ENTRY 10843 20221018 1084300000001 SUBENT 10843001 20221018 20231011 1084300100001 BIB 13 47 1084300100002 TITLE The fission cross section of 230Th and 232Th relative 1084300100003 to 235U 1084300100004 AUTHOR (J.W.Meadows) 1084300100005 INSTITUTE (1USAANL) 1084300100006 REFERENCE (C,79KNOX,,479,1979) 1084300100007 (R,ANL-NDM-83,1983) Revised data in tables 1084300100008 FACILITY (DYNAM,1USAANL) ANL Fast Neutron Generator 1084300100009 INC-SOURCE (P-LI7) En < 5 MeV. Li on Ta backing. 1084300100010 (D-D) En > 5 MeV. Deuterons on deuterium gas (2 atm). 1084300100011 SAMPLE Sample deposited by molecular deposition. 1084300100012 - 232Th deposited on platinum backing. 1084300100013 - 235U deposited on stainless steel backing. 1084300100014 DETECTOR (IOCH) Low mass double ionization chamber placed 5 cm 1084300100015 from neutron source using methane gas as the counter 1084300100016 gas. 1084300100017 Samples placed back-to-back in chamber. 1084300100018 METHOD Pulsed beam and fast timing used to reduce and measure 1084300100019 room return background. 1084300100020 Sample geometry differences and first order momentum 1084300100021 effects eliminated by measurements in both detector 1084300100022 orientations. 1084300100023 Background from deuteron-neutron reactions in methane 1084300100024 gas cell measured with empty cell. 1084300100025 CORRECTION Corrected for 1084300100026 - Background 1084300100027 - Pulse height distribution below bias level 1084300100028 - Scattering in detector and neutron source assembly 1084300100029 - Deposit thickness 1084300100030 - Residual momentum effects 1084300100031 - Fragment angular distribution 1084300100032 - 7Li(p,n1)7Be*, 7Li(p,nt)4He and D(d,pn)D neutrons 1084300100033 ERR-ANALYS (ERR-T) Total error due to neutron energy error and 1084300100034 (ERR-S,,,U) Uncorrelated error (counting statistics, 1084300100035 consistency of repeated measurements) 1084300100036 (ERR-1,,,F) 234U half-life (0.12%) 1084300100037 (ERR-2,,,F) Isotopic analysis (0.25%) 1084300100038 (ERR-3,,,F) Isotopic dilution (0.56%) 1084300100039 (ERR-4,,,F) Colorimetric analysis (0.16%) 1084300100040 (ERR-7,,,F) Extrapolation (0.20%) 1084300100041 (ERR-8,,,F) Scattering correction (0.60%) 1084300100042 STATUS (APRVD) J.W.Meadows, 84/3/2. 1084300100043 HISTORY (19791219C) 1084300100044 (19801205A) Reference update. 1084300100045 (19840206A) Revised per ANL-NDM-83 1084300100046 (19851211A) REFERENCE correction. 1084300100047 (20221018A) On+VT. ERR-1 to ERR-8 added; 1084300100048 Major revisions in 002-003. 1084300100049 ENDBIB 47 0 1084300100050 COMMON 6 3 1084300100051 ERR-1 ERR-2 ERR-3 ERR-4 ERR-7 ERR-8 1084300100052 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 1084300100053 0.12 0.25 0.56 0.16 0.20 0.60 1084300100054 ENDCOMMON 3 0 1084300100055 ENDSUBENT 54 0 1084300199999 SUBENT 10843002 20221018 20231011 1084300200001 BIB 8 15 1084300200002 REACTION 1((90-TH-230(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1084300200003 2(90-TH-230(N,F),,SIG) 1084300200004 MONITOR 2(92-U-235(N,F),,SIG) 