1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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11 | // * Neither the authors of this software system, nor their employing * |
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13 | // * work make any representation or warranty, express or implied, * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // This software was developed by Lawrence Livermore National Laboratory. |
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28 | // |
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29 | // Redistribution and use in source and binary forms, with or without |
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30 | // modification, are permitted provided that the following conditions are met: |
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31 | // |
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32 | // 1. Redistributions of source code must retain the above copyright notice, |
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33 | // this list of conditions and the following disclaimer. |
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34 | // 2. Redistributions in binary form must reproduce the above copyright notice, |
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35 | // this list of conditions and the following disclaimer in the documentation |
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36 | // and/or other materials provided with the distribution. |
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37 | // 3. The name of the author may not be used to endorse or promote products |
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38 | // derived from this software without specific prior written permission. |
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39 | // |
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40 | // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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41 | // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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42 | // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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43 | // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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45 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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46 | // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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47 | // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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48 | // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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49 | // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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50 | // |
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51 | // Copyright (c) 2006 The Regents of the University of California. |
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52 | // All rights reserved. |
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53 | // UCRL-CODE-224807 |
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54 | // |
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55 | // |
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56 | // $Id: G4SmpNuDistDataU235.cc,v 1.3 2007/06/01 13:46:53 gcosmo Exp $ |
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57 | // |
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58 | |
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59 | #include <cmath> |
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60 | #include "G4fissionEvent.hh" |
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61 | |
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62 | G4int G4fissionEvent::G4SmpNuDistDataU235(G4double erg, G4int option) { |
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63 | |
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64 | /* |
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65 | Description |
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66 | Sample Number of Neutrons from fission in U-235 using probability |
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67 | distributions based on either |
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68 | (option 0) Zucker and Holden's tabulated data for U-235 |
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69 | (option 1) Zucker and Holden's tabulated data for U-235 and |
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70 | Gwin, Spencer and Ingle tabulated data for U-235 |
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71 | at thermal energies |
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72 | */ |
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73 | |
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74 | /* |
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75 | Input |
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76 | erg - incident neutron energy |
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77 | option - 0 for sampling Zucker and Holden probability distributions |
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78 | 1 for sampling probability distributions based on Zucker |
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79 | and Holden tabulated distributions as well as Gwin, |
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80 | Spencer and Ingle tabulated distributions at thermal |
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81 | energies |
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82 | Output |
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83 | G4SmpNuDistDataU235 - sampled multiplicity |
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84 | |
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85 | */ |
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86 | |
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87 | G4double cpnu; |
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88 | G4double pnu[] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 }; |
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89 | G4double eng; |
