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: G4EvaporationLevelDensityParameter.cc,v 1.9 2009/03/04 11:05:02 gcosmo Exp $ |
---|
28 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
---|
29 | // |
---|
30 | // Hadronic Process: Nuclear De-excitations |
---|
31 | // by V. Lara (Oct 1998) |
---|
32 | // |
---|
33 | |
---|
34 | |
---|
35 | #include "G4EvaporationLevelDensityParameter.hh" |
---|
36 | #include "G4HadronicException.hh" |
---|
37 | |
---|
38 | // Those values are from table 3 in |
---|
39 | // A.S. Iljinov et al. Nucl Phys A543 (1992) 517-557 |
---|
40 | // Table 3. alpha, beta and gamma for Cameron Shell corrections |
---|
41 | // whithout collective effects. f-factor = 2.31. |
---|
42 | |
---|
43 | //JMQ 17-04-08 these are not used at present in G4Evaporation |
---|
44 | const G4double G4EvaporationLevelDensityParameter::ConstEvapLevelDensityParameter = 0.125*(1./MeV); |
---|
45 | //const G4double G4EvaporationLevelDensityParameter::ConstEvapLevelDensityParameter= 0.0769231*(1./MeV); |
---|
46 | const G4double G4EvaporationLevelDensityParameter::alpha = 0.072*(1./MeV); |
---|
47 | const G4double G4EvaporationLevelDensityParameter::beta = 0.257*(1./MeV); |
---|
48 | const G4double G4EvaporationLevelDensityParameter::gamma = 0.059*(1./MeV); |
---|
49 | const G4double G4EvaporationLevelDensityParameter::Bs = 1.0; |
---|
50 | |
---|
51 | G4EvaporationLevelDensityParameter::G4EvaporationLevelDensityParameter() {} |
---|
52 | G4EvaporationLevelDensityParameter::~G4EvaporationLevelDensityParameter() {} |
---|
53 | |
---|
54 | G4EvaporationLevelDensityParameter:: |
---|
55 | G4EvaporationLevelDensityParameter(const G4EvaporationLevelDensityParameter &) : G4VLevelDensityParameter() |
---|
56 | { |
---|
57 | throw G4HadronicException(__FILE__, __LINE__, "G4EvaporationLevelDensityParameter::copy_constructor meant to not be accessable"); |
---|
58 | } |
---|
59 | |
---|
60 | |
---|
61 | const G4EvaporationLevelDensityParameter & G4EvaporationLevelDensityParameter:: |
---|
62 | operator=(const G4EvaporationLevelDensityParameter &) |
---|
63 | { |
---|
64 | throw G4HadronicException(__FILE__, __LINE__, "G4EvaporationLevelDensityParameter::operator= meant to not be accessable"); |
---|
65 | return *this; |
---|
66 | } |
---|
67 | |
---|
68 | |
---|
69 | G4bool G4EvaporationLevelDensityParameter::operator==(const G4EvaporationLevelDensityParameter &) const |
---|
70 | { |
---|
71 | return false; |
---|
72 | } |
---|
73 | |
---|
74 | G4bool G4EvaporationLevelDensityParameter::operator!=(const G4EvaporationLevelDensityParameter &) const |
---|
75 | { |
---|
76 | return true; |
---|
77 | } |
---|
78 | |
---|
79 | G4double G4EvaporationLevelDensityParameter::LevelDensityParameter(const G4int A,const G4int, |
---|
80 | const G4double) const |
---|
81 | //JMQ (Apr .08) this is the method used in G4Evaporation |
---|
82 | { |
---|
83 | |
---|
84 | //JMQ 25/04/08 a=A/10 according to original Gudima's prescription |
---|
85 | G4double a=static_cast<G4double>(A)/10.; |
---|
86 | return a; |
---|
87 | // |
---|
88 | |
---|
89 | // G4int N = A - Z; |
---|
90 | |
---|
91 | // Asymptotic Level Density Parameter |
---|
92 | // G4double AsymptoticLDP = (alpha*static_cast<G4double>(A) + beta*std::pow(static_cast<G4double>(A),2./3.)*Bs)/MeV; |
---|
93 | |
---|
94 | // Shape of the LDP U dependence |
---|
95 | // G4double exponent = -gamma*U; |
---|
96 | // G4double f = 1.; |
---|
97 | // if (exponent > -300.) f -= std::exp(exponent); |
---|
98 | |
---|
99 | // Level Density Parameter |
---|
100 | // G4double a = AsymptoticLDP*(1. + ShellCorrection(Z,N)*f/U); |
---|
101 | // return a; |
---|
102 | } |
---|
103 | |
---|