1084300200005 MONIT-REF 2(,,3,ENDF/B-V,,1978) 1084300200006 SAMPLE (90-TH-230,ENR=0.99516) 1084300200007 (90-TH-232,ENR=0.00484) 1084300200008 ANALYSIS Ratios normalized at 2.003, 2.498, 2.747, 2.993 MeV. 1084300200009 ERR-ANALYS (ERR-5,,,F) Alpha-counting systematic (0.30%) 1084300200010 (ERR-6,,,F) Thickness correction, (0.41%) 1084300200011 (ERR-9,,,F) Statistics in normalization (0.59%) 1084300200012 (ERR-10,,2.42) Secondary source reactions (<2.42%) 1084300200013 STATUS (TABLE) Table VIII of ANL/NDM-83 1084300200014 HISTORY (19840627A) REACTION TARGET corrected. 1084300200015 (20221018A) On+VT. ERR-5, ERR-6 and ERR-9 added; 1084300200016 0.2471 -> 0.2472 at 4.481 MeV 1084300200017 ENDBIB 15 0 1084300200018 COMMON 3 3 1084300200019 ERR-5 ERR-6 ERR-9 1084300200020 PER-CENT PER-CENT PER-CENT 1084300200021 0.30 0.41 0.59 1084300200022 ENDCOMMON 3 0 1084300200023 DATA 6 68 1084300200024 EN EN-RSL-FW DATA 1ERR-S 1ERR-T 1DATA 21084300200025 MEV MEV NO-DIM PER-CENT PER-CENT B 1084300200026 0.737 0.052 0.0337 2.65 4.93 0.0384 1084300200027 0.767 0.052 0.02842 3.02 7.17 0.03231 1084300200028 0.799 0.052 0.01056 4.83 7.34 0.01203 1084300200029 0.830 0.052 0.01051 5.22 5.34 0.01201 1084300200030 0.860 0.052 0.01430 4.76 10.98 0.01646 1084300200031 0.892 0.052 0.02751 3.56 11.42 0.03204 1084300200032 0.923 0.052 0.0411 2.48 11.06 0.0487 1084300200033 0.956 0.050 0.0563 2.24 9.50 0.0678 1084300200034 0.987 0.048 0.0693 2.01 9.11 0.0844 1084300200035 1.017 0.048 0.0998 1.74 10.33 0.1216 1084300200036 1.048 0.048 0.1377 1.56 6.84 0.1673 1084300200037 1.078 0.048 0.1669 1.54 4.41 0.2028 1084300200038 1.105 0.044 0.1628 1.28 4.32 0.1978 1084300200039 1.107 0.048 0.1757 1.49 3.23 0.2136 1084300200040 1.140 0.044 0.1881 1.24 2.52 0.2287 1084300200041 1.170 0.044 0.2055 1.21 2.54 0.2502 1084300200042 1.200 0.042 0.2172 1.22 2.55 0.2650 1084300200043 1.232 0.042 0.2359 1.18 2.09 0.2883 1084300200044 1.261 0.040 0.2387 1.16 1.65 0.2922 1084300200045 1.292 0.040 0.2287 1.15 2.15 0.2807 1084300200046 1.323 0.040 0.2132 1.24 2.54 0.2624 1084300200047 1.357 0.040 0.1986 1.22 1.69 0.2451 1084300200048 1.383 0.040 0.2183 1.22 3.08 0.2701 1084300200049 1.402 0.068 0.2175 1.06 2.55 0.2695 1084300200050 1.413 0.040 0.2301 1.19 1.67 0.2855 1084300200051 1.452 0.066 0.2170 1.03 2.68 0.2703 1084300200052 1.502 0.064 0.1988 1.06 2.33 0.2488 1084300200053 1.551 0.064 0.1917 1.11 1.63 0.2411 1084300200054 1.600 0.064 0.2046 1.06 2.10 0.2586 1084300200055 1.650 0.064 0.2143 1.04 2.35 0.2724 1084300200056 1.701 0.064 0.2374 0.99 2.14 0.3035 1084300200057 1.750 0.062 0.2441 0.97 1.70 0.3132 1084300200058 1.800 0.060 0.2509 1.02 1.51 0.3232 1084300200059 1.850 0.060 0.2433 0.91 1.53 0.3141 1084300200060 1.899 0.060 0.2358 0.90 1.65 0.3051 1084300200061 2.003 0.118 0.2250 0.52 1.24 0.2921 1084300200062 2.124 0.112 0.2256 0.96 1.47 0.2923 1084300200063 2.250 0.108 0.2367 0.94 1.45 0.3051 1084300200064 2.374 0.108 0.2251 0.11 1.53 0.2882 1084300200065 2.498 0.104 0.2355 0.41 1.18 0.2988 1084300200066 2.747 0.100 0.2345 0.38 1.17 0.2920 