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27 // This software was developed by Lawrence Liv
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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 "G4Log.hh"
60 #include "G4Pow.hh"
61 #include "G4fissionEvent.hh"
62
63 G4double G4fissionEvent::G4SmpNEngCf252(G4int
64
65 /*
66 Description
67 Sample energy spectrum for Cf-252.
68 */
69
70 /*
71 Input
72 option - 0 Mannhart corrected Maxwellia
73 1 Madland-Nix theoretical spec
74 2 Froehner Watt spectrum
75 Return
76 energy of neutron emitted by spontaneous f
77 */
78
79 G4Pow* Pow=G4Pow::GetInstance();
80
81 G4double a,b;
82 G4double gpar;
83 G4double g2;
84 G4double ferg;
85 G4double r;
86
87 r = fisslibrng();
88
89 /*
90 Mannhart Corrected Spectrum
91 */
92 if(option == 0) {
93 if(r == 0) return 0.000001;
94 if (r > 0.0 && r <= 0.0005)
95 return 0.00003 + 0.04992*(r/0.0005) - 0.
96 + 5.44877*Pow->powN(r/0.0005,3) - 2
97 + 97.14014*Pow->powN(r/0.0005,5) -
98 + 268.2301*Pow->powN(r/0.0005,7) -
99 + 98.96285*Pow->powN(r/0.0005,9) -
100
101 if (r > 0.0005 && r <= 0.005)
102 return 0.01118 + 0.06715*((r-.0005)/.004
103 - 0.09236*Pow->powN((r-.0005)/.0045
104 - 0.64784*Pow->powN((r-.0005)/.0045
105 - 1.43858*Pow->powN((r-.0005)/.0045
106 - 0.51839*Pow->powN((r-.0005)/.0045
107
108 if (r > 0.005 && r <= 0.05)
109 return 0.05244+0.32101*((r-.005)/.045)
110 - 0.52574*Pow->powN((r-.005)/.045,
111 - 14.88036*Pow->powN((r-.005)/.045,
112 -133.64517*Pow->powN((r-.005)/.045,
113 -186.86758*Pow->powN((r-.005)/.045,
114 - 20.55275*Pow->powN((r-.005)/.045,
115
116 if(r > 0.05 && r <= 0.25) return 0.25585+0
117
118 if(r > 0.25 && r <= 0.50) return 0.87609+0
119
120 if(r > 0.5 && r <= 0.75) return 1.69622+0.
121
122 if(r > 0.75 && r <= 0.95) return 2.91217+1
123 if(r > 0.95 && r <= 0.975) return 5.50137
124
125 if(r > 0.975 && r <= 0.995) return 6.5217
126 if(r > 0.995 && r <= 0.999) return 9.0050
127 if(r > 0.999 && r <= 0.9997) return 11.83
128 if(r > 0.9997) return 20.;
129 }
130 /*
131 Madland-Nix Spectrum
132 */
133 if(option == 1) {
134 if(r <= 1.001065092e-03) return 1.9463138
135 else if(r > 1.001065092e-03 && r <= 1.001
136 else if(r > 1.001389105e-02 && r <= 5.022
137 else if(r > 5.022359145e-02 && r <= 1.000
138 else if(r > 1.000989427e-01 && r <= 1.500
139 else if(r > 1.500872491e-01 && r <= 2.002
140 else if(r > 2.002079974e-01 && r <= 2.252
141 else if(r > 2.25221648e-01 && r <= 2.5015
142 else if(r > 2.501564538e-01 && r <= 2.752
143 else if(r > 2.752546770e-01 && r <= 3.000
144 else if(r > 3.000964724e-01 && r <= 3.500
145 else if(r > 3.500470095e-01 && r <= 4.001
146 else if(r > 4.001118970e-01 && r <= 5.000
147 else if(r > 5.000461778e-01 && r <= 5.501
148 else if(r > 5.501318506e-01 && r <= 6.000
149 else if(r > 6.000655433e-01 && r <= 6.500
150 else if(r > 6.500147305e-01 && r <= 7.000
151 else if(r > 7.000271284e-01 && r <= 7.501
152 else if(r > 7.501159110e-01 && r <= 8.000
153 else if(r > 8.000662513e-01 && r <= 8.500
