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Redistributions of source code must retain the above copyright notice, 00033 // this list of conditions and the following disclaimer. 00034 // 2. Redistributions in binary form must reproduce the above copyright notice, 00035 // this list of conditions and the following disclaimer in the documentation 00036 // and/or other materials provided with the distribution. 00037 // 3. The name of the author may not be used to endorse or promote products 00038 // derived from this software without specific prior written permission. 00039 // 00040 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00041 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00042 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 00043 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00044 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00045 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 00046 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 00047 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 00048 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 00049 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00050 // 00051 // Copyright (c) 2006 The Regents of the University of California. 00052 // All rights reserved. 00053 // UCRL-CODE-224807 00054 // 00055 // 00056 // $Id: G4SmpNuDistDataPu239_241_MC.cc 69860 2013-05-16 14:39:02Z gcosmo $ 00057 // 00058 00059 #include <cmath> 00060 #include "G4fissionEvent.hh" 00061 00062 G4int G4fissionEvent::G4SmpNuDistDataPu239_241_MC(G4double nubar) { 00063 00064 /* 00065 Description 00066 Sample Number of Neutrons from fission in Pu-239 and Pu-241 using 00067 Zucker and Holden's tabulated data for Pu-239 00068 The 11 P(nu) distributions are given as a function of nubar, 00069 the average number of neutrons from induced fission for the 00070 11 different energies (0 to 10 MeV), based on the Pu-239 data 00071 from Zucker and Holden. 00072 */ 00073 00074 /* 00075 Input 00076 nubar - average number of neutrons per fission 00077 Output 00078 G4SmpNuDistDataPu239_241_MC - sampled multiplicity 00079 00080 */ 00081 00082 static G4double Pu239nu [11] [9] = { 00083 {.0108826, .0994916, .2748898, .3269196, .2046061, .0726834, .0097282, .0006301, .0001685}, 00084 {.0084842, .0790030, .2536175, .3289870, .2328111, .0800161, .0155581, .0011760, .0003469}, 00085 {.0062555, .0611921, .2265608, .3260637, .2588354, .0956070, .0224705, .0025946, .0005205}, 00086 {.0045860, .0477879, .1983002, .3184667, .2792811, .1158950, .0301128, .0048471, .0007233}, 00087 {.0032908, .0374390, .1704196, .3071862, .2948565, .1392594, .0386738, .0078701, .0010046}, 00088 {.0022750, .0291416, .1437645, .2928006, .3063902, .1641647, .0484343, .0116151, .0014149}, 00089 {.0014893, .0222369, .1190439, .2756297, .3144908, .1892897, .0597353, .0160828, .0029917}, 00090 {.0009061, .0163528, .0968110, .2558524, .3194566, .2134888, .0729739, .0213339, .0020017}, 00091 {.0004647, .0113283, .0775201, .2335926, .3213289, .2356614, .0886183, .0274895, .0039531}, 00092 {.0002800, .0071460, .0615577, .2089810, .3200121, .2545846, .1072344, .0347255, .0054786}, 00093 {.0002064, .0038856, .0492548, .1822078, .3154159, .2687282, .1295143, .0432654, .0075217} 00094 }; 00095 static G4double Pu239nubar [11] = { 00096 2.8760000, 00097 3.0088800, 00098 3.1628300, 00099 3.3167800, 00100 3.4707300, 00101 3.6246800, 00102 3.7786300, 00103 3.9325800, 00104 4.0865300, 00105 4.2404900, 00106 4.3944400 00107 }; 00108 G4double fraction, r, cum; 00109 G4int engind, nu; 00110 00111 /* 00112 Check if nubar is within the range of experimental values 00113 */ 00114 if(nubar >= Pu239nubar[0] && nubar <= Pu239nubar[10]) { 00115 /* 00116 Use Zucker and Holden Data 00117 */ 00118 engind = 1; 00119 while (nubar > Pu239nubar[engind]){ engind++;} 00120 fraction = (nubar-Pu239nubar[engind-1])/(Pu239nubar[engind]-Pu239nubar[engind-1]); 00121 if(fisslibrng() > fraction) engind--; 00122 00123 r = fisslibrng(); 00124 nu = 0; 00125 cum = Pu239nu[engind][0]; 00126 while (r > cum && nu < 8){ 00127 nu++; 00128 cum += Pu239nu[engind][nu]; 00129 } 00130 return nu; 00131 } else { 00132 /* 00133 Use Terrell's formula 00134 */ 00135 return (G4int) G4SmpTerrell(nubar); 00136 } 00137 }