1084300200067 2.993 0.094 0.2328 0.34 1.16 0.2840 1084300200068 3.241 0.090 0.2331 0.86 1.41 0.2792 1084300200069 3.489 0.088 0.2403 0.91 1.47 0.2825 1084300200070 3.984 0.080 0.2520 1.08 1.71 0.2855 1084300200071 4.233 0.076 0.2481 1.00 1.82 0.2790 1084300200072 4.481 0.076 0.2472 0.10 2.15 0.2750 1084300200073 4.664 0.310 0.2386 1.38 1.77 0.2614 1084300200074 4.730 0.076 0.2449 1.10 2.46 0.2668 1084300200075 4.977 0.072 0.2414 1.12 2.89 0.2574 1084300200076 4.980 0.248 0.2337 1.75 2.07 0.2491 1084300200077 5.308 0.223 0.2355 1.11 1.57 0.2468 1084300200078 5.577 0.207 0.2318 1.34 1.74 0.2431 1084300200079 5.838 0.192 0.2290 1.29 1.70 0.2456 1084300200080 6.130 0.180 0.2445 1.14 2.17 0.2870 1084300200081 6.398 0.167 0.2792 1.06 2.28 0.3644 1084300200082 6.659 0.154 0.314 1.21 2.38 0.452 1084300200083 6.887 0.146 0.366 1.12 2.25 0.555 1084300200084 7.147 0.138 0.410 1.04 1.76 0.660 1084300200085 7.403 0.133 0.429 1.01 1.50 0.726 1084300200086 7.677 0.128 0.420 0.99 1.50 0.736 1084300200087 7.926 0.126 0.411 1.01 1.52 0.730 1084300200088 8.172 0.124 0.393 1.01 1.52 0.702 1084300200089 8.417 0.122 0.380 1.00 1.57 0.677 1084300200090 8.646 0.120 0.370 1.39 1.18 0.659 1084300200091 8.890 0.120 0.369 1.03 1.61 0.655 1084300200092 9.133 0.120 0.362 1.01 1.64 0.640 1084300200093 9.378 0.121 0.353 0.87 1.69 0.622 1084300200094 ENDDATA 70 0 1084300200095 ENDSUBENT 94 0 1084300299999 SUBENT 10843003 20221018 20231011 1084300300001 BIB 8 13 1084300300002 REACTION 1((90-TH-232(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1084300300003 2(90-TH-232(N,F),,SIG) 1084300300004 MONITOR 2(92-U-235(N,F),,SIG) 1084300300005 MONIT-REF 2(,,3,ENDF/B-V,,1978) 1084300300006 SAMPLE (90-TH-232,ENR=0.99621) 1084300300007 (90-TH-230,ENR=0.00379) 1084300300008 ANALYSIS Ratios normalized at 1.997, 2.494, 2.987 MeV. 1084300300009 ERR-ANALYS (ERR-5,,,F) Alpha-counting systematic (0.38%) 1084300300010 (ERR-6,,,F) Thickness correction (0.30%) 1084300300011 (ERR-9,,,F) Statistics in normalization (0.57%) 1084300300012 (ERR-10,,2.62) Secondary source reactions (<2.62%) 1084300300013 STATUS (TABLE) Table IX of ANL/NDM-83 1084300300014 HISTORY (20221018A) On+VT. ERR-5, ERR-6 and ERR-9 added. 1084300300015 ENDBIB 13 0 1084300300016 COMMON 3 3 1084300300017 ERR-5 ERR-6 ERR-9 1084300300018 PER-CENT PER-CENT PER-CENT 1084300300019 0.38 0.30 0.57 1084300300020 ENDCOMMON 3 0 1084300300021 DATA 6 70 1084300300022 EN EN-RSL-FW DATA 1ERR-S 1ERR-T 1DATA 21084300300023 MEV MEV NO-DIM PER-CENT PER-CENT B 1084300300024 1.267 0.038 0.00953 2.02 5.32 0.01167 1084300300025 1.292 0.037 0.01130 1.86 10.03 0.01387 1084300300026 1.316 0.037 0.01762 1.54 10.84 0.02167 1084300300027 1.341 0.037 0.02310 1.44 7.57 0.02848 1084300300028 1.367 0.037 0.02927 1.32 7.16 0.03617 1084300300029 1.391 0.036 0.0367 1.24 8.14 0.0454 1084300300030 1.417 0.037 0.0486 1.16 4.50 0.0604 1084300300031 1.429 0.036 0.0449 1.42 1.92 0.0558 1084300300032 1.466 0.036 0.0504 1.15 2.14 0.0628 1084300300033 1.490 0.035 0.0520 1.34 3.20 0.0650 1084300300034 1.514 0.036 0.0593 1.12 