ENTRY 10635 20190722 14541063500000001 SUBENT 10635001 20190722 14541063500100001 BIB 12 40 1063500100002 TITLE Measurement of the uranium-238 to uranium-235 fission 1063500100003 cross-section ratio between 0.1 and 25 MeV 1063500100004 AUTHOR (F.C.Difilippo, R.B.Perez, G.de Saussure, D.K.Olsen, 1063500100005 R.W.Ingle) 1063500100006 INSTITUTE (1USAORL) 1063500100007 REFERENCE (J,NSE,68,43,1978) 1063500100008 (C,76ANL,,114,1976) Prelim. data above 2 MeV in table 1063500100009 FACILITY (LINAC,1USAORL) ORELA 1063500100010 INC-SOURCE (PHOTO) 1063500100011 DETECTOR (FISCH) 1063500100012 Ten-section large fission chamber has first 8 Al plates1063500100013 coated with 238U (less than 2-ppm impurities) and 1063500100014 last 2 plates coated with 235U (less than 0.12% 1063500100015 impurities). Only the counting rates from the last 1063500100016 238U plate and first 235U plate were utilized. 1063500100017 Three-section small fission chamber was uesd for 1063500100018 normalization. The inner section is mixture of 238U 1063500100019 and 235U sandwiched between sections of high purity 1063500100020 235U coatings. 1063500100021 METHOD (TOF) Chamber at 40 m station of flight path #6. 1063500100022 Pulse width was 5 ns and repetition rate was 1063500100023 800 pulse/sec. 1063500100024 Background minimized by collimation of beam and cadmium1063500100025 shield surrounding chamber. 1063500100026 ANALYSIS Threshold method to obtain the absolute ratio 1063500100027 CORRECTION Corrected for 1063500100028 - dead-time, 1063500100029 - background. 1063500100030 - neutrons scattered by Al plate. 1063500100031 Not corrected for 1063500100032 - isotopic impurities (negligible) 1063500100033 STATUS (APRVD) Approved by G.de Saussure, 1979/5/22. 1063500100034 HISTORY (19761001C) 1063500100035 (19761206R) Corrected data received from ORNL 1063500100036 (19790416A) Reference update. Converted to REACTION 1063500100037 Formalism. 1063500100038 (19840217A) BIB updated, COMMON added. 1063500100039 (20080812A) BIB update. Error heading updated. 1063500100040 (20190722A) On. MONITOR and ERR-ANALYS to 002. 1063500100041 Major rev. in 002. BIB updated. 1063500100042 ENDBIB 40 0 1063500100043 NOCOMMON 0 0 1063500100044 ENDSUBENT 43 0 1063500199999 SUBENT 10635002 20190722 14541063500200001 BIB 5 17 1063500200002 REACTION ((92-U-238(N,F),,SIG,,AV)/(92-U-235(N,F),,SIG,,AV)) 1063500200003 MONITOR ((92-U-238(N,F),,SIG,,AV)/(92-U-235(N,F),,SIG,,AV)) 1063500200004 ERR-ANALYS The total systematic uncertainty in Table XI of 1063500200005 Nucl.Sci.Eng.68(1978)43 is the quadrature sum of 1063500200006 ERR-1, ERR-2 and MONIT-ERR. 1063500200007 (ERR-S) Absolute statistical error. 