ENTRY 10635 20190722 145410635 0 1 SUBENT 10635001 20190722 145410635 1 1 BIB 12 40 10635 1 2 TITLE Measurement of the uranium-238 to uranium-235 fission 10635 1 3 cross-section ratio between 0.1 and 25 MeV 10635 1 4 AUTHOR (F.C.Difilippo, R.B.Perez, G.de Saussure, D.K.Olsen, 10635 1 5 R.W.Ingle) 10635 1 6 INSTITUTE (1USAORL) 10635 1 7 REFERENCE (J,NSE,68,43,1978) 10635 1 8 (C,76ANL,,114,1976) Prelim. data above 2 MeV in table 10635 1 9 FACILITY (LINAC,1USAORL) ORELA 10635 1 10 INC-SOURCE (PHOTO) 10635 1 11 DETECTOR (FISCH) 10635 1 12 Ten-section large fission chamber has first 8 Al plates10635 1 13 coated with 238U (less than 2-ppm impurities) and 10635 1 14 last 2 plates coated with 235U (less than 0.12% 10635 1 15 impurities). Only the counting rates from the last 10635 1 16 238U plate and first 235U plate were utilized. 10635 1 17 Three-section small fission chamber was uesd for 10635 1 18 normalization. The inner section is mixture of 238U 10635 1 19 and 235U sandwiched between sections of high purity 10635 1 20 235U coatings. 10635 1 21 METHOD (TOF) Chamber at 40 m station of flight path #6. 10635 1 22 Pulse width was 5 ns and repetition rate was 10635 1 23 800 pulse/sec. 10635 1 24 Background minimized by collimation of beam and cadmium10635 1 25 shield surrounding chamber. 10635 1 26 ANALYSIS Threshold method to obtain the absolute ratio 10635 1 27 CORRECTION Corrected for 10635 1 28 - dead-time, 10635 1 29 - background. 10635 1 30 - neutrons scattered by Al plate. 10635 1 31 Not corrected for 10635 1 32 - isotopic impurities (negligible) 10635 1 33 STATUS (APRVD) Approved by G.de Saussure, 1979/5/22. 10635 1 34 HISTORY (19761001C) 10635 1 35 (19761206R) Corrected data received from ORNL 10635 1 36 (19790416A) Reference update. Converted to REACTION 10635 1 37 Formalism. 10635 1 38 (19840217A) BIB updated, COMMON added. 10635 1 39 (20080812A) BIB update. Error heading updated. 10635 1 40 (20190722A) On. MONITOR and ERR-ANALYS to 002. 10635 1 41 Major rev. in 002. BIB updated. 10635 1 42 ENDBIB 40 0 10635 1 43 NOCOMMON 0 0 10635 1 44 ENDSUBENT 43 0 10635 199999 SUBENT 10635002 20190722 145410635 2 1 BIB 5 17 10635 2 2 REACTION ((92-U-238(N,F),,SIG,,AV)/(92-U-235(N,F),,SIG,,AV)) 10635 2 3 MONITOR ((92-U-238(N,F),,SIG,,AV)/(92-U-235(N,F),,SIG,,AV)) 10635 2 4 ERR-ANALYS The total systematic uncertainty in Table XI of 10635 2 5 Nucl.Sci.Eng.68(1978)43 is the quadrature sum of 10635 2 6 ERR-1, ERR-2 and MONIT-ERR. 10635 2 7 (ERR-S) Absolute statistical error. 