[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: G4SmpSpNugDistData.cc,v 1.1 2007/05/30 01:00:12 dennis Exp $ |
---|
| 57 | // |
---|
| 58 | |
---|
| 59 | #include "G4fissionEvent.hh" |
---|
| 60 | |
---|
| 61 | #define nSPfissg 30 |
---|
| 62 | |
---|
| 63 | G4int G4fissionEvent::G4SmpSpNugDistData(G4int isotope) { |
---|
| 64 | |
---|
| 65 | /* |
---|
| 66 | Description |
---|
| 67 | Sample Number of Photons from spontaneous fission in |
---|
| 68 | (a) Cf-252 using the double Poisson model from Brunson; |
---|
| 69 | (b) Th-232, |
---|
| 70 | U-232, U-233, U-234, U-235, U-236, U-238*, |
---|
| 71 | Np-237, |
---|
| 72 | Pu-238*, Pu-239, Pu-240*, Pu-241, Pu-242*, |
---|
| 73 | Am-241, |
---|
| 74 | Cm-242*, Cm-244*, |
---|
| 75 | Bk-249 |
---|
| 76 | using the negative binomial distribution based on the |
---|
| 77 | spontaneous fission neutron nubar from Ensslin's |
---|
| 78 | tabulated data or Holden and Zucker's tabulated data |
---|
| 79 | (for isotopes denoted with asterix *). |
---|
| 80 | */ |
---|
| 81 | |
---|
| 82 | /* |
---|
| 83 | Input |
---|
| 84 | iso - isotope |
---|
| 85 | Output |
---|
| 86 | G4SmpSpNugDistData - sampled multiplicity |
---|
| 87 | -1 if there is no multiplicity data for that isotope |
---|
| 88 | */ |
---|
| 89 | |
---|
| 90 | G4int i; |
---|
| 91 | G4double sum, nubar; |
---|
| 92 | G4double r; |
---|
| 93 | |
---|
| 94 | static G4double Cf252spdist [nSPfissg] = { |
---|
| 95 | 5.162699e-4,3.742057e-3,1.360482e-2,3.312786e-2,6.090540e-2, |
---|
| 96 | 9.043537e-2,1.133984e-1,1.240985e-1,1.216759e-1,1.092255e-1, |
---|
| 97 | 9.137106e-2,7.219960e-2,5.438060e-2,3.923091e-2,2.714690e-2, |
---|
| 98 | 1.800781e-2,1.143520e-2,6.942099e-3,4.025720e-3,2.229510e-3, |
---|
| 99 | 1.179602e-3,5.966936e-4,2.888766e-4,1.340137e-4,5.965291e-5, |
---|
| 100 | 2.551191e-5,1.049692e-5,4.160575e-6,1.590596e-6,0.000000e+0 |
---|
| 101 | }; |
---|
| 102 | |
---|
| 103 | /* |
---|
| 104 | sample the spontaneous fission photon number distribution |
---|
| 105 | */ |
---|
| 106 | nubar=0.; |
---|
| 107 | if (isotope == 98252) { |
---|
| 108 | // Cf-252 using the G4double Poisson model from Brunson; |
---|
| 109 | r=fisslibrng(); |
---|
| 110 | |
---|
| 111 | sum=0.; |
---|
| 112 | for(i=0; i<nSPfissg; i++) { |
---|
| 113 | sum=sum+Cf252spdist[i]; |
---|
| 114 | if (r <= sum || Cf252spdist[i+1] == 0.) return i; |
---|
| 115 | } |
---|
| 116 | } else if (isotope == 92238) { |
---|
| 117 | /* |
---|
| 118 | using the spontaneous fission nubar from |
---|
| 119 | Holden and Zucker's tabulated data |
---|
| 120 | */ |
---|
| 121 | nubar = 1.9900002; |
---|
| 122 | } else if (isotope == 94240) { |
---|
| 123 | nubar = 2.1540006; |
---|
| 124 | } else if (isotope == 94242) { |
---|
| 125 | nubar = 2.1489998; |
---|
| 126 | } else if (isotope == 96242) { |
---|
| 127 | nubar = 2.54; |
---|
| 128 | } else if (isotope == 96244) { |
---|
| 129 | nubar = 2.7200005; |
---|
| 130 | } else if (isotope == 94238) { |
---|
| 131 | nubar = 2.2100301; |
---|
| 132 | } |
---|
| 133 | |
---|
| 134 | if (nubar != 0.) { |
---|
| 135 | return G4SmpNugDist(isotope, nubar); |
---|
| 136 | } else { |
---|
| 137 | /* |
---|
| 138 | using the spontaneous fission nubar from |
---|
| 139 | N. Ensslin, et.al., "Application Guide to Neutron |
---|
| 140 | Multiplicity Counting," LA-13422-M (November 1998) |
---|
| 141 | */ |
---|
| 142 | nubar = G4SmpSpNubarData(isotope); |
---|
| 143 | if (nubar != -1.) { |
---|
| 144 | return G4SmpNugDist(isotope, nubar); |
---|
| 145 | } else { |
---|
| 146 | // There is no nubar information for that isotope, return -1, |
---|
| 147 | // meaning no data available for that isotope |
---|
| 148 | return -1; |
---|
| 149 | } |
---|
| 150 | } |
---|
| 151 | } |
---|