154 else if(r > 8.500772033e-01 && r <= 8.750
155 else if(r > 8.750123088e-01 && r <= 9.000
156 else if(r > 9.000106866e-01 && r <= 9.250
157 else if(r > 9.250286977e-01 && r <= 9.350
158 else if(r > 9.350074655e-01 && r <= 9.400
159 else if(r > 9.400070002e-01 && r <= 9.500
160 else if(r > 9.500026229e-01 && r <= 9.600
161 else if(r > 9.600065896e-01 && r <= 9.700
162 else if(r > 9.700165577e-01 && r <= 9.750
163 else if(r > 9.750157135e-01 && r <= 9.800
164 else if(r > 9.800101585e-01 && r <= 9.850
165 else if(r > 9.850018119e-01 && r <= 9.875
166 else if(r > 9.875072929e-01 && r <= 9.900
167 else if(r > 9.900006975e-01 && r <= 9.925
168 else if(r > 9.925048152e-01 && r <= 9.935
169 else if(r > 9.935030103e-01 && r <= 9.945
170 else if(r > 9.945000177e-01 && r <= 9.950
171 else if(r > 9.950025127e-01 && r <= 9.955
172 else if(r > 9.955029368e-01 && r <= 9.960
173 else if(r > 9.960005970e-01 && r <= 9.965
174 else if(r > 9.965016080e-01 && r <= 9.970
175 else if(r > 9.970001795e-01 && r <= 9.975
176 else if(r > 9.975004375e-01 && r <= 9.978
177 else if(r > 9.978504408e-01 && r <= 9.989
178 return 2.72756636666e5-5.47258138432e5*
179 else if(r > 9.989524675e-01 && r <= 9.994
180 return 1.14946879661e6-2.30252188973e6*
181 else if(r > 9.994929298e-01 && r <= 9.997
182 return 4.90621526236e6-9.81982943883e6*
183 else if(r > 9.997558922e-01 && r <= 9.998
184 return 2.11365688795184e7-4.22884732250
185 else if(r > 9.998830120e-01 && r <= 9.999
186 return 9.18987945911229e7-1.83829506875
187 else if(r > 9.999441620e-01 && r <= 9.999
188 return 4.02781481130433e8-8.05629656768
189 else if(r > 9.999734440e-01 && r <= 9.999
190 return 1.77804635135775e9-3.55623257045
191 else if(r > 9.999874120e-01 && r <= 9.999
192 return 7.90099032702915e9-1.58022749659
193 else if(r > 9.999940510e-01 && r <= 9.999
194 return 3.53223507413091e10-7.0645322716
195 else if(r > 9.999971960e-01 && r <= 9.999
196 return 1.58786475903785e11-3.1757426684
197 else if(r > 9.999986820e-01 && r <= 9.999
198 return 7.17433904438156e11-1.4348705997
199 else if(r > 9.999993820e-01 && r <= 9.999
200 return 3.257374123945330e12-6.514754184
201 else if(r > 9.999997110e-01 && r <= 9.999
202 return 1.48641255466171e13-2.9728263753
203 else if(r > 9.999998650e-01 && r <= 9.999
204 return 6.82056055248876e13-1.3641123811
205 else if(r > 9.999999370e-01 && r <= 1.000
206 return 3.14919363013517e14-6.2983878407
207 }
208 /*
209 Frohner Watt Spectrum
210 */
211 if (option == 2) {
212 a=1.175;
213 b=1.040;
214
215 G4int icounter=0;
216 G4int icounter_max=1024;
217 do {
218 gpar = std::sqrt(Pow->powA(1+0.125*a*b,2
219 g2=-G4Log(fisslibrng());
220 ferg=a*gpar*g2;
221
222 icounter++;
223 if ( icounter > icounter_max ) {
224 G4cout << "Loop-counter exceeded the thresh
225 break;
226 }
227
228 } while (Pow->powA((1-gpar)*(1+g2)-G4Log(f
229 // Loop checking, 11.03.2015, T. Koi
230 return ferg;
231 }
232
233 //
234 // Fall through
235 //
236
237 G4cout << " SmpNEngCf252: unrecognized optio
238 return -1.0;
239 }
240