ENTRY 10236 20190722 14541023600000001 SUBENT 10236001 20190722 14541023600100001 BIB 12 35 1023600100002 TITLE The ratio of the uranium-233 to uranium-235 fission 1023600100003 cross section 1023600100004 AUTHOR (J.W.Meadows) 1023600100005 INSTITUTE (1USAANL) 1023600100006 REFERENCE (J,NSE,54,317,1974) 1023600100007 (R,ANL-NDM-83,1983) Revised data in table 1023600100008 FACILITY (DYNAM,1USAANL) Argonne 8 MeV Tandem Dynamitron 1023600100009 INC-SOURCE (P-LI7) for below En~5 MeV 1023600100010 Targets produced by evaporation of Li on Ta backing. 1023600100011 Target thicknesses about 200 keV above 2 MeV neutron 1023600100012 energy but thinner at lower energies. 1023600100013 (D-D) for above En~5 MeV 1023600100014 Deuterium gas in a 2-cm-long cell filled to 2 atm. 1023600100015 SAMPLE (92-U-233,ENR=0.99540) 1023600100016 (92-U-234,ENR=0.00184) 1023600100017 (92-U-235,ENR=0.00062) 1023600100018 (92-U-236,ENR=0.00013) 1023600100019 (92-U-238,ENR=0.00203) 1023600100020 METHOD Absolute measurements made at energies 1.5 to 3.0 MeV 1023600100021 using average of values obtained from measurements 1023600100022 on 5 sample pairs. 1023600100023 Mass ratios were obtained by comparing thermal fission 1023600100024 rates of 233U and 235U samples and also by comparing 1023600100025 low geometry alpha count rates of 233U samples with 1023600100026 235U samples spiked with 233U. 1023600100027 ANALYSIS Ratio normalized at 1.496, 1.966, 2.495, 2.998 MeV. 1023600100028 DETECTOR (FISCH) Low-mass double ionization chamber using 1023600100029 methane as the counting gas. 1023600100030 STATUS (APRVD) J.W. Meadows, 1984/3/2. 1023600100031 HISTORY (19740307C) 1023600100032 (19750702U) REFERENCE changed 1023600100033 (19821015A) Converted to REACTION formalism 1023600100034 (19840306A) Revised as per ANL-NDM-83. 1023600100035 (20010309U) Updated to new date formats, lower case. 1023600100036 (20190722A) On. Major revision in 002. 1023600100037 ENDBIB 35 0 1023600100038 NOCOMMON 0 0 1023600100039 ENDSUBENT 38 0 1023600199999 SUBENT 10236002 20190722 14541023600200001 BIB 6 23 1023600200002 REACTION 1((92-U-233(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1023600200003 2(92-U-233(N,F),,SIG) 1023600200004 MONITOR 2(92-U-235(N,F),,SIG) 1023600200005 MONIT-REF 2(,,3,ENDF/B-V,,1978) 1023600200006 ERR-ANALYS1(ERR-T) Total error 1023600200007 - secondary source reactions (20% of correction) 1023600200008 - propagation from neutron energy error (~20% of the 1023600200009 energy resolution) 1023600200010 (ERR-1,,,F) Normalization of shape ratio: 1023600200011 - 234U half-life (0.02%) 1023600200012 - 233U/235U thermal ratio (0.25%) 1023600200013 - isotopic analysis (0.25%) 1023600200014 - alpha counting excluding statistics (0.15%) 1023600200015 - thickness correction (0.10%) 1023600200016 - extrapolation (0.10%) 1023600200017 - dead time correction (0.25%) 1023600200018 - scattering correction (0.30%) 1023600200019 - statistical - alpha counting etc. (0.50%) 1023600200020 (ERR-2,,,U) Uncorrelated error, which principle due to 1023600200021 the counting statistics, but a part is based on the 1023600200022 consistency of repeated measurements. 