4.39 0.0743 1084300300035 1.540 0.032 0.0691 1.30 4.12 0.0868 1084300300036 1.565 0.035 0.0791 1.06 5.62 0.0997 1084300300037 1.590 0.034 0.0945 1.21 1.76 0.1193 1084300300038 1.605 0.034 0.0840 1.06 2.61 0.1062 1084300300039 1.639 0.034 0.0830 1.22 1.92 0.1054 1084300300040 1.691 0.031 0.0790 1.39 2.06 0.1008 1084300300041 1.716 0.031 0.0801 1.39 2.12 0.1024 1084300300042 1.741 0.031 0.0628 1.42 2.70 0.0805 1084300300043 1.791 0.031 0.0628 1.42 2.70 0.0808 1084300300044 1.841 0.031 0.0775 1.38 2.94 0.1001 1084300300045 1.889 0.030 0.0931 1.35 2.08 0.1204 1084300300046 1.939 0.031 0.0967 1.35 1.80 0.1253 1084300300047 1.963 0.080 0.0951 0.87 1.48 0.1233 1084300300048 1.997 0.115 0.0956 0.30 1.59 0.1240 1084300300049 2.024 0.116 0.1025 1.28 2.32 0.1330 1084300300050 2.122 0.112 0.1052 0.88 3.45 0.1363 1084300300051 2.176 0.112 0.1155 1.26 1.16 0.1493 1084300300052 2.277 0.108 0.0967 1.35 2.79 0.1245 1084300300053 2.371 0.108 0.0968 0.99 1.54 0.1239 1084300300054 2.382 0.106 0.0933 1.08 1.60 0.1193 1084300300055 2.449 0.076 0.0994 0.74 1.39 0.1266 1084300300056 2.485 0.104 0.0974 1.08 1.62 0.1237 1084300300057 2.494 0.105 0.0959 0.74 1.41 0.1216 1084300300058 2.687 0.100 0.1038 1.09 1.87 0.1299 1084300300059 2.746 0.100 0.1072 1.00 1.83 0.1335 1084300300060 2.788 0.096 0.1080 0.99 1.82 0.1340 1084300300061 2.889 0.096 0.1134 0.96 1.76 0.1395 1084300300062 2.953 0.072 0.1145 0.70 1.50 0.1401 1084300300063 2.954 0.094 0.1144 0.93 1.68 0.1400 1084300300064 2.987 0.095 0.1169 0.61 1.52 0.1426 1084300300065 3.232 0.090 0.1214 0.77 1.44 0.1455 1084300300066 3.243 0.089 0.1211 0.77 1.46 0.1450 1084300300067 3.478 0.088 0.1246 1.01 1.62 0.1466 1084300300068 3.492 0.085 0.1239 1.01 1.62 0.1456 1084300300069 3.724 0.081 0.1284 0.99 1.70 0.1482 1084300300070 3.743 0.086 0.1300 0.95 1.68 0.1499 1084300300071 3.972 0.078 0.1314 1.24 2.16 0.1490 1084300300072 4.238 0.078 0.1337 0.93 2.43 0.1503 1084300300073 4.486 0.075 0.1380 1.04 3.07 0.1534 1084300300074 4.736 0.073 0.1400 1.00 4.03 0.1524 1084300300075 5.106 0.223 0.1370 1.14 1.64 0.1448 1084300300076 5.596 0.206 0.1391 1.06 1.59 0.1459 1084300300077 5.870 0.192 0.1382 1.22 1.70 0.1490 1084300300078 6.142 0.180 0.1497 1.10 1.65 0.1766 1084300300079 6.409 0.166 0.2038 1.00 1.58 0.2672 1084300300080 6.673 0.154 0.2447 0.94 1.51 0.3532 1084300300081 6.931 0.145 0.2598 0.92 1.50 0.3977 1084300300082 7.188 0.138 0.2580 0.94 1.51 0.4195 1084300300083 7.444 0.132 0.2469 0.94 1.51 0.4205 1084300300084 7.693 0.128 0.2319 0.94 1.51 0.4065 1084300300085 7.944 0.125 0.2193 0.96 1.52 0.3909 1084300300086 8.194 0.124 0.2100 0.96 1.52 0.3747 1084300300087 8.443 0.122 0.2098 1.04 1.65 0.3740 1084300300088 8.687 0.120 0.1971 1.01 1.58 0.3505 1084300300089 8.934 0.120 0.1965 1.00 1.71 0.3484 1084300300090 9.177 0.120 0.1987 1.01 1.84 0.3513 1084300300091 9.419 0.120 0.1959 1.04 2.05 0.3455 1084300300092 9.663 0.121 0.1914 1.07 2.30 0.3364 1084300300093 9.904 0.122 0.1885 1.30 2.50 0.3302 1084300300094 ENDDATA 72 0 1084300300095 ENDSUBENT 94 0 1084300399999 ENDENTRY 3 0 1084399999999