Geant4 10.7.0
Toolkit for the simulation of the passage of particles through matter
Loading...
Searching...
No Matches
G4SmpNuDistDataPu239.cc
Go to the documentation of this file.
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//
57
58#include <cmath>
59#include "G4Pow.hh"
60#include "G4fissionEvent.hh"
61
62G4int G4fissionEvent::G4SmpNuDistDataPu239(G4double erg) {
63
64/*
65 Description
66 Sample Number of Neutrons from fission in Pu-239 using
67 Zucker and Holden's tabulated data for Pu-239
68*/
69
70/*
71 Input
72 erg - incident neutron energy
73 Output
74 G4SmpNuDistDataPu239 - sampled multiplicity
75
76*/
77
78 G4double cpnu;
79 G4double pnu[8] = {0.0, 0.0, 0.0, 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 experimental values
85*/
86 if (erg > 10) eng=10.;
87 else eng=erg;
88
89 r=fisslibrng();
90
91/*
92 Pu-239 nu distribution
93*/
94 G4Pow* Pow=G4Pow::GetInstance();
95 if (eng <= 5.0) pnu[0] = 0.0108826e0 - 0.00207694e0*eng
96 - 6.5e-4*Pow->powN(eng,2) + 4.023e-4*Pow->powN(eng,3)
97 - 7.93e-5*Pow->powN(eng,4) + 5.53666667e-6*Pow->powN(eng,5);
98 if (eng > 5 && eng <= 10) pnu[0] = 0.078606e0 - 5.17531e-2*eng
99 + 1.42034e-2*Pow->powN(eng,2) - 1.96292e-3*Pow->powN(eng,3)
100 + 1.34512e-4*Pow->powN(eng,4) - 3.63416e-6*Pow->powN(eng,5);
101 if (r <= pnu[0]) return 0;
102
103
104 if (eng <= 5.0) pnu[1] = 0.0994916e0 - 0.01979542e0*eng
105 - 0.00236583e0*Pow->powN(eng,2) + 0.0020581e0*Pow->powN(eng,3)
106 - 4.14016667e-4*Pow->powN(eng,4) + 2.85666667e-5*Pow->powN(eng,5);
107 if (eng > 5 && eng <= 10) pnu[1] = 0.10052e0 - 2.61361e-2*eng
108 + 3.78355e-3*Pow->powN(eng,2) - 3.70667e-4*Pow->powN(eng,3)
109 + 1.95458e-5*Pow->powN(eng,4) - 3.87499e-7*Pow->powN(eng,5);
110 cpnu=pnu[0]+pnu[1];
111 if (r <= cpnu) return 1;
112
113
114 if (eng <= 5.0) pnu[2] = 0.2748898e0 - 0.01565248e0*eng
115 - 0.00749681e0*Pow->powN(eng,2) + 0.00217121e0*Pow->powN(eng,3)
116 - 3.13041667e-4*Pow->powN(eng,4) + 1.88183333e-5*Pow->powN(eng,5);
117 if (eng > 5 && eng <= 10) pnu[2] = 0.282487e0 - 0.0261342e0*eng
118 - 1.16895e-3*Pow->powN(eng,2) + 1.9888e-4*Pow->powN(eng,3)
119 - 6.41257e-6*Pow->powN(eng,4) + 1.02502e-7*Pow->powN(eng,5);
120 cpnu=cpnu+pnu[2];
121 if (r <= cpnu) return 2;
122
123 if (eng <= 5.0) pnu[3] = 0.3269196e0 + 0.00428312e0*eng
124 - 0.00189322e0*Pow->powN(eng,2) - 4.31925001e-4*Pow->powN(eng,3)
