[819] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
| 26 | // |
---|
| 27 | // This software was developed by Lawrence Livermore National Laboratory. |
---|
| 28 | // |
---|
| 29 | // Redistribution and use in source and binary forms, with or without |
---|
| 30 | // modification, are permitted provided that the following conditions are met: |
---|
| 31 | // |
---|
| 32 | // 1. Redistributions of source code must retain the above copyright notice, |
---|
| 33 | // this list of conditions and the following disclaimer. |
---|
| 34 | // 2. Redistributions in binary form must reproduce the above copyright notice, |
---|
| 35 | // this list of conditions and the following disclaimer in the documentation |
---|
| 36 | // and/or other materials provided with the distribution. |
---|
| 37 | // 3. The name of the author may not be used to endorse or promote products |
---|
| 38 | // derived from this software without specific prior written permission. |
---|
| 39 | // |
---|
| 40 | // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
---|
| 41 | // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
---|
| 42 | // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
---|
| 43 | // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
---|
| 44 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
---|
| 45 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
---|
| 46 | // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
---|
| 47 | // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
---|
| 48 | // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
---|
| 49 | // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
---|
| 50 | // |
---|
| 51 | // Copyright (c) 2006 The Regents of the University of California. |
---|
| 52 | // All rights reserved. |
---|
| 53 | // UCRL-CODE-224807 |
---|
| 54 | // |
---|
| 55 | // |
---|
| 56 | // $Id: G4SmpSpNuDistData.cc,v 1.2 2007/05/30 19:01:32 dennis Exp $ |
---|
| 57 | // |
---|
| 58 | |
---|
| 59 | #include "G4fissionEvent.hh" |
---|
| 60 | |
---|
| 61 | #define nSPfissIso 8 |
---|
| 62 | #define nSPfissn 11 |
---|
| 63 | |
---|
| 64 | G4int G4fissionEvent::G4SmpSpNuDistData(G4int isotope, G4int Cf252option) { |
---|
| 65 | |
---|
| 66 | /* |
---|
| 67 | Description |
---|
| 68 | Sample Number of Neutrons from spontaneous fission |
---|
| 69 | (a) from the neutron multiplicity data for |
---|
| 70 | U-238, Pu-238, Pu-240, Pu-242, Cm-242, Cm-244 |
---|
| 71 | using Holden and Zucker's tabulated data |
---|
| 72 | Cf-252 using either Spencer's tabulated data or |
---|
| 73 | Boldeman's data |
---|
| 74 | (b) from Terrell's approximation using nubar for |
---|
| 75 | Th-232, |
---|
| 76 | U-232, U-233, U-234, U-235, U-236, |
---|
| 77 | Np-237, |
---|
| 78 | Pu-239, Pu-241, |
---|
| 79 | Am-241, |
---|
| 80 | Bk-249 |
---|
| 81 | using Ensslin's data. |
---|
| 82 | */ |
---|
| 83 | |
---|
| 84 | /* |
---|
| 85 | Input |
---|
| 86 | iso - isotope |
---|
| 87 | Cf252option - 0 to use Spencer's tabulated data |
---|
| 88 | 1 to use Boldeman's data |
---|
| 89 | Output |
---|
| 90 | G4SmpSpNuDistData - sampled multiplicity |
---|
| 91 | -1 is the isotope has |
---|
| 92 | no multiplicity data, |
---|
| 93 | nor any nubar data |
---|
| 94 | */ |
---|
| 95 | |