10635 2 8 (ERR-1) Effect of scattered neutrons 10635 2 9 (ERR-2) Energy dependence of efficiency ratio 10635 2 10 (MONIT-ERR) Normalization 10635 2 11 STATUS (TABLE) Table X of Nucl.Sci.Eng.68(1978)43 10635 2 12 By G.de Saussure (1979-05-15): 10635 2 13 Data value for 1.01-1.03 MeV should have 0.0135, 10635 2 14 not 0.1135 which is misquoted in Table X of 10635 2 15 Nucl.Sci.Eng.68(1978)43. 10635 2 16 HISTORY (19790416A) Data replaced 10635 2 17 (20190722A) On. MONITOR and ERR-ANALYS from 001. 10635 2 18 ERR-1 and ERR-2 added. EN-MIN:0.1 MEV-> 0.108 MeV 10635 2 19 ENDBIB 17 0 10635 2 20 COMMON 4 3 10635 2 21 EN-NRM-MIN EN-NRM-MAX MONIT MONIT-ERR 10635 2 22 MEV MEV NO-DIM PER-CENT 10635 2 23 2.35 2.95 0.436 1. 10635 2 24 ENDCOMMON 3 0 10635 2 25 DATA 6 149 10635 2 26 EN-MIN EN-MAX DATA ERR-S ERR-1 ERR-2 10635 2 27 MEV MEV NO-DIM NO-DIM PER-CENT PER-CENT 10635 2 28 0.108 0.203 0.751E-04 0.572E-5 3. 1. 10635 2 29 0.203 0.306 0.709E-04 0.571E-5 3. 1. 10635 2 30 0.306 0.391 0.145E-03 0.883E-5 3. 1. 10635 2 31 0.391 0.446 0.221E-03 0.139E-4 3. 1. 10635 2 32 0.446 0.515 0.312E-03 0.144E-4 3. 1. 10635 2 33 0.515 0.556 0.460E-03 0.242E-4 3. 1. 10635 2 34 0.556 0.601 0.629E-03 0.268E-4 3. 1. 10635 2 35 0.601 0.652 0.906E-03 0.323E-4 3. 1. 10635 2 36 0.652 0.710 0.141E-02 0.372E-4 3. 1. 10635 2 37 0.710 0.742 0.190E-02 0.593E-4 3. 1. 10635 2 38 0.742 0.776 0.260E-02 0.676E-4 3. 1. 10635 2 39 0.776 0.813 0.399E-02 0.847E-4 3. 1. 10635 2 40 0.813 0.852 0.499E-02 0.943E-4 3. 1. 10635 2 41 0.852 0.863 0.686E-02 0.220E-3 3. 1. 10635 2 42 0.863 0.873 0.762E-02 0.214E-3 3. 1. 10635 2 43 0.873 0.884 0.104E-01 0.263E-3 3. 1. 10635 2 44 0.884 0.895 0.131E-01 0.290E-3 3. 1. 10635 2 45 0.895 0.906 0.128E-01 0.281E-3 3. 1. 10635 2 46 0.906 0.917 0.124E-01 0.260E-3 3. 1. 10635 2 47 0.917 0.928 0.141E-01 0.293E-3 3. 1. 10635 2 48 0.928 0.940 0.146E-01 0.294E-3 3. 1. 10635 2 49 0.940 0.952 0.153E-01 0.312E-3 3. 1. 10635 2 50 0.952 0.964 0.129E-01 0.264E-3 3. 1. 10635 2 51 0.964 0.976 0.137E-01 0.287E-3 3. 1. 10635 2 52 0.976 0.989 0.140E-01 0.292E-3 3. 1. 10635 2 53 0.989 1.00 0.148E-01 0.295E-3 3. 1. 10635 2 54 1.00 1.01 0.143E-01 0.292E-3 3. 1. 10635 2 55 1.01 1.03 0.135E-01 0.272E-3 3. 1. 10635 2 56 1.03 1.04 0.144E-01 0.292E-3 3. 1. 10635 2 57 1.04 1.06 0.164E-01 0.311E-3 3. 1. 10635 2 58 1.06 1.07 0.185E-01 0.324E-3 3. 1. 10635 2 59 1.07 1.08 0.199E-01 0.314E-3 3. 1. 10635 2 60 1.08 1.10 0.226E-01 0.363E-3 3. 1. 10635 2 61 1.10 1.11 0.253E-01 0.386E-3 3. 1. 10635 2 62 1.11 1.13 0.284E-01 0.413E-3 3. 