[819] | 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: G4SmpNuDistDataPu239.cc,v 1.3 2007/06/01 18:30:38 dennis 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::G4SmpNuDistDataPu239(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 Pu-239 using |
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| 67 | Zucker and Holden's tabulated data for Pu-239 |
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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 | G4SmpNuDistDataPu239 - 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[8] = {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 | /* |
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| 92 | Pu-239 nu distribution |
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| 93 | */ |
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| 94 | if (eng <= 5.0) pnu[0] = 0.0108826e0 - 0.00207694e0*eng |
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| 95 | - 6.5e-4*std::pow(eng,2) + 4.023e-4*std::pow(eng,3) |
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| 96 | - 7.93e-5*std::pow(eng,4) + 5.53666667e-6*std::pow(eng,5); |
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| 97 | if (eng > 5 && eng <= 10) pnu[0] = 0.078606e0 - 5.17531e-2*eng |
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| 98 | + 1.42034e-2*std::pow(eng,2) - 1.96292e-3*std::pow(eng,3) |
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| 99 | + 1.34512e-4*std::pow(eng,4) - 3.63416e-6*std::pow(eng,5); |
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| 100 | if (r <= pnu[0]) return 0; |
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| 101 | |
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| 102 | |
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| 103 | if (eng <= 5.0) pnu[1] = 0.0994916e0 - 0.01979542e0*eng |
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| 104 | - 0.00236583e0*std::pow(eng,2) + 0.0020581e0*std::pow(eng,3) |
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| 105 | - 4.14016667e-4*std::pow(eng,4) + 2.85666667e-5*std::pow(eng,5); |
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| 106 | if (eng > 5 && eng <= 10) pnu[1] = 0.10052e0 - 2.61361e-2*eng |
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| 107 | + 3.78355e-3*std::pow(eng,2) - 3.70667e-4*std::pow(eng,3) |
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| 108 | + 1.95458e-5*std::pow(eng,4) - 3.87499e-7*std::pow(eng,5); |
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| 109 | cpnu=pnu[0]+pnu[1]; |
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| 110 | if (r <= cpnu) return 1; |
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| 111 | |
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| 112 | |
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| 113 | if (eng <= 5.0) pnu[2] = 0.2748898e0 - 0.01565248e0*eng |
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| 114 | - 0.00749681e0*std::pow(eng,2) + 0.00217121e0*std::pow(eng,3) |
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| 115 | - 3.13041667e-4*std::pow(eng,4) + 1.88183333e-5*std::pow(eng,5); |
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| 116 | if (eng > 5 && eng <= 10) pnu[2] = 0.282487e0 - 0.0261342e0*eng |
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| 117 | - 1.16895e-3*std::pow(eng,2) + 1.9888e-4*std::pow(eng,3) |
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| 118 | - 6.41257e-6*std::pow(eng,4) + 1.02502e-7*std::pow(eng,5); |
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| 119 | cpnu=cpnu+pnu[2]; |
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| 120 | if (r <= cpnu) return 2; |
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| 121 | |
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| 122 | if (eng <= 5.0) pnu[3] = 0.3269196e0 + 0.00428312e0*eng |
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| 123 | - 0.00189322e0*std::pow(eng,2) - 4.31925001e-4*std::pow(eng,3) |
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| 124 | + 1.18466667e-4*std::pow(eng,4) - 9.04166668e-6*std::pow(eng,5); |
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| 125 | if (eng > 5 && eng <= 10) pnu[3] = 0.329058e0 + 4.023e-3*eng |
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| 126 | - 3.06402e-3*std::pow(eng,2) + 2.2628e-4*std::pow(eng,3) |
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| 127 | - 1.50875e-5*std::pow(eng,4) + 4.39168e-7*std::pow(eng,5); |
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| 128 | cpnu=cpnu+pnu[3]; |
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| 129 | if (r <= cpnu) return 3; |
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| 130 | |
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| 131 | if (eng <= 5.0) pnu[4] = 0.2046061e0 + 0.02633899e0*eng |
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| 132 | + 0.0041514e0*std::pow(eng,2) - 0.00275542e0*std::pow(eng,3) |
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| 133 | + 5.0325e-4*std::pow(eng,4) - 3.32158333e-5*std::pow(eng,5); |
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| 134 | if (eng > 5 && eng <= 10) pnu[4] = 0.18992e0 + 4.55188e-2*eng |
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| 135 | - 7.06316e-3*std::pow(eng,2) + 7.29916e-4*std::pow(eng,3) |
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| 136 | - 4.71791e-5*std::pow(eng,4) + 1.185e-6*std::pow(eng,5); |
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| 137 | cpnu=cpnu+pnu[4]; |
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| 138 | if (r <= cpnu) return 4; |
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| 139 | |
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| 140 | if (eng <= 5.0) pnu[5] = 0.0726834e0 + 0.00116043e0*eng |
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| 141 | + 0.007572e0*std::pow(eng,2) - 0.00161972e0*std::pow(eng,3) |
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| 142 | + 2.3545e-4*std::pow(eng,4) - 1.546e-5*std::pow(eng,5); |
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| 143 | if (eng > 5 && eng <= 10) pnu[5] = 0.0779212e0 - 1.35849e-3*eng |
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| 144 | + 6.68583e-3*std::pow(eng,2) - 7.98649e-4*std::pow(eng,3) |
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| 145 | + 4.88625e-5*std::pow(eng,4) - 1.54167e-6*std::pow(eng,5); |
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| 146 | cpnu=cpnu+pnu[5]; |
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| 147 | if (r <= cpnu) return 5; |
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| 148 | |
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| 149 | if (eng <= 5.0) pnu[6] = 0.0097282e0 + 0.00494589e0*eng |
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| 150 | + 0.00115294e0*std::pow(eng,2) - 3.25191667e-4*std::pow(eng,3) |
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| 151 | + 6.00083333e-5*std::pow(eng,4) - 3.745e-6*std::pow(eng,5); |
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| 152 | if (eng > 5 && eng <= 10) pnu[6] = 7.85432e-3 + 7.33182e-3*eng |
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| 153 | - 2.03705e-4*std::pow(eng,2) + 8.73787e-5*std::pow(eng,3) |
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| 154 | - 4.24164e-6*std::pow(eng,4) + 2.37499e-7*std::pow(eng,5); |
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| 155 | cpnu=cpnu+pnu[6]; |
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| 156 | if (r <= cpnu) return 6; |
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| 157 | |
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| 158 | if (eng <= 5.0) pnu[7] = 6.301e-4 + 1.10666667e-4*eng |
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| 159 | + 4.28016667e-4*std::pow(eng,2) + 1.12041667e-5*std::pow(eng,3) |
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| 160 | - 4.31666667e-6*std::pow(eng,4) + 3.29166667e-7*std::pow(eng,5); |
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| 161 | if (eng > 5 && eng <= 10) pnu[7] = 1.5323e-3 - 7.91857e-4*eng |
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| 162 | + 8.01017e-4*std::pow(eng,2) - 6.82833e-5*std::pow(eng,3) |
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| 163 | + 4.38333e-6*std::pow(eng,4) - 6.0e-8*std::pow(eng,5); |
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| 164 | cpnu=cpnu+pnu[7]; |
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| 165 | if (r <= cpnu) return 7; |
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| 166 | else return 8; |
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| 167 | } |
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