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90 | G4double r; |
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91 | |
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92 | /* |
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93 | Check if energy is within the range of experimental values |
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94 | */ |
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95 | if (erg > 10) eng=10.; |
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96 | else eng=erg; |
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97 | |
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98 | r=fisslibrng(); |
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99 | /* |
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100 | U-235 nu distribution |
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101 | */ |
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102 | if (option == 0) { |
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103 | if (eng <= 3.0) pnu[0]=0.0317223e0-9.67117e-3*eng+1.9726e-3*std::pow(eng,2)-2.33933e-4*std::pow(eng,3); |
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104 | if (eng > 3 && eng <= 7) pnu[0]=-1.24147e-2+2.52982e-2*eng-7.88108e-3*std::pow(eng,2)+9.10008e-4*std::pow(eng,3)-3.67208e-5*std::pow(eng,4); |
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105 | if (eng > 7 && eng <= 10) pnu[0]=6.31258e-2-1.89764e-2*eng+1.94475e-3*std::pow(eng,2)-6.74e-5*std::pow(eng,3); |
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106 | if (r <= pnu[0]) return 0; |
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107 | |
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108 | if (eng <= 4.0) pnu[1]=0.171707e0-0.0178305e0*eng+3.42286e-3*std::pow(eng,2)-2.1168e-3*std::pow(eng,3)+3.84226e-4*std::pow(eng,4)-1.44289e-5*std::pow(eng,5); |
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109 | if (eng > 4 && eng <= 7) pnu[1]=9.8633e-2+3.53323e-2*eng-1.15037e-2*std::pow(eng,2)+7.4e-4*std::pow(eng,3); |
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110 | if (eng > 7 && eng <= 10) pnu[1]=0.628295-0.180677*eng+1.80664e-2*std::pow(eng,2)-6.2015e-4*std::pow(eng,3); |
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111 | cpnu=pnu[0]+pnu[1]; |
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112 | if (r <= cpnu) return 1; |
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113 | |
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114 | if (eng <= 4.0) pnu[2]=0.336199e0-1.59569e-2*eng+2.78036e-3*std::pow(eng,2)-1.59278e-3*std::pow(eng,3)+2.21742e-4*std::pow(eng,4); |
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115 | if (eng > 4 && eng <= 8) pnu[2]=0.229153e0+5.27561e-2*eng-1.29288e-2*std::pow(eng,2)+5.67233e-4*std::pow(eng,3)+8.06667e-6*std::pow(eng,4); |
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116 | if (eng > 8 && eng <= 10) pnu[2]=-0.395206e0+0.227399e0*eng-2.86051e-2*std::pow(eng,2)+1.08196e-3*std::pow(eng,3); |
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117 | cpnu=cpnu+pnu[2]; |
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118 | if (r <= cpnu) return 2; |
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119 | |
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120 | if (eng <= 5.0) pnu[3]=0.30395461e0+0.01348261e0*eng-0.00262298e0*std::pow(eng,2)+1.99482407e-4*std::pow(eng,3); |
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121 | if (eng > 5 && eng <= 10) pnu[3]=0.10992355e0+0.09246839e0*eng-0.00885344e0*std::pow(eng,2)-7.60589252e-4*std::pow(eng,3)+1.50973591e-4*std::pow(eng,4)-6.20436503e-6*std::pow(eng,5); |
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122 | cpnu=cpnu+pnu[3]; |
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123 | if (r <= cpnu) return 3; |
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124 | |
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125 | if (eng <= 4.0) pnu[4]=0.126946e0+1.64489e-2*eng+2.44029e-3*std::pow(eng,2)-2.1019e-3*std::pow(eng,3)+8.50104e-4*std::pow(eng,4)-1.10127e-4*std::pow(eng,5); |
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126 | if (eng > 4 && eng <= 8) pnu[4]=0.263373e0-7.47799e-2*eng+2.0588e-2*std::pow(eng,2)-1.55132e-3*std::pow(eng,3)+3.025e-5*std::pow(eng,4); |
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127 | if (eng > 8 && eng <= 10) pnu[4]=-0.277491e0+0.157606e0*eng-1.38467e-2*std::pow(eng,2)+4.20357e-4*std::pow(eng,3); |
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128 | cpnu=cpnu+pnu[4]; |
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129 | if (r <= cpnu) return 4; |
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130 | |
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131 | if (eng <= 4.0) pnu[5]=0.0266793e0+9.05206e-3*eng-6.58754e-4*std::pow(eng,2)+6.26292e-4*std::pow(eng,3)-9.75958e-5*std::pow(eng,4); |
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132 | if (eng > 4 && eng <= 8) pnu[5]=0.0693092e0-1.46524e-2*eng+3.2841e-3*std::pow(eng,2)+1.50833e-4*std::pow(eng,3)-2.13e-5*std::pow(eng,4); |
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133 | if (eng > 8 && eng <= 10) pnu[5]=0.881442e0-0.271486e0*eng+3.15097e-2*std::pow(eng,2)-1.12095e-3*std::pow(eng,3); |
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134 | cpnu=cpnu+pnu[5]; |
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135 | if (r <= cpnu) return 5; |
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136 | |
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137 | |
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138 | if (eng <= 4.0) pnu[6]=0.0026322e0+2.44017e-4*eng+4.55992e-4*std::pow(eng,2)+1.25233e-4*std::pow(eng,3)-2.35417e-5*std::pow(eng,4); |
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139 | if (eng > 4 && eng <= 8) pnu[6]=-5.3989e-3+9.48298e-3*eng-2.95864e-3*std::pow(eng,2)+5.43025e-4*std::pow(eng,3)-2.75625e-5*std::pow(eng,4); |
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140 | if (eng > 8 && eng <= 10) pnu[6]=0.177058-5.57839e-2*eng+6.81359e-3*std::pow(eng,2)-2.35568e-4*std::pow(eng,3); |
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141 | cpnu=cpnu+pnu[6]; |
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142 | if (r <= cpnu) return 6; |
