[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: 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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