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 | // This software was developed by Lawrence Livermore National Laboratory. |
---|
28 | // |
---|
29 | // Redistribution and use in source and binary forms, with or without |
---|
30 | // modification, are permitted provided that the following conditions are met: |
---|
31 | // |
---|
32 | // 1. Redistributions of source code must retain the above copyright notice, |
---|
33 | // this list of conditions and the following disclaimer. |
---|
34 | // 2. Redistributions in binary form must reproduce the above copyright notice, |
---|
35 | // this list of conditions and the following disclaimer in the documentation |
---|
36 | // and/or other materials provided with the distribution. |
---|
37 | // 3. The name of the author may not be used to endorse or promote products |
---|
38 | // derived from this software without specific prior written permission. |
---|
39 | // |
---|
40 | // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
---|
41 | // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
---|
42 | // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
---|
43 | // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
---|
44 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
---|
45 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
---|
46 | // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
---|
47 | // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
---|
48 | // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
---|
49 | // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
---|
50 | // |
---|
51 | // Copyright (c) 2006 The Regents of the University of California. |
---|
52 | // All rights reserved. |
---|
53 | // UCRL-CODE-224807 |
---|
54 | // |
---|
55 | // |
---|
56 | // $Id: G4SmpSpNugDistData.cc,v 1.1 2007/05/30 01:00:12 dennis Exp $ |
---|
57 | // |
---|
58 | |
---|
59 | #include "G4fissionEvent.hh" |
---|
60 | |
---|
61 | #define nSPfissg 30 |
---|
62 | |
---|
63 | G4int G4fissionEvent::G4SmpSpNugDistData(G4int isotope) { |
---|
64 | |
---|
65 | /* |
---|
66 | Description |
---|
67 | Sample Number of Photons from spontaneous fission in |
---|
68 | (a) Cf-252 using the double Poisson model from Brunson; |
---|
69 | (b) Th-232, |
---|
70 | U-232, U-233, U-234, U-235, U-236, U-238*, |
---|
71 | Np-237, |
---|
72 | Pu-238*, Pu-239, Pu-240*, Pu-241, Pu-242*, |
---|
73 | Am-241, |
---|
74 | Cm-242*, Cm-244*, |
---|
75 | Bk-249 |
---|
76 | using the negative binomial distribution based on the |
---|
77 | spontaneous fission neutron nubar from Ensslin's |
---|
78 | tabulated data or Holden and Zucker's tabulated data |
---|
79 | (for isotopes denoted with asterix *). |
---|
80 | */ |
---|
81 | |
---|
82 | /* |
---|
83 | Input |
---|
84 | iso - isotope |
---|
85 | Output |
---|
86 | G4SmpSpNugDistData - sampled multiplicity |
---|
87 | -1 if there is no multiplicity data for that isotope |
---|
88 | */ |
---|
89 | |
---|
90 | G4int i; |
---|
91 | G4double sum, nubar; |
---|
92 | G4double r; |
---|
93 | |
---|
94 | static G4double Cf252spdist [nSPfissg] = { |
---|
95 | 5.162699e-4,3.742057e-3,1.360482e-2,3.312786e-2,6.090540e-2, |
---|
96 | 9.043537e-2,1.133984e-1,1.240985e-1,1.216759e-1,1.092255e-1, |
---|
97 | 9.137106e-2,7.219960e-2,5.438060e-2,3.923091e-2,2.714690e-2, |
---|
98 | 1.800781e-2,1.143520e-2,6.942099e-3,4.025720e-3,2.229510e-3, |
---|
99 | 1.179602e-3,5.966936e-4,2.888766e-4,1.340137e-4,5.965291e-5, |
---|
100 | 2.551191e-5,1.049692e-5,4.160575e-6,1.590596e-6,0.000000e+0 |
---|
101 | }; |
---|
102 | |
---|
103 | /* |
---|
104 | sample the spontaneous fission photon number distribution |
---|
105 | */ |
---|
106 | nubar=0.; |
---|
107 | if (isotope == 98252) { |
---|
108 | // Cf-252 using the G4double Poisson model from Brunson; |
---|
109 | r=fisslibrng(); |
---|
110 | |
---|
111 | sum=0.; |
---|
112 | for(i=0; i<nSPfissg; i++) { |
---|
113 | sum=sum+Cf252spdist[i]; |
---|
114 | if (r <= sum || Cf252spdist[i+1] == 0.) return i; |
---|
115 | } |
---|
116 | } else if (isotope == 92238) { |
---|
117 | /* |
---|
118 | using the spontaneous fission nubar from |
---|
119 | Holden and Zucker's tabulated data |
---|
120 | */ |
---|
121 | nubar = 1.9900002; |
---|
122 | } else if (isotope == 94240) { |
---|
123 | nubar = 2.1540006; |
---|
124 | } else if (isotope == 94242) { |
---|
125 | nubar = 2.1489998; |
---|
126 | } else if (isotope == 96242) { |
---|
127 | nubar = 2.54; |
---|
128 | } else if (isotope == 96244) { |
---|
129 | nubar = 2.7200005; |
---|
130 | } else if (isotope == 94238) { |
---|
131 | nubar = 2.2100301; |
---|
132 | } |
---|
133 | |
---|
134 | if (nubar != 0.) { |
---|
135 | return G4SmpNugDist(isotope, nubar); |
---|
136 | } else { |
---|
137 | /* |
---|
138 | using the spontaneous fission nubar from |
---|
139 | N. Ensslin, et.al., "Application Guide to Neutron |
---|
140 | Multiplicity Counting," LA-13422-M (November 1998) |
---|
141 | */ |
---|
142 | nubar = G4SmpSpNubarData(isotope); |
---|
143 | if (nubar != -1.) { |
---|
144 | return G4SmpNugDist(isotope, nubar); |
---|
145 | } else { |
---|
146 | // There is no nubar information for that isotope, return -1, |
---|
147 | // meaning no data available for that isotope |
---|
148 | return -1; |
---|
149 | } |
---|
150 | } |
---|
151 | } |
---|