1023600200023 STATUS (TABLE) Table X of ANL-NDM-83 1023600200024 HISTORY (20190722A) On. ERR-S -> ERR-2. ERR-1 added. 1023600200025 ENDBIB 23 0 1023600200026 COMMON 1 3 1023600200027 ERR-1 1023600200028 PER-CENT 1023600200029 0.82 1023600200030 ENDCOMMON 3 0 1023600200031 DATA 6 56 1023600200032 EN EN-RSL-FW DATA 1ERR-2 1ERR-T 1DATA 21023600200033 MEV MEV NO-DIM PER-CENT PER-CENT B 1023600200034 0.142 0.042 1.475 0.98 1.56 2.171 1023600200035 0.153 0.086 1.494 0.82 2.11 2.169 1023600200036 0.174 0.040 1.518 1.11 1.58 2.152 1023600200037 0.206 0.050 1.576 0.90 1.67 2.154 1023600200038 0.256 0.034 1.671 1.43 1.82 2.164 1023600200039 0.306 0.044 1.760 0.95 1.27 2.215 1023600200040 0.351 0.031 1.717 1.34 1.57 2.119 1023600200041 0.395 0.040 1.741 0.80 1.15 2.109 1023600200042 0.446 0.029 1.724 1.09 1.36 2.044 1023600200043 0.495 0.036 1.760 0.71 1.08 2.056 1023600200044 0.550 0.027 1.734 1.07 1.35 2.002 1023600200045 0.604 0.036 1.721 0.74 1.11 1.970 1023600200046 0.661 0.026 1.741 1.11 1.38 1.983 1023600200047 0.678 0.042 1.720 0.63 1.04 1.958 1023600200048 0.723 0.042 1.702 1.00 1.30 1.935 1023600200049 0.795 0.062 1.703 0.71 1.16 1.939 1023600200050 0.896 0.039 1.625 1.00 1.36 1.895 1023600200051 0.995 0.058 1.548 0.72 1.13 1.887 1023600200052 1.125 0.036 1.561 1.01 1.30 1.897 1023600200053 1.255 0.034 1.564 1.01 1.30 1.913 1023600200054 1.300 0.070 1.551 0.76 1.12 1.905 1023600200055 1.327 0.069 1.548 0.83 1.17 1.906 1023600200056 1.416 0.067 1.522 0.85 1.18 1.888 1023600200057 1.496 0.065 1.539 0.30 0.87 1.925 1023600200058 1.777 0.062 1.534 0.85 1.18 1.972 1023600200059 1.966 0.058 1.537 0.29 0.87 1.993 1023600200060 2.256 0.110 1.533 0.85 1.18 1.975 1023600200061 2.495 0.104 1.534 0.29 0.87 1.946 1023600200062 2.714 0.100 1.522 0.85 1.18 1.899 1023600200063 2.998 0.095 1.541 0.27 0.86 1.878 1023600200064 3.271 0.089 1.532 0.84 1.17 1.830 1023600200065 3.523 0.084 1.537 0.84 1.17 1.802 1023600200066 3.775 0.080 1.524 0.84 1.17 1.753 1023600200067 4.027 0.078 1.495 0.85 1.18 1.691 1023600200068 4.278 0.077 1.479 0.86 1.19 1.661 1023600200069 4.529 0.074 1.506 0.77 1.13 1.669 1023600200070 4.766 0.292 1.472 1.05 1.34 1.598 1023600200071 4.780 0.073 1.511 0.77 1.13 1.638 1023600200072 5.360 0.221 1.475 1.02 1.35 1.545 1023600200073 5.918 0.190 1.565 1.08 1.36 1.703 1023600200074 6.357 0.170 1.482 0.93 1.38 1.904 1023600200075 6.482 0.164 1.475 1.07 1.46 1.996 1023600200076 6.624 0.157 1.433 0.92 1.33 2.036 1023600200077 6.884 0.147 1.367 0.93 1.30 2.071 1023600200078 7.121 0.140 1.344 1.04 1.36 2.150 1023600200079 7.169 0.380 1.348 1.01 1.33 2.181 1023600200080 7.399 0.132 1.316 0.99 1.30 2.225 1023600200081 7.478 0.132 1.288 0.88 1.21 2.206 1023600200082 7.653 0.129 1.283 1.24 1.49 2.240 1023600200083 7.906 0.126 1.276 1.24 1.49 2.264 1023600200084 8.154 0.124 1.298 1.24 1.49 2.315 1023600200085 8.405 0.122 1.297 1.41 1.64 2.312 1023600200086 8.651 0.120 1.298 1.30 1.54 2.309 1023600200087 8.897 0.120 1.302 1.21 1.47 2.309 1023600200088 9.143 0.120 1.273 1.17 1.46 2.252 1023600200089 9.367 0.120 1.288 1.24 1.52 2.273 1023600200090 ENDDATA 58 0 1023600200091 ENDSUBENT 90 0 1023600299999 ENDENTRY 2 0 1023699999999