1. 10635 2 63 1.13 1.15 0.292E-01 0.395E-3 3. 1. 10635 2 64 1.15 1.16 0.353E-01 0.464E-3 3. 1. 10635 2 65 1.16 1.18 0.362E-01 0.463E-3 3. 1. 10635 2 66 1.18 1.19 0.363E-01 0.458E-3 3. 1. 10635 2 67 1.19 1.21 0.359E-01 0.425E-3 3. 1. 10635 2 68 1.21 1.23 0.340E-01 0.438E-3 3. 1. 10635 2 69 1.23 1.25 0.348E-01 0.450E-3 3. 1. 10635 2 70 1.25 1.26 0.400E-01 0.481E-3 3. 1. 10635 2 71 1.26 1.28 0.480E-01 0.536E-3 3. 1. 10635 2 72 1.28 1.30 0.552E-01 0.555E-3 3. 1. 10635 2 73 1.30 1.32 0.662E-01 0.643E-3 3. 1. 10635 2 74 1.32 1.34 0.772E-01 0.690E-3 3. 1. 10635 2 75 1.34 1.36 0.922E-01 0.768E-3 3. 1. 10635 2 76 1.36 1.38 0.116 0.852E-3 3. 1. 10635 2 77 1.38 1.40 0.151 0.105E-2 3. 1. 10635 2 78 1.40 1.43 0.177 0.112E-2 3. 1. 10635 2 79 1.43 1.45 0.218 0.131E-2 3. 1. 10635 2 80 1.45 1.47 0.253 0.139E-2 3. 1. 10635 2 81 1.47 1.49 0.278 0.153E-2 3. 1. 10635 2 82 1.49 1.52 0.289 0.154E-2 3. 1. 10635 2 83 1.52 1.54 0.302 0.163E-2 1. 1. 10635 2 84 1.54 1.57 0.310 0.159E-2 1. 1. 10635 2 85 1.57 1.59 0.328 0.172E-2 1. 1. 10635 2 86 1.59 1.62 0.338 0.175E-2 1. 1. 10635 2 87 1.62 1.65 0.346 0.181E-2 1. 1. 10635 2 88 1.65 1.67 0.345 0.186E-2 1. 1. 10635 2 89 1.67 1.70 0.358 0.186E-2 1. 1. 10635 2 90 1.70 1.73 0.369 0.193E-2 1. 1. 10635 2 91 1.73 1.76 0.377 0.201E-2 1. 1. 10635 2 92 1.76 1.79 0.383 0.191E-2 1. 1. 10635 2 93 1.79 1.82 0.393 0.203E-2 1. 1. 10635 2 94 1.82 1.86 0.404 0.202E-2 1. 1. 10635 2 95 1.86 1.89 0.415 0.213E-2 1. 1. 10635 2 96 1.89 1.92 0.421 0.222E-2 1. 1. 10635 2 97 1.92 1.96 0.419 0.215E-2 1. 1. 10635 2 98 1.96 1.99 0.423 0.218E-2 1. 1. 10635 2 99 1.99 2.03 0.423 0.227E-2 1. 1. 10635 2 100 2.03 2.07 0.424 0.232E-2 1. 1. 10635 2 101 2.07 2.11 0.433 0.229E-2 1. 1. 10635 2 102 2.11 2.15 0.438 0.239E-2 1. 1. 10635 2 103 2.15 2.19 0.438 0.236E-2 1. 1. 10635 2 104 2.19 2.23 0.439 0.243E-2 1. 1. 10635 2 105 2.23 2.28 0.441 0.249E-2 1. 1. 10635 2 106 2.28 2.32 0.438 0.244E-2 1. 1. 10635 2 107 2.32 2.37 0.434 0.243E-2 1. 1. 10635 2 108 2.37 2.41 0.436 0.255E-2 1. 1. 10635 2 109 2.41 2.46 0.437 0.255E-2 1. 1. 10635 2 110 2.46 2.52 0.439 0.257E-2 1. 1. 10635 2 111 2.52 2.57 0.436 0.258E-2 1. 1. 10635 2 112 2.57 2.62 0.439 0.270E-2 1. 1. 10635 2 113 2.62 2.68 0.438 0.275E-2 1. 1. 10635 2 114 2.68 2.74 0.437 0.271E-2 1. 1. 10635 2 115 2.74 2.79 0.434 0.279E-2 1. 1. 10635 2 116 2.79 2.86 0.435 0.285E-2 1. 1. 10635 2 117 2.86 2.92 0.435 0.292E-2 1. 1. 10635 2 118 2.92 2.99 0.428 0.293E-2 1. 1. 10635 2 119 2.99 3.05 0.432 0.279E-2 1. 1. 10635 2 120 3.05 3.12 0.440 0.300E-2 1. 