Gabriele Cosmo
139 lines
5.8 KiB
C++
139 lines
5.8 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::G4SmpNuDistDataPu239_241_MC(G4double nubar) {
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/*
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Description
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Sample Number of Neutrons from fission in Pu-239 and Pu-241 using
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Zucker and Holden's tabulated data for Pu-239
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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 Pu-239 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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G4SmpNuDistDataPu239_241_MC - sampled multiplicity
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*/
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static G4double Pu239nu [11] [9] = {
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{.0108826, .0994916, .2748898, .3269196, .2046061, .0726834, .0097282, .0006301, .0001685},
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{.0084842, .0790030, .2536175, .3289870, .2328111, .0800161, .0155581, .0011760, .0003469},
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{.0062555, .0611921, .2265608, .3260637, .2588354, .0956070, .0224705, .0025946, .0005205},
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{.0045860, .0477879, .1983002, .3184667, .2792811, .1158950, .0301128, .0048471, .0007233},
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{.0032908, .0374390, .1704196, .3071862, .2948565, .1392594, .0386738, .0078701, .0010046},
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{.0022750, .0291416, .1437645, .2928006, .3063902, .1641647, .0484343, .0116151, .0014149},
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{.0014893, .0222369, .1190439, .2756297, .3144908, .1892897, .0597353, .0160828, .0029917},
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{.0009061, .0163528, .0968110, .2558524, .3194566, .2134888, .0729739, .0213339, .0020017},
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{.0004647, .0113283, .0775201, .2335926, .3213289, .2356614, .0886183, .0274895, .0039531},
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{.0002800, .0071460, .0615577, .2089810, .3200121, .2545846, .1072344, .0347255, .0054786},
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{.0002064, .0038856, .0492548, .1822078, .3154159, .2687282, .1295143, .0432654, .0075217}
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};
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static G4double Pu239nubar [11] = {
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2.8760000,
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3.0088800,
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3.1628300,
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3.3167800,
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3.4707300,
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3.6246800,
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3.7786300,
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3.9325800,
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4.0865300,
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4.2404900,
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4.3944400
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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 >= Pu239nubar[0] && nubar <= Pu239nubar[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 > Pu239nubar[engind]){ engind++;}
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// Loop checking, 11.03.2015, T. Koi
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fraction = (nubar-Pu239nubar[engind-1])/(Pu239nubar[engind]-Pu239nubar[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 = Pu239nu[engind][0];
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while (r > cum && nu < 8){
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// Loop checking, 11.03.2015, T. Koi
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nu++;
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cum += Pu239nu[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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