1063500200008 (ERR-1) Effect of scattered neutrons 1063500200009 (ERR-2) Energy dependence of efficiency ratio 1063500200010 (MONIT-ERR) Normalization 1063500200011 STATUS (TABLE) Table X of Nucl.Sci.Eng.68(1978)43 1063500200012 By G.de Saussure (1979-05-15): 1063500200013 Data value for 1.01-1.03 MeV should have 0.0135, 1063500200014 not 0.1135 which is misquoted in Table X of 1063500200015 Nucl.Sci.Eng.68(1978)43. 1063500200016 HISTORY (19790416A) Data replaced 1063500200017 (20190722A) On. MONITOR and ERR-ANALYS from 001. 1063500200018 ERR-1 and ERR-2 added. EN-MIN:0.1 MEV-> 0.108 MeV 1063500200019 ENDBIB 17 0 1063500200020 COMMON 4 3 1063500200021 EN-NRM-MIN EN-NRM-MAX MONIT MONIT-ERR 1063500200022 MEV MEV NO-DIM PER-CENT 1063500200023 2.35 2.95 0.436 1. 1063500200024 ENDCOMMON 3 0 1063500200025 DATA 6 149 1063500200026 EN-MIN EN-MAX DATA ERR-S ERR-1 ERR-2 1063500200027 MEV MEV NO-DIM NO-DIM PER-CENT PER-CENT 1063500200028 0.108 0.203 0.751E-04 0.572E-5 3. 1. 1063500200029 0.203 0.306 0.709E-04 0.571E-5 3. 1. 1063500200030 0.306 0.391 0.145E-03 0.883E-5 3. 1. 1063500200031 0.391 0.446 0.221E-03 0.139E-4 3. 1. 1063500200032 0.446 0.515 0.312E-03 0.144E-4 3. 1. 1063500200033 0.515 0.556 0.460E-03 0.242E-4 3. 1. 1063500200034 0.556 0.601 0.629E-03 0.268E-4 3. 1. 1063500200035 0.601 0.652 0.906E-03 0.323E-4 3. 1. 1063500200036 0.652 0.710 0.141E-02 0.372E-4 3. 1. 1063500200037 0.710 0.742 0.190E-02 0.593E-4 3. 1. 1063500200038 0.742 0.776 0.260E-02 0.676E-4 3. 1. 1063500200039 0.776 0.813 0.399E-02 0.847E-4 3. 1. 1063500200040 0.813 0.852 0.499E-02 0.943E-4 3. 1. 1063500200041 0.852 0.863 0.686E-02 0.220E-3 3. 1. 1063500200042 0.863 0.873 0.762E-02 0.214E-3 3. 1. 1063500200043 0.873 0.884 0.104E-01 0.263E-3 3. 1. 1063500200044 0.884 0.895 0.131E-01 0.290E-3 3. 1. 1063500200045 0.895 0.906 0.128E-01 0.281E-3 3. 1. 1063500200046 0.906 0.917 0.124E-01 0.260E-3 3. 1. 1063500200047 0.917 0.928 0.141E-01 0.293E-3 3. 1. 1063500200048 0.928 0.940 0.146E-01 0.294E-3 3. 1. 1063500200049 0.940 0.952 0.153E-01 0.312E-3 3. 1. 1063500200050 0.952 0.964 0.129E-01 0.264E-3 3. 1. 1063500200051 0.964 0.976 0.137E-01 0.287E-3 3. 1. 1063500200052 0.976 0.989 0.140E-01 0.292E-3 3. 1. 1063500200053 0.989 1.00 0.148E-01 0.295E-3 3. 1. 1063500200054 1.00 1.01 0.143E-01 0.292E-3 3. 1. 1063500200055 1.01 1.03 0.135E-01 0.272E-3 3. 1. 1063500200056 1.03 1.04 0.144E-01 0.292E-3 3. 1. 1063500200057 1.04 1.06 0.164E-01 0.311E-3 3. 1. 1063500200058 1.06 1.07 0.185E-01 0.324E-3 3. 1. 1063500200059 1.07 1.08 0.199E-01 0.314E-3 3. 1. 1063500200060 1.08 1.10 0.226E-01 0.363E-3 3. 1. 1063500200061 1.10 1.11 0.253E-01 0.386E-3 3. 1. 