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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: G4SmpNuDistDataU232_234_236_238_MC.cc 69860 2013-05-16 14:39:02Z gcosmo $ 00057 // 00058 00059 #include <cmath> 00060 #include "G4fissionEvent.hh" 00061 00062 G4int G4fissionEvent::G4SmpNuDistDataU232_234_236_238_MC(G4double nubar) { 00063 00064 /* 00065 Description 00066 Sample Number of Neutrons from fission in U-232, U-234, U-236, 00067 and U-238 using Zucker and Holden's tabulated data for U-238 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 U-238 data 00071 from Zucker and Holden. 00072 */ 00073 00074 /* 00075 Input 00076 nubar - average number of neutrons per fission 00077 Output 00078 G4SmpNuDistDataU232_234_236_238_MC - sampled multiplicity 00079 00080 */ 00081 00082 static G4double U238nu [11] [9] = { 00083 {.0396484, .2529541, .2939544, .2644470, .1111758, .0312261, .0059347, .0005436, .0001158}, 00084 {.0299076, .2043215, .2995886, .2914889, .1301480, .0363119, .0073638, .0006947, .0001751}, 00085 {.0226651, .1624020, .2957263, .3119098, .1528786, .0434233, .0097473, .0009318, .0003159}, 00086 {.0170253, .1272992, .2840540, .3260192, .1779579, .0526575, .0130997, .0013467, .0005405}, 00087 {.0124932, .0984797, .2661875, .3344938, .2040116, .0640468, .0173837, .0020308, .0008730}, 00088 {.0088167, .0751744, .2436570, .3379711, .2297901, .0775971, .0225619, .0030689, .0013626}, 00089 {.0058736, .0565985, .2179252, .3368863, .2541575, .0933127, .0286200, .0045431, .0031316}, 00090 {.0035997, .0420460, .1904095, .3314575, .2760413, .1112075, .0355683, .0065387, .0031316}, 00091 {.0019495, .0309087, .1625055, .3217392, .2943792, .1313074, .0434347, .0091474, .0046284}, 00092 {.0008767, .0226587, .1356058, .3076919, .3080816, .1536446, .0522549, .0124682, .0067176}, 00093 {.0003271, .0168184, .1111114, .2892434, .3160166, .1782484, .0620617, .0166066, .0095665} 00094 }; 00095 static G4double U238nubar [11] = { 00096 2.2753781, 00097 2.4305631, 00098 2.5857481, 00099 2.7409331, 00100 2.8961181, 00101 3.0513031, 00102 3.2064881, 00103 3.3616731, 00104 3.5168581, 00105 3.6720432, 00106 3.8272281 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 >= U238nubar[0] && nubar <= U238nubar[10]) { 00115 /* 00116 Use Zucker and Holden Data 00117 */ 00118 engind = 1; 00119 while (nubar > U238nubar[engind]){ engind++;} 00120 fraction = (nubar-U238nubar[engind-1])/(U238nubar[engind]-U238nubar[engind-1]); 00121 if(fisslibrng() > fraction) engind--; 00122 00123 r = fisslibrng(); 00124 nu = 0; 00125 cum = U238nu[engind][0]; 00126 while (r > cum && nu < 8){ 00127 nu++; 00128 cum += U238nu[engind][nu]; 00129 } 00130 return nu; 00131 } else { 00132 /* 00133 Use Terrell's formula 00134 */ 00135 return (G4int) G4SmpTerrell(nubar); 00136 } 00137 }