| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
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18 // * This code implementation is the result
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24 // *******************************************
25 //
26 //
27 // This software was developed by Lawrence Liv
28 //
29 // Redistribution and use in source and binary
30 // modification, are permitted provided that t
31 //
32 // 1. Redistributions of source code must reta
33 // this list of conditions and the following
34 // 2. Redistributions in binary form must repr
35 // this list of conditions and the following
36 // and/or other materials provided with the
37 // 3. The name of the author may not be used t
38 // derived from this software without specif
39 //
40 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``A
41 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
42 // MERCHANTABILITY AND FITNESS FOR A PARTICULA
43 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DI
44 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGE
45 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES
46 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AN
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50 //
51 // Copyright (c) 2006 The Regents of the Unive
52 // All rights reserved.
53 // UCRL-CODE-224807
54 //
55 //
56 //
57
58 #include <cmath>
59 #include "G4Pow.hh"
60 #include "G4fissionEvent.hh"
61
62 G4int G4fissionEvent::G4SmpNuDistDataU238(G4do
63
64 /*
65 Description
66 Sample Number of Neutrons from fission in
67 Zucker and Holden's tabulated data for U
68 */
69
70 /*
71 Input
72 erg - incident neutron energy
73 Output
74 G4SmpNuDistDataU238 - sampled multiplicit
75
76 */
77
78 G4double cpnu;
79 G4double pnu[] = {0.0, 0.0, 0.0, 0.0, 0.0, 0
80 G4double eng;
81 G4double r;
82
83 /*
84 Check if energy is within the range of exper
85 */
86 if (erg > 10) eng=10.;
87 else eng=erg;
88
89 r=fisslibrng();
90 /*
91 U-238 nu distribution
92 */
93 G4Pow* Pow=G4Pow::GetInstance();
94 if (eng <= 5.0) pnu[0]=0.0396484e0-1.14202e-
95 if (eng > 5 && eng <= 10) pnu[0]=0.0360013e0
96 if (r <= pnu[0]) return 0;
97
98 if (eng <= 5.0) pnu[1]=0.252954e0-5.17151e-2
99 if (eng > 5 && eng <= 10) pnu[1]=0.259093e0-
100 cpnu=pnu[0]+pnu[1];
101 if (r <= cpnu) return 1;
102
103 pnu[2]=0.29395353e0+0.01098908e0*eng-0.00565
104 cpnu=cpnu+pnu[2];
105 if (r <= cpnu) return 2;
106
107 if (eng <= 5.0) pnu[3]=0.264447e0+3.02825e-2
108 if (eng > 5 && eng <= 10) pnu[3]=0.262024e0+
109 cpnu=cpnu+pnu[3];
110 if (r <= cpnu) return 3;
111
112 if (eng <= 5) pnu[4]=0.111176e0+1.66321e-2*e
113 if (eng > 5 && eng <= 10) pnu[4]=0.107859e0+
114 cpnu=cpnu+pnu[4];
115 if (r <= cpnu) return 4;
116
117 if (eng <= 5.0) pnu[5]=0.0312261e0+4.12932e-
118 if (eng > 5 && eng <= 10) pnu[5]=0.0324008e0
119 cpnu=cpnu+pnu[5];
120 if (r <= cpnu) return 5;
121
122 if (eng <= 5.0) pnu[6]=5.9347e-3+9.80023e-4*
123 if (eng > 5 && eng <= 10) pnu[6]=6.5421e-3+3
124 cpnu=cpnu+pnu[6];
125 if (r <= cpnu) return 6;
126
127 if (eng <= 5.0) pnu[7]=5.436e-4+1.3756e-4*en
128 if (eng > 5 && eng <= 10) pnu[7]=9.212e-4-1.
129 cpnu=cpnu+pnu[7];
130 if (r <= cpnu) return 7;
131 else return 8;
132 }
133