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143 | else return 7; |
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144 | |
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145 | } else if (option == 1) { |
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146 | if (eng <= 3.0) pnu[0]=0.0291000e0-4.836167e-3*eng-6.72500e-4*std::pow(eng,2)+2.076667e-4*std::pow(eng,3); |
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147 | if (eng > 3 && eng <= 7) pnu[0]=-1.23950e-2+2.52790e-2*eng-7.874333e-3*std::pow(eng,2)+9.09000e-4*std::pow(eng,3)-3.666667e-5*std::pow(eng,4); |
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148 | if (eng > 7 && eng <= 10) pnu[0]=6.328200e-2-1.903283e-2*eng+1.951500e-3*std::pow(eng,2)-6.766667e-5*std::pow(eng,3); |
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149 | if (r <= pnu[0]) return 0; |
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150 | |
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151 | if (eng <= 4.0) pnu[1]=0.166000e0-0.005591833e0*eng-5.624500e-3*std::pow(eng,2)+7.673333e-4*std::pow(eng,3)-2.00000e-6*std::pow(eng,4); |
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152 | if (eng > 4 && eng <= 7) pnu[1]=9.860600e-2+3.534733e-2*eng-1.150650e-2*std::pow(eng,2)+7.401667e-4*std::pow(eng,3); |
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153 | if (eng > 7 && eng <= 10) pnu[1]=0.628401e0-0.1807157e0*eng+1.807100e-2*std::pow(eng,2)-6.203333e-4*std::pow(eng,3); |
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154 | cpnu=pnu[0]+pnu[1]; |
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155 | if (r <= cpnu) return 1; |
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156 | |
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157 | if (eng <= 4.0) pnu[2]=0.336200e0-1.596058e-2*eng+2.783625e-3*std::pow(eng,2)-1.593917e-3*std::pow(eng,3)+2.21875e-4*std::pow(eng,4); |
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158 | if (eng > 4 && eng <= 8) pnu[2]=0.2292350e0+5.26925e-2*eng-1.291067e-2*std::pow(eng,2)+5.650000e-4*std::pow(eng,3)+8.166667e-6*std::pow(eng,4); |
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159 | if (eng > 8 && eng <= 10) pnu[2]=0.3838230e0-3.4439e-2*eng+6.0800e-4*std::pow(eng,2); |
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160 | cpnu=cpnu+pnu[2]; |
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161 | if (r <= cpnu) return 2; |
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162 | |
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163 | if (eng <= 4.0) pnu[3]=0.3074000e0+0.00794125e0*eng-0.0002580417e0*std::pow(eng,2)-1.875000e-5*std::pow(eng,3)-2.145833e-5*std::pow(eng,4); |
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164 | if (eng > 4 && eng <= 7) pnu[3]=0.3152270e0-2.623667e-3*eng+2.785000e-3*std::pow(eng,2)-3.273333e-4*std::pow(eng,3); |
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165 | if (eng > 7 && eng <= 10) pnu[3]=0.6476430e0-0.1046148e0*eng+1.181600e-2*std::pow(eng,2)-5.051667e-4*std::pow(eng,3); |
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166 | cpnu=cpnu+pnu[3]; |
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167 | if (r <= cpnu) return 3; |
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168 | |
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169 | if (eng <= 4.0) pnu[4]=0.133300e0+5.853750e-3*eng+6.200875e-3*std::pow(eng,2)-8.95250e-4*std::pow(eng,3)+1.36250e-5*std::pow(eng,4); |
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170 | if (eng > 4 && eng <= 7) pnu[4]=0.2379650e0-5.548167e-2*eng+1.517350e-2*std::pow(eng,2)-8.858333e-4*std::pow(eng,3); |
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171 | if (eng > 7 && eng <= 10) pnu[4]=-0.5408690e0+0.2461313e0*eng-2.372350e-2*std::pow(eng,2)+7.861667e-4*std::pow(eng,3); |
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172 | cpnu=cpnu+pnu[4]; |
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173 | if (r <= cpnu) return 4; |
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174 | |
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175 | if (eng <= 4.0) pnu[5]=0.025900e0+1.067450e-2*eng-1.794000e-3*std::pow(eng,2)+9.50500e-4*std::pow(eng,3)-1.3000e-4*std::pow(eng,4); |
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176 | if (eng > 4 && eng <= 7) pnu[5]=0.0871960e0-2.823683e-2*eng+7.0955e-3*std::pow(eng,2)-3.176667e-4*std::pow(eng,3); |
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177 | if (eng > 7 && eng <= 10) pnu[5]=-0.591650e0+0.2236360e0*eng-2.373100e-2*std::pow(eng,2)+9.25000e-4*std::pow(eng,3); |
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178 | cpnu=cpnu+pnu[5]; |
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179 | if (r <= cpnu) return 5; |
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180 | |
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181 | if (eng <= 4.0) pnu[6]=0.002100e0+1.35500e-3*eng-3.235833e-4*std::pow(eng,2)+3.48500e-4*std::pow(eng,3)-4.591667e-5*std::pow(eng,4); |
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182 | if (eng > 4 && eng <= 8) pnu[6]=1.767200e-2-8.055667e-3*eng+1.96650e-3*std::pow(eng,2)-6.283333e-5*std::pow(eng,3); |
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183 | if (eng > 8 && eng <= 10) pnu[6]=-0.2485310e0+8.72590e-2*eng-9.14550e-3*std::pow(eng,2)+3.555000e-4*std::pow(eng,3); |
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184 | cpnu=cpnu+pnu[6]; |
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185 | if (r <= cpnu) return 6; |
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186 | else return 7; |
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187 | } |
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188 | // |
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189 | // Fall through |
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190 | // |
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191 | |
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192 | G4cout << " SmpNuDistDataU235: unrecognized option = " << option << G4endl; |
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193 | return -1; |
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194 | |
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195 | } |
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