|
30 | // Hadronic Process: Nuclear De-excitations |
---|
31 | // by V. Lara |
---|
32 | |
---|
33 | |
---|
34 | #include "G4StatMFParameters.hh" |
---|
35 | |
---|
36 | |
---|
37 | const G4double G4StatMFParameters::_Kappa = 1.0; // dimensionless |
---|
38 | |
---|
39 | const G4double G4StatMFParameters::_KappaCoulomb = 2.0; // dimensionless |
---|
40 | |
---|
41 | const G4double G4StatMFParameters::_Epsilon0 = 16.0*MeV; |
---|
42 | |
---|
43 | // Bethe-Weizsacker coefficients |
---|
44 | const G4double G4StatMFParameters::_E0 = 16.0*MeV; |
---|
45 | |
---|
46 | const G4double G4StatMFParameters::_Beta0 = 18.0*MeV; |
---|
47 | |
---|
48 | const G4double G4StatMFParameters::_Gamma0 = 25.0*MeV; |
---|
49 | |
---|
50 | // Critical temperature (for liquid-gas phase transitions) |
---|
51 | const G4double G4StatMFParameters::_CriticalTemp = 18.0*MeV; |
---|
52 | |
---|
53 | // Nuclear radius |
---|
54 | const G4double G4StatMFParameters::_r0 = 1.17*fermi; |
---|
55 | |
---|
56 | G4double G4StatMFParameters::Beta(const G4double T) |
---|
57 | { |
---|
58 | if (T > _CriticalTemp) return 0.0; |
---|
59 | else { |
---|
60 | G4double CriticalTempSqr = _CriticalTemp*_CriticalTemp; |
---|
61 | G4double TempSqr = T*T; |
---|
62 | G4double tmp = (CriticalTempSqr-TempSqr)/(CriticalTempSqr+TempSqr); |
---|
63 | |
---|
64 | return _Beta0*tmp*std::pow(tmp,1.0/4.0); |
---|
65 | } |
---|
66 | } |
---|
67 | |
---|
68 | G4double G4StatMFParameters::DBetaDT(const G4double T) |
---|
69 | { |
---|
70 | if (T > _CriticalTemp) return 0.0; |
---|
71 | else { |
---|
72 | G4double CriticalTempSqr = _CriticalTemp*_CriticalTemp; |
---|
73 | G4double TempSqr = T*T; |
---|
74 | G4double tmp = (CriticalTempSqr-TempSqr)/(CriticalTempSqr+TempSqr); |
---|
75 | |
---|
76 | return -5.0*_Beta0*std::pow(tmp,1.0/4.0)*(CriticalTempSqr*T)/ |
---|
77 | ((CriticalTempSqr+TempSqr)*(CriticalTempSqr+TempSqr)); |
---|
78 | } |
---|
79 | } |
---|
80 | |
---|
81 | G4double G4StatMFParameters::GetMaxAverageMultiplicity(const G4int A) |
---|
82 | { |
---|
83 | // Maximun average multiplicity: M_0 = 2.6 for A ~ 200 |
---|
84 | // and M_0 = 3.3 for A <= 110 |
---|
85 | G4double MaxAverageMultiplicity = 2.6; |
---|
86 | if (A <= 110) MaxAverageMultiplicity = 3.3; |
---|
87 | return MaxAverageMultiplicity; |
---|
88 | } |
---|
89 | |
---|
90 | G4StatMFParameters G4StatMFParameters::theStatMFParameters; |
---|
91 | |
---|
92 | |
---|
93 | G4StatMFParameters * G4StatMFParameters::GetAddress() |
---|
94 | { return &theStatMFParameters; } |
---|
95 | |
---|