---|
| 96 | G4int i, index; |
---|
| 97 | G4double sum, nubar; |
---|
| 98 | G4double r; |
---|
| 99 | |
---|
| 100 | static G4double sfnu [nSPfissIso][nSPfissn] = { |
---|
| 101 | {0.0481677,0.2485215,0.4253044,0.2284094,0.0423438,0.0072533, |
---|
| 102 | 0.0000000,0.0000000,0.0000000,0.0000000,0.0000000}, |
---|
| 103 | |
---|
| 104 | {0.0631852,0.2319644,0.3333230,0.2528207,0.0986461,0.0180199, |
---|
| 105 | 0.0020407,0.0000000,0.0000000,0.0000000,0.0000000}, |
---|
| 106 | |
---|
| 107 | {0.0679423,0.2293159,0.3341228,0.2475507,0.0996922,0.0182398, |
---|
| 108 | 0.0031364,0.0000000,0.0000000,0.0000000,0.0000000}, |
---|
| 109 | |
---|
| 110 | {0.0212550,0.1467407,0.3267531,0.3268277,0.1375090,0.0373815, |
---|
| 111 | 0.0025912,0.0007551,0.0001867,0.0000000,0.0000000}, |
---|
| 112 | |
---|
| 113 | {0.0150050,0.1161725,0.2998427,0.3331614,0.1837748,0.0429780, |
---|
| 114 | 0.0087914,0.0002744,0.0000000,0.0000000,0.0000000}, |
---|
| 115 | |
---|
| 116 | {0.0540647,0.2053880,0.3802279,0.2248483,0.1078646,0.0276366, |
---|
| 117 | 0.0000000,0.0000000,0.0000000,0.0000000,0.0000000}, |
---|
| 118 | |
---|
| 119 | {0.0021100,0.0246700,0.1229000,0.2714400,0.3076300,0.1877000, |
---|
| 120 | 0.0677000,0.0140600,0.0016700,0.0001000,0.0000000}, |
---|
| 121 | |
---|
| 122 | {0.0020900,0.0262100,0.1262000,0.2752000,0.3018000,0.1846000, |
---|
| 123 | 0.0668000,0.0150000,0.0021000,0.0000000,0.0000000} }; |
---|
| 124 | |
---|
| 125 | /* |
---|
| 126 | sample the spontaneous fission neutron number distribution |
---|
| 127 | */ |
---|
| 128 | index = -1; |
---|
| 129 | |
---|
| 130 | if (isotope == 92238) index = 0; |
---|
| 131 | else if (isotope == 94240) index = 1; |
---|
| 132 | else if (isotope == 94242) index = 2; |
---|
| 133 | else if (isotope == 96242) index = 3; |
---|
| 134 | else if (isotope == 96244) index = 4; |
---|
| 135 | else if (isotope == 94238) index = 5; |
---|
| 136 | else if (isotope == 98252 && Cf252option == 0) index = 6; |
---|
| 137 | else if (isotope == 98252 && Cf252option == 1) index = 7; |
---|
| 138 | |
---|
| 139 | if (index != -1) { |
---|
| 140 | r=fisslibrng(); |
---|
| 141 | |
---|
| 142 | sum=0.; |
---|
| 143 | for(i=0; i<nSPfissn; i++) { |
---|
| 144 | sum=sum+sfnu[index][i]; |
---|
| 145 | if (r <= sum || sfnu[index][i+1] == 0.) return i; |
---|
| 146 | } |
---|
| 147 | // |
---|
| 148 | // Fall through |
---|
| 149 | // |
---|
| 150 | G4cout << " Random number out of range in SmpSpNuDistData " << G4endl; |
---|
| 151 | return -1; |
---|
| 152 | |
---|
| 153 | } else { |
---|
| 154 | // There is no full multiplicity distribution data available |
---|
| 155 | // for that isotope, let's try to find a nubar for it in |
---|
| 156 | // N. Ensslin, et.al., "Application Guide to Neutron |
---|
| 157 | // Multiplicity Counting," LA-13422-M (November 1998) |
---|
| 158 | // and use Terrell's approximation |
---|
| 159 | nubar = G4SmpSpNubarData(isotope); |
---|
| 160 | if (nubar != -1.) { |
---|
| 161 | return (G4int) G4SmpTerrell(nubar); |
---|
| 162 | } else { |
---|
| 163 | // There is no nubar information for that isotope, return -1, |
---|
| 164 | // meaning no data available for that isotope |
---|
| 165 | return -1; |
---|
| 166 | } |
---|
| 167 | } |
---|
| 168 | } |
---|