1063500200062 1.11 1.13 0.284E-01 0.413E-3 3. 1. 1063500200063 1.13 1.15 0.292E-01 0.395E-3 3. 1. 1063500200064 1.15 1.16 0.353E-01 0.464E-3 3. 1. 1063500200065 1.16 1.18 0.362E-01 0.463E-3 3. 1. 1063500200066 1.18 1.19 0.363E-01 0.458E-3 3. 1. 1063500200067 1.19 1.21 0.359E-01 0.425E-3 3. 1. 1063500200068 1.21 1.23 0.340E-01 0.438E-3 3. 1. 1063500200069 1.23 1.25 0.348E-01 0.450E-3 3. 1. 1063500200070 1.25 1.26 0.400E-01 0.481E-3 3. 1. 1063500200071 1.26 1.28 0.480E-01 0.536E-3 3. 1. 1063500200072 1.28 1.30 0.552E-01 0.555E-3 3. 1. 1063500200073 1.30 1.32 0.662E-01 0.643E-3 3. 1. 1063500200074 1.32 1.34 0.772E-01 0.690E-3 3. 1. 1063500200075 1.34 1.36 0.922E-01 0.768E-3 3. 1. 1063500200076 1.36 1.38 0.116 0.852E-3 3. 1. 1063500200077 1.38 1.40 0.151 0.105E-2 3. 1. 1063500200078 1.40 1.43 0.177 0.112E-2 3. 1. 1063500200079 1.43 1.45 0.218 0.131E-2 3. 1. 1063500200080 1.45 1.47 0.253 0.139E-2 3. 1. 1063500200081 1.47 1.49 0.278 0.153E-2 3. 1. 1063500200082 1.49 1.52 0.289 0.154E-2 3. 1. 1063500200083 1.52 1.54 0.302 0.163E-2 1. 1. 1063500200084 1.54 1.57 0.310 0.159E-2 1. 1. 1063500200085 1.57 1.59 0.328 0.172E-2 1. 1. 1063500200086 1.59 1.62 0.338 0.175E-2 1. 1. 1063500200087 1.62 1.65 0.346 0.181E-2 1. 1. 1063500200088 1.65 1.67 0.345 0.186E-2 1. 1. 1063500200089 1.67 1.70 0.358 0.186E-2 1. 1. 1063500200090 1.70 1.73 0.369 0.193E-2 1. 1. 1063500200091 1.73 1.76 0.377 0.201E-2 1. 1. 1063500200092 1.76 1.79 0.383 0.191E-2 1. 1. 1063500200093 1.79 1.82 0.393 0.203E-2 1. 1. 1063500200094 1.82 1.86 0.404 0.202E-2 1. 1. 1063500200095 1.86 1.89 0.415 0.213E-2 1. 1. 1063500200096 1.89 1.92 0.421 0.222E-2 1. 1. 1063500200097 1.92 1.96 0.419 0.215E-2 1. 1. 1063500200098 1.96 1.99 0.423 0.218E-2 1. 1. 1063500200099 1.99 2.03 0.423 0.227E-2 1. 1. 1063500200100 2.03 2.07 0.424 0.232E-2 1. 1. 1063500200101 2.07 2.11 0.433 0.229E-2 1. 1. 1063500200102 2.11 2.15 0.438 0.239E-2 1. 1. 1063500200103 2.15 2.19 0.438 0.236E-2 1. 1. 1063500200104 2.19 2.23 0.439 0.243E-2 1. 1. 1063500200105 2.23 2.28 0.441 0.249E-2 1. 1. 1063500200106 2.28 2.32 0.438 0.244E-2 1. 1. 1063500200107 2.32 2.37 0.434 0.243E-2 1. 1. 1063500200108 2.37 2.41 0.436 0.255E-2 1. 1. 1063500200109 2.41 2.46 0.437 0.255E-2 1. 1. 1063500200110 2.46 2.52 0.439 0.257E-2 1. 1. 1063500200111 2.52 2.57 0.436 0.258E-2 1. 1. 1063500200112 2.57 2.62 0.439 0.270E-2 1. 1. 1063500200113 2.62 2.68 0.438 0.275E-2 1. 1. 1063500200114 2.68 2.74 0.437 0.271E-2 1. 1. 1063500200115 2.74 2.79 0.434 0.279E-2 1. 1. 1063500200116 2.79 2.86 0.435 0.285E-2 1. 1. 1063500200117 2.86 2.92 0.435 0.292E-2 1. 1. 1063500200118 2.92 2.99 0.428 0.293E-2 1. 1. 1063500200119 2.99 3.05 0.432 0.279E-2 1. 1. 