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