125 + 1.18466667e-4*Pow->powN(eng,4) - 9.04166668e-6*Pow->powN(eng,5);
126 if (eng > 5 && eng <= 10) pnu[3] = 0.329058e0 + 4.023e-3*eng
127 - 3.06402e-3*Pow->powN(eng,2) + 2.2628e-4*Pow->powN(eng,3)
128 - 1.50875e-5*Pow->powN(eng,4) + 4.39168e-7*Pow->powN(eng,5);
129 cpnu=cpnu+pnu[3];
130 if (r <= cpnu) return 3;
131
132 if (eng <= 5.0) pnu[4] = 0.2046061e0 + 0.02633899e0*eng
133 + 0.0041514e0*Pow->powN(eng,2) - 0.00275542e0*Pow->powN(eng,3)
134 + 5.0325e-4*Pow->powN(eng,4) - 3.32158333e-5*Pow->powN(eng,5);
135 if (eng > 5 && eng <= 10) pnu[4] = 0.18992e0 + 4.55188e-2*eng
136 - 7.06316e-3*Pow->powN(eng,2) + 7.29916e-4*Pow->powN(eng,3)
137 - 4.71791e-5*Pow->powN(eng,4) + 1.185e-6*Pow->powN(eng,5);
138 cpnu=cpnu+pnu[4];
139 if (r <= cpnu) return 4;
140
141 if (eng <= 5.0) pnu[5] = 0.0726834e0 + 0.00116043e0*eng
142 + 0.007572e0*Pow->powN(eng,2) - 0.00161972e0*Pow->powN(eng,3)
143 + 2.3545e-4*Pow->powN(eng,4) - 1.546e-5*Pow->powN(eng,5);
144 if (eng > 5 && eng <= 10) pnu[5] = 0.0779212e0 - 1.35849e-3*eng
145 + 6.68583e-3*Pow->powN(eng,2) - 7.98649e-4*Pow->powN(eng,3)
146 + 4.88625e-5*Pow->powN(eng,4) - 1.54167e-6*Pow->powN(eng,5);
147 cpnu=cpnu+pnu[5];
148 if (r <= cpnu) return 5;
149
150 if (eng <= 5.0) pnu[6] = 0.0097282e0 + 0.00494589e0*eng
151 + 0.00115294e0*Pow->powN(eng,2) - 3.25191667e-4*Pow->powN(eng,3)
152 + 6.00083333e-5*Pow->powN(eng,4) - 3.745e-6*Pow->powN(eng,5);
153 if (eng > 5 && eng <= 10) pnu[6] = 7.85432e-3 + 7.33182e-3*eng
154 - 2.03705e-4*Pow->powN(eng,2) + 8.73787e-5*Pow->powN(eng,3)
155 - 4.24164e-6*Pow->powN(eng,4) + 2.37499e-7*Pow->powN(eng,5);
156 cpnu=cpnu+pnu[6];
157 if (r <= cpnu) return 6;
158
159 if (eng <= 5.0) pnu[7] = 6.301e-4 + 1.10666667e-4*eng
160 + 4.28016667e-4*Pow->powN(eng,2) + 1.12041667e-5*Pow->powN(eng,3)
161 - 4.31666667e-6*Pow->powN(eng,4) + 3.29166667e-7*Pow->powN(eng,5);
162 if (eng > 5 && eng <= 10) pnu[7] = 1.5323e-3 - 7.91857e-4*eng
163 + 8.01017e-4*Pow->powN(eng,2) - 6.82833e-5*Pow->powN(eng,3)
164 + 4.38333e-6*Pow->powN(eng,4) - 6.0e-8*Pow->powN(eng,5);
165 cpnu=cpnu+pnu[7];
166 if (r <= cpnu) return 7;
167 else return 8;
168}
G4double
double G4double
Definition: G4Types.hh:83
G4int
int G4int
Definition: G4Types.hh:85
G4Pow
Definition: G4Pow.hh:49
G4Pow::GetInstance
static G4Pow * GetInstance()
Definition: G4Pow.cc:41
G4Pow::powN
G4double powN(G4double x, G4int n) const
Definition: G4Pow.cc:166