1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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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: G4SmpWatt.cc,v 1.4 2007/06/01 18:30:38 dennis Exp $ |
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57 | // |
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58 | |
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59 | #define nZAfis 39 /* 38 fissionable isotopes in ENDL + U-232 from ENDF7 */ |
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60 | #define WATTEMIN 1.0e-6 |
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61 | #define WATTEMAX 20.0 |
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62 | |
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63 | #include <cmath> |
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64 | #include "G4fissionEvent.hh" |
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65 | |
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66 | G4double G4fissionEvent::G4SmpWatt(G4double ePart, G4int iso) { |
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67 | |
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68 | /* |
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69 | Description |
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70 | Sample Watt Spectrum as in TART (Kalos algorithm) |
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71 | */ |
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72 | |
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73 | /* |
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74 | Input |
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75 | ePart - energy of incoming particle |
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76 | iso - isotope |
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77 | Output |
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78 | - energy of incoming particle |
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79 | */ |
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80 | |
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81 | static G4int nZA [nZAfis]= { |
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82 | 90231, 90232, 90233, |
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83 | 91233, |
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84 | 92232, 92233, 92234, 92235, 92236, 92237, 92238, 92239, 92240, |
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85 | 93235, 93236, 93237, 93238, |
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86 | 94237, 94238, 94239, 94240, 94241, 94242, 94243, |
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87 | 95241, 95242, 95243, |
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88 | 96242, 96243, 96244, 96245, 96246, 96247, 96248, |
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89 | 97249, |
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90 | 98249, 98250, 98251, 98252 |
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91 | }; |
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92 | |
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93 | static G4double Watta [nZAfis][3] = { |
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94 | {6.00949285e-05, -8.36695381e-03, 9.50939496e-01}, |
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95 | {6.54348443e-05, -8.86574327e-03, 9.55404490e-01}, |
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96 | {7.08173682e-05, -9.22676286e-03, 9.50088329e-01}, |
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97 | {6.35839062e-05, -8.63645973e-03, 9.24583535e-01}, |
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98 | {8.21929628e-05, 4.01922936e-03, 1.152121164e00}, |
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99 | {6.21335718e-05, -8.45651858e-03, 9.14717276e-01}, |
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100 | {6.81386135e-05, -8.99142394e-03, 9.21954824e-01}, |
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101 | {7.32627297e-05, -9.36908697e-03, 9.20107976e-01}, |
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102 | {8.06505279e-05, -9.95416671e-03, 9.27890410e-01}, |
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103 | {8.33208285e-05, -1.01073057e-02, 9.17691654e-01}, |
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104 | {8.96944680e-05, -1.06491070e-02, 9.25496030e-01}, |
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105 | {9.44608097e-05, -1.08940419e-02, 9.17795511e-01}, |
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106 | {1.01395704e-04, -1.15098159e-02, 9.29395462e-01}, |
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107 | {6.81110009e-05, -8.91619352e-03, 9.00047566e-01}, |
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108 | {7.21126359e-05, -9.20179363e-03, 8.95722889e-01}, |
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109 | {7.82371142e-05, -9.67050621e-03, 8.99574933e-01}, |
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110 | {8.27256297e-05, -9.99353009e-03, 8.97461897e-01}, |
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111 | {7.29458059e-05, -9.22415170e-03, 8.80996165e-01}, |
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112 | {8.02383914e-05, -9.78291439e-03, 8.88964070e-01}, |
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113 | {8.50641730e-05, -1.01099145e-02, 8.87304833e-01}, |
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114 | {9.10537157e-05, -1.05303084e-02, 8.89438514e-01}, |
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115 | {9.43014320e-05, -1.07133543e-02, 8.82632055e-01}, |
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116 | {1.02655616e-04, -1.13154691e-02, 8.91617174e-01}, |
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117 | {1.06118094e-04, -1.14971777e-02, 8.85181637e-01}, |
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118 | {9.08474473e-05, -1.04296303e-02, 8.71942958e-01}, |
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119 | {9.35633054e-05, -1.05612167e-02, 8.63930371e-01}, |
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120 | {1.01940441e-04, -1.11573929e-02, 8.73153437e-01}, |
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121 | {9.19501202e-05, -1.04229157e-02, 8.58681822e-01}, |
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122 | {9.42991674e-05, -1.05098872e-02, 8.49103546e-01}, |
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123 | {1.02747171e-04, -1.11371417e-02, 8.60434431e-01}, |
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124 | {1.05024967e-04, -1.12138980e-02, 8.51101942e-01}, |
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125 | {1.14130011e-04, -1.18692049e-02, 8.62838259e-01}, |
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126 | {1.15163673e-04, -1.18553822e-02, 8.51306646e-01}, |
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127 | {1.27169055e-04, -1.27033210e-02, 8.68623539e-01}, |
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128 | {1.24195213e-04, -1.24047085e-02, 8.48974077e-01}, |
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129 | {1.12616150e-04, -1.15135023e-02, 8.19708800e-01}, |
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130 | {1.23637465e-04, -1.22869889e-02, 8.35392018e-01}, |
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131 | {1.22724317e-04, -1.21677963e-02, 8.22569523e-01}, |
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132 | {1.33891595e-04, -1.29267762e-02, 8.37122909e-01} }; |
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133 | |
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134 | G4double a; /* Watt Parameters */ |
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135 | G4double b=1.0; |
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136 | |
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137 | G4double rand1,rand2; |
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138 | G4double x,y,z; |
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139 | G4double eSmp; |
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140 | G4int i; |
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141 | |
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142 | |
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143 | /* |
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144 | Find Watt parameters for isotope |
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145 | */ |
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146 | G4int isoindex=-1; |
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147 | for (i=0; isoindex == -1 && i<nZAfis; i++) { |
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148 | if (iso == nZA[i]) isoindex = i; |
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149 | } |
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150 | if (isoindex == -1) { |
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151 | std::string errMsg = "No Watt spectrum available for iso " + iso; |
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152 | G4fissionerr(6, "SmpWatt", errMsg); |
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153 | } |
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154 | |
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155 | a= Watta[isoindex][2] + ePart*(Watta[isoindex][1] + ePart*Watta[isoindex][0]); |
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156 | |
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157 | x= 1. + (b/(8.*a)); |
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158 | y= (x + std::sqrt(x*x-1.))/a; |
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159 | z= a*y - 1.; |
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160 | |
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161 | do { |
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162 | |
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163 | rand1= -std::log(fisslibrng()); |
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164 | rand2= -std::log(fisslibrng()); |
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165 | eSmp= y*rand1; |
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166 | |
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167 | } while ((rand2-z*(rand1+1.))*(rand2-z*(rand1+1.)) > b*y*rand1 || |
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168 | eSmp < WATTEMIN || eSmp > WATTEMAX); |
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169 | |
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170 | |
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171 | return eSmp; |
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172 | } |
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