1063500200120 3.05 3.12 0.440 0.300E-2 1. 1. 1063500200121 3.12 3.20 0.435 0.298E-2 1. 1. 1063500200122 3.20 3.27 0.443 0.309E-2 1. 1. 1063500200123 3.27 3.35 0.449 0.308E-2 1. 1. 1063500200124 3.35 3.43 0.453 0.312E-2 1. 1. 1063500200125 3.43 3.51 0.463 0.328E-2 1. 1. 1063500200126 3.51 3.60 0.470 0.335E-2 1. 1. 1063500200127 3.60 3.69 0.477 0.333E-2 1. 1. 1063500200128 3.69 3.78 0.475 0.334E-2 1. 1. 1063500200129 3.78 3.88 0.479 0.343E-2 1. 1. 1063500200130 3.88 3.98 0.489 0.353E-2 1. 1. 1063500200131 3.98 4.09 0.493 0.348E-2 1. 1. 1063500200132 4.09 4.20 0.489 0.344E-2 1. 1. 1063500200133 4.20 4.31 0.492 0.355E-2 1. 1. 1063500200134 4.31 4.43 0.499 0.366E-2 1. 1. 1063500200135 4.43 4.55 0.502 0.365E-2 1. 1. 1063500200136 4.55 4.68 0.501 0.347E-2 1. 1. 1063500200137 4.68 4.82 0.504 0.365E-2 1. 1. 1063500200138 4.82 4.96 0.512 0.370E-2 1. 1. 1063500200139 4.96 5.10 0.513 0.373E-2 1. 1. 1063500200140 5.10 5.25 0.518 0.358E-2 1. 1. 1063500200141 5.25 5.41 0.520 0.378E-2 1. 1. 1063500200142 5.41 5.58 0.529 0.381E-2 1. 1. 1063500200143 5.58 5.76 0.529 0.377E-2 1. 1. 1063500200144 5.76 5.94 0.555 0.366E-2 1. 1. 1063500200145 5.94 6.13 0.561 0.374E-2 1. 1. 1063500200146 6.13 6.33 0.588 0.373E-2 1. 1. 1063500200147 6.33 6.55 0.605 0.367E-2 1. 1. 1063500200148 6.55 6.77 0.622 0.352E-2 1. 2. 1063500200149 6.77 7.00 0.616 0.337E-2 1. 2. 1063500200150 7.00 7.25 0.602 0.337E-2 1. 2. 1063500200151 7.25 7.51 0.593 0.334E-2 1. 2. 1063500200152 7.51 7.79 0.570 0.323E-2 1. 2. 1063500200153 7.79 8.08 0.567 0.310E-2 1. 2. 1063500200154 8.08 8.38 0.570 0.341E-2 1. 1. 1063500200155 8.38 8.71 0.563 0.350E-2 1. 1. 1063500200156 8.71 9.05 0.570 0.367E-2 1. 1. 1063500200157 9.05 9.42 0.575 0.368E-2 1. 1. 1063500200158 9.42 9.81 0.573 0.408E-2 1. 1. 1063500200159 9.81 10.2 0.569 0.426E-2 1. 1. 1063500200160 10.2 10.7 0.572 0.447E-2 1. 1. 1063500200161 10.7 11.1 0.578 0.451E-2 1. 1. 1063500200162 11.1 11.6 0.585 0.504E-2 1. 1. 1063500200163 11.6 12.2 0.560 0.505E-2 1. 1. 1063500200164 12.2 12.7 0.541 0.502E-2 1. 1. 1063500200165 12.7 13.3 0.532 0.477E-2 1. 1. 1063500200166 13.3 14.0 0.534 0.508E-2 1. 1. 1063500200167 14.0 14.7 0.551 0.531E-2 1. 1. 1063500200168 14.7 15.5 0.574 0.565E-2 1. 1. 1063500200169 15.5 16.3 0.598 0.591E-2 1. 1. 1063500200170 16.3 17.2 0.614 0.638E-2 1. 1. 1063500200171 17.2 18.2 0.616 0.687E-2 1. 1. 1063500200172 18.2 19.2 0.652 0.768E-2 1. 1. 1063500200173 19.2 20.4 0.691 0.848E-2 1. 1. 1063500200174 20.4 21.7 0.723 0.862E-2 1. 1. 1063500200175 21.7 23.1 0.746 0.983E-2 1. 1. 1063500200176 23.1 24.6 0.735 0.102E-1 1. 1. 1063500200177 ENDDATA 151 0 1063500200178 ENDSUBENT 177 0 1063500299999 ENDENTRY 2 0 1063599999999