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: G4SmpNuDistDataU238.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::G4SmpNuDistDataU238(G4double erg) { |
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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-238 using |
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67 | Zucker and Holden's tabulated data for U-238 |
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68 | */ |
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69 | |
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70 | /* |
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71 | Input |
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72 | erg - incident neutron energy |
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73 | Output |
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74 | G4SmpNuDistDataU238 - sampled multiplicity |
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75 | |
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76 | */ |
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77 | |
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78 | G4double cpnu; |
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79 | G4double pnu[] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; |
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80 | G4double eng; |
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81 | G4double r; |
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82 | |
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83 | /* |
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84 | Check if energy is within the range of experimental values |
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85 | */ |
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86 | if (erg > 10) eng=10.; |
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87 | else eng=erg; |
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88 | |
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89 | r=fisslibrng(); |
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90 | /* |
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91 | U-238 nu distribution |
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92 | */ |
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93 | if (eng <= 5.0) pnu[0]=0.0396484e0-1.14202e-2*eng+1.94627e-3*std::pow(eng,2)-2.95412e-4*std::pow(eng,3)+2.98333e-5*std::pow(eng,4)-1.31417e-6*std::pow(eng,5); |
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94 | if (eng > 5 && eng <= 10) pnu[0]=0.0360013e0-8.06662e-3*eng+6.59461e-4*std::pow(eng,2)-3.54123e-5*std::pow(eng,3)+2.03749e-6*std::pow(eng,4)-5.91663e-8*std::pow(eng,5); |
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95 | if (r <= pnu[0]) return 0; |
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96 | |
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97 | if (eng <= 5.0) pnu[1]=0.252954e0-5.17151e-2*eng+2.84558e-3*std::pow(eng,2)+2.93563e-4*std::pow(eng,3)-5.99833e-5*std::pow(eng,4)+3.34417e-6*std::pow(eng,5); |
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98 | if (eng > 5 && eng <= 10) pnu[1]=0.259093e0-5.7936e-2*eng+5.50734e-3*std::pow(eng,2)-3.09607e-4*std::pow(eng,3)+1.20957e-5*std::pow(eng,4)-2.49997e-7*std::pow(eng,5); |
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99 | cpnu=pnu[0]+pnu[1]; |
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100 | if (r <= cpnu) return 1; |
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101 | |
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102 | pnu[2]=0.29395353e0+0.01098908e0*eng-0.00565976e0*std::pow(eng,2)+3.14515399e-4*std::pow(eng,3)-5.66793415e-6*std::pow(eng,4)+1.54070513e-7*std::pow(eng,5); |
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103 | cpnu=cpnu+pnu[2]; |
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104 | if (r <= cpnu) return 2; |
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105 | |
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106 | if (eng <= 5.0) pnu[3]=0.264447e0+3.02825e-2*eng-3.12762e-3*std::pow(eng,2)-1.5875e-4*std::pow(eng,3)+4.91667e-5*std::pow(eng,4)-3.38667e-6*std::pow(eng,5); |
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107 | if (eng > 5 && eng <= 10) pnu[3]=0.262024e0+3.37134e-2*eng-5.01711e-3*std::pow(eng,2)+3.58761e-4*std::pow(eng,3)-2.17959e-5*std::pow(eng,4)+5.10834e-7*std::pow(eng,5); |
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108 | cpnu=cpnu+pnu[3]; |
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109 | if (r <= cpnu) return 3; |
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110 | |
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111 | if (eng <= 5) pnu[4]=0.111176e0+1.66321e-2*eng+2.56307e-3*std::pow(eng,2)-2.17754e-4*std::pow(eng,3)-5.96667e-6*std::pow(eng,4)+7.44167e-7*std::pow(eng,5); |
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112 | if (eng > 5 && eng <= 10) pnu[4]=0.107859e0+1.88862e-2*eng+2.07521e-3*std::pow(eng,2)-2.08099e-4*std::pow(eng,3)+3.23745e-6*std::pow(eng,4)-1.24999e-7*std::pow(eng,5); |
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113 | cpnu=cpnu+pnu[4]; |
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114 | if (r <= cpnu) return 4; |
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115 | |
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116 | if (eng <= 5.0) pnu[5]=0.0312261e0+4.12932e-3*eng+9.18413e-4*std::pow(eng,2)+4.36542e-5*std::pow(eng,3)-5.9125e-6*std::pow(eng,4)+3.20833e-7*std::pow(eng,5); |
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117 | if (eng > 5 && eng <= 10) pnu[5]=0.0324008e0+3.04772e-3*eng+1.3327e-3*std::pow(eng,2)-3.96916e-5*std::pow(eng,3)+2.94583e-6*std::pow(eng,4)-7.66666e-8*std::pow(eng,5); |
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118 | cpnu=cpnu+pnu[5]; |
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119 | if (r <= cpnu) return 5; |
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120 | |
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121 | if (eng <= 5.0) pnu[6]=5.9347e-3+9.80023e-4*eng+4.24667e-4*std::pow(eng,2)+3.04458e-5*std::pow(eng,3)-6.46667e-6*std::pow(eng,4)+4.30833e-7*std::pow(eng,5); |
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122 | if (eng > 5 && eng <= 10) pnu[6]=6.5421e-3+3.07834e-4*eng+7.39454e-4*std::pow(eng,2)-4.70459e-5*std::pow(eng,3)+3.44583e-6*std::pow(eng,4)-8.91667e-8*std::pow(eng,5); |
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123 | cpnu=cpnu+pnu[6]; |
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124 | if (r <= cpnu) return 6; |
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125 | |
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126 | if (eng <= 5.0) pnu[7]=5.436e-4+1.3756e-4*eng-5.0e-7*std::pow(eng,2)+1.35917e-5*std::pow(eng,3)+5.0e-7*std::pow(eng,4)-5.16667e-8*std::pow(eng,5); |
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127 | if (eng > 5 && eng <= 10) pnu[7]=9.212e-4-1.57585e-4*eng+8.41126e-5*std::pow(eng,2)+4.14166e-6*std::pow(eng,3)+5.37501e-7*std::pow(eng,4)-6.66668e-9*std::pow(eng,5); |
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128 | cpnu=cpnu+pnu[7]; |
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129 | if (r <= cpnu) return 7; |
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130 | else return 8; |
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131 | } |
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