1. 10635 2 121 3.12 3.20 0.435 0.298E-2 1. 1. 10635 2 122 3.20 3.27 0.443 0.309E-2 1. 1. 10635 2 123 3.27 3.35 0.449 0.308E-2 1. 1. 10635 2 124 3.35 3.43 0.453 0.312E-2 1. 1. 10635 2 125 3.43 3.51 0.463 0.328E-2 1. 1. 10635 2 126 3.51 3.60 0.470 0.335E-2 1. 1. 10635 2 127 3.60 3.69 0.477 0.333E-2 1. 1. 10635 2 128 3.69 3.78 0.475 0.334E-2 1. 1. 10635 2 129 3.78 3.88 0.479 0.343E-2 1. 1. 10635 2 130 3.88 3.98 0.489 0.353E-2 1. 1. 10635 2 131 3.98 4.09 0.493 0.348E-2 1. 1. 10635 2 132 4.09 4.20 0.489 0.344E-2 1. 1. 10635 2 133 4.20 4.31 0.492 0.355E-2 1. 1. 10635 2 134 4.31 4.43 0.499 0.366E-2 1. 1. 10635 2 135 4.43 4.55 0.502 0.365E-2 1. 1. 10635 2 136 4.55 4.68 0.501 0.347E-2 1. 1. 10635 2 137 4.68 4.82 0.504 0.365E-2 1. 1. 10635 2 138 4.82 4.96 0.512 0.370E-2 1. 1. 10635 2 139 4.96 5.10 0.513 0.373E-2 1. 1. 10635 2 140 5.10 5.25 0.518 0.358E-2 1. 1. 10635 2 141 5.25 5.41 0.520 0.378E-2 1. 1. 10635 2 142 5.41 5.58 0.529 0.381E-2 1. 1. 10635 2 143 5.58 5.76 0.529 0.377E-2 1. 1. 10635 2 144 5.76 5.94 0.555 0.366E-2 1. 1. 10635 2 145 5.94 6.13 0.561 0.374E-2 1. 1. 10635 2 146 6.13 6.33 0.588 0.373E-2 1. 1. 10635 2 147 6.33 6.55 0.605 0.367E-2 1. 1. 10635 2 148 6.55 6.77 0.622 0.352E-2 1. 2. 10635 2 149 6.77 7.00 0.616 0.337E-2 1. 2. 10635 2 150 7.00 7.25 0.602 0.337E-2 1. 2. 10635 2 151 7.25 7.51 0.593 0.334E-2 1. 2. 10635 2 152 7.51 7.79 0.570 0.323E-2 1. 2. 10635 2 153 7.79 8.08 0.567 0.310E-2 1. 2. 10635 2 154 8.08 8.38 0.570 0.341E-2 1. 1. 10635 2 155 8.38 8.71 0.563 0.350E-2 1. 1. 10635 2 156 8.71 9.05 0.570 0.367E-2 1. 1. 10635 2 157 9.05 9.42 0.575 0.368E-2 1. 1. 10635 2 158 9.42 9.81 0.573 0.408E-2 1. 1. 10635 2 159 9.81 10.2 0.569 0.426E-2 1. 1. 10635 2 160 10.2 10.7 0.572 0.447E-2 1. 1. 10635 2 161 10.7 11.1 0.578 0.451E-2 1. 1. 10635 2 162 11.1 11.6 0.585 0.504E-2 1. 1. 10635 2 163 11.6 12.2 0.560 0.505E-2 1. 1. 10635 2 164 12.2 12.7 0.541 0.502E-2 1. 1. 10635 2 165 12.7 13.3 0.532 0.477E-2 1. 1. 10635 2 166 13.3 14.0 0.534 0.508E-2 1. 1. 10635 2 167 14.0 14.7 0.551 0.531E-2 1. 1. 10635 2 168 14.7 15.5 0.574 0.565E-2 1. 1. 10635 2 169 15.5 16.3 0.598 0.591E-2 1. 1. 10635 2 170 16.3 17.2 0.614 0.638E-2 1. 1. 10635 2 171 17.2 18.2 0.616 0.687E-2 1. 1. 10635 2 172 18.2 19.2 0.652 0.768E-2 1. 1. 10635 2 173 19.2 20.4 0.691 0.848E-2 1. 1. 10635 2 174 20.4 21.7 0.723 0.862E-2 1. 1. 10635 2 175 21.7 23.1 0.746 0.983E-2 1. 1. 10635 2 176 23.1 24.6 0.735 0.102E-1 1. 1. 10635 2 177 ENDDATA 151 0 10635 2 178 ENDSUBENT 177 0 10635 299999 ENDENTRY 2 0 1063599999999