| 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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