Gabriele Cosmo
139 lines
5.7 KiB
C++
139 lines
5.7 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// This software was developed by Lawrence Livermore National Laboratory.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// 3. The name of the author may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Copyright (c) 2006 The Regents of the University of California.
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// All rights reserved.
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// UCRL-CODE-224807
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//
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//
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//
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#include <cmath>
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#include "G4fissionEvent.hh"
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G4int G4fissionEvent::G4SmpNuDistDataU233_235_MC(G4double nubar) {
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/*
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Description
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Sample Number of Neutrons from fission in U-233 and U-235 using
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Zucker and Holden's tabulated data for U-235
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The 11 P(nu) distributions are given as a function of nubar,
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the average number of neutrons from induced fission for the
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11 different energies (0 to 10 MeV), based on the U-235 data
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from Zucker and Holden.
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*/
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/*
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Input
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nubar - average number of neutrons per fission
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Output
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G4SmpNuDistDataU233_235_MC - sampled multiplicity
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*/
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static G4double U235nu [11] [8] = {
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{.0317223, .1717071, .3361991, .3039695, .1269459, .0266793, .0026322, .0001449},
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{.0237898, .1555525, .3216515, .3150433, .1444732, .0356013, .0034339, .0004546},
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{.0183989, .1384891, .3062123, .3217566, .1628673, .0455972, .0055694, .0011093},
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{.0141460, .1194839, .2883075, .3266568, .1836014, .0569113, .0089426, .0019504},
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{.0115208, .1032624, .2716849, .3283426, .2021206, .0674456, .0128924, .0027307},
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{.0078498, .0802010, .2456595, .3308175, .2291646, .0836912, .0187016, .0039148},
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{.0046272, .0563321, .2132296, .3290407, .2599806, .1045974, .0265604, .0056322},
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{.0024659, .0360957, .1788634, .3210507, .2892537, .1282576, .0360887, .0079244},
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{.0012702, .0216090, .1472227, .3083032, .3123950, .1522540, .0462449, .0107009},
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{.0007288, .0134879, .1231200, .2949390, .3258251, .1731879, .0551737, .0135376},
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{.0004373, .0080115, .1002329, .2779283, .3342611, .1966100, .0650090, .0175099}
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};
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static G4double U235nubar [11] = {
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2.4140000,
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2.5236700,
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2.6368200,
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2.7623400,
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2.8738400,
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3.0386999,
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3.2316099,
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3.4272800,
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3.6041900,
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3.7395900,
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3.8749800
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};
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G4double fraction, r, cum;
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G4int engind, nu;
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/*
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Check if nubar is within the range of experimental values
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*/
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if(nubar >= U235nubar[0] && nubar <= U235nubar[10]) {
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/*
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Use Zucker and Holden Data
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*/
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engind = 1;
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while (nubar > U235nubar[engind]){ engind++;}
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// Loop checking, 11.03.2015, T. Koi
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fraction = (nubar-U235nubar[engind-1])/(U235nubar[engind]-U235nubar[engind-1]);
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if(fisslibrng() > fraction) engind--;
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r = fisslibrng();
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nu = 0;
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cum = U235nu[engind][0];
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while (r > cum && nu < 7){
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// Loop checking, 11.03.2015, T. Koi
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nu++;
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cum += U235nu[engind][nu];
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}
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return nu;
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} else {
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/*
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Use Terrell's formula
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*/
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return (G4int) G4SmpTerrell(nubar);
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}
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}
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