ENTRY 10843 20221018 150410843000 1 SUBENT 10843001 20221018 150410843001 1 BIB 13 47 10843001 2 TITLE The fission cross section of 230Th and 232Th relative 10843001 3 to 235U 10843001 4 AUTHOR (J.W.Meadows) 10843001 5 INSTITUTE (1USAANL) 10843001 6 REFERENCE (C,79KNOX,,479,1979) 10843001 7 (R,ANL-NDM-83,1983) Revised data in tables 10843001 8 FACILITY (DYNAM,1USAANL) ANL Fast Neutron Generator 10843001 9 INC-SOURCE (P-LI7) En < 5 MeV. Li on Ta backing. 10843001 10 (D-D) En > 5 MeV. Deuterons on deuterium gas (2 atm). 10843001 11 SAMPLE Sample deposited by molecular deposition. 10843001 12 - 232Th deposited on platinum backing. 10843001 13 - 235U deposited on stainless steel backing. 10843001 14 DETECTOR (IOCH) Low mass double ionization chamber placed 5 cm 10843001 15 from neutron source using methane gas as the counter 10843001 16 gas. 10843001 17 Samples placed back-to-back in chamber. 10843001 18 METHOD Pulsed beam and fast timing used to reduce and measure 10843001 19 room return background. 10843001 20 Sample geometry differences and first order momentum 10843001 21 effects eliminated by measurements in both detector 10843001 22 orientations. 10843001 23 Background from deuteron-neutron reactions in methane 10843001 24 gas cell measured with empty cell. 10843001 25 CORRECTION Corrected for 10843001 26 - Background 10843001 27 - Pulse height distribution below bias level 10843001 28 - Scattering in detector and neutron source assembly 10843001 29 - Deposit thickness 10843001 30 - Residual momentum effects 10843001 31 - Fragment angular distribution 10843001 32 - 7Li(p,n1)7Be*, 7Li(p,nt)4He and D(d,pn)D neutrons 10843001 33 ERR-ANALYS (ERR-T) Total error due to neutron energy error and 10843001 34 (ERR-S,,,U) Uncorrelated error (counting statistics, 10843001 35 consistency of repeated measurements) 10843001 36 (ERR-1,,,F) 234U half-life (0.12%) 10843001 37 (ERR-2,,,F) Isotopic analysis (0.25%) 10843001 38 (ERR-3,,,F) Isotopic dilution (0.56%) 10843001 39 (ERR-4,,,F) Colorimetric analysis (0.16%) 10843001 40 (ERR-7,,,F) Extrapolation (0.20%) 10843001 41 (ERR-8,,,F) Scattering correction (0.60%) 10843001 42 STATUS (APRVD) J.W.Meadows, 84/3/2. 10843001 43 HISTORY (19791219C) 10843001 44 (19801205A) Reference update. 10843001 45 (19840206A) Revised per ANL-NDM-83 10843001 46 (19851211A) REFERENCE correction. 10843001 47 (20221018A) On+VT. ERR-1 to ERR-8 added; 10843001 48 Major revisions in 002-003. 10843001 49 ENDBIB 47 0 10843001 50 COMMON 6 3 10843001 51 ERR-1 ERR-2 ERR-3 ERR-4 ERR-7 ERR-8 10843001 52 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 10843001 53 0.12 0.25 0.56 0.16 0.20 0.60 10843001 54 ENDCOMMON 3 0 10843001 55 ENDSUBENT 54 0 1084300199999 SUBENT 10843002 20221018 150410843002 1 BIB 8 15 10843002 2 REACTION 1((90-TH-230(N,F),,SIG)/(92-U-235(N,F),,SIG)) 10843002 3 2(90-TH-230(N,F),,SIG) 10843002 4 MONITOR 2(92-U-235(N,F),,SIG) 10843002 5 MONIT-REF 2(,,3,ENDF/B-V,,1978) 10843002 6 SAMPLE (90-TH-230,ENR=0.99516) 10843002 7 (90-TH-232,ENR=0.00484) 10843002 8 ANALYSIS Ratios normalized at 2.003, 2.498, 2.747, 2.993 MeV. 10843002 9 ERR-ANALYS (ERR-5,,,F) Alpha-counting systematic (0.30%) 10843002 10 (ERR-6,,,F) Thickness correction, (0.41%) 10843002 11 (ERR-9,,,F) Statistics in normalization (0.59%) 10843002 12 (ERR-10,,2.42) Secondary source reactions (<2.42%) 10843002 13 STATUS (TABLE) Table VIII of ANL/NDM-83 10843002 14 HISTORY (19840627A) REACTION TARGET corrected. 10843002 15 (20221018A) On+VT. ERR-5, ERR-6 and ERR-9 added; 10843002 16 0.2471 -> 0.2472 at 4.481 MeV 10843002 17 ENDBIB 15 0 10843002 18 COMMON 3 3 10843002 19 ERR-5 ERR-6 ERR-9 10843002 20 PER-CENT PER-CENT PER-CENT 10843002 21 0.30 0.41 0.59 10843002 22 ENDCOMMON 3 0 10843002 23 DATA 6 68 10843002 24 EN EN-RSL-FW DATA 1ERR-S 1ERR-T 1DATA 210843002 25 MEV MEV NO-DIM PER-CENT PER-CENT B 10843002 26 0.737 0.052 0.0337 2.65 4.93 0.0384 10843002 27 0.767 0.052 0.02842 3.02 7.17 0.03231 10843002 28 0.799 0.052 0.01056 4.83 7.34 0.01203 10843002 29 0.830 0.052 0.01051 5.22 5.34 0.01201 10843002 30 0.860 0.052 0.01430 4.76 10.98 0.01646 10843002 31 0.892 0.052 0.02751 3.56 11.42 0.03204 10843002 32 0.923 0.052 0.0411 2.48 11.06 0.0487 10843002 33 0.956 0.050 0.0563 2.24 9.50 0.0678 10843002 34 0.987 0.048 0.0693 2.01 9.11 0.0844 10843002 35 1.017 0.048 0.0998 1.74 10.33 0.1216 10843002 36 1.048 0.048 0.1377 1.56 6.84 0.1673 10843002 37 1.078 0.048 0.1669 1.54 4.41 0.2028 10843002 38 1.105 0.044 0.1628 1.28 4.32 0.1978 10843002 39 1.107 0.048 0.1757 1.49 3.23 0.2136 10843002 40 1.140 0.044 0.1881 1.24 2.52 0.2287 10843002 41 1.170 0.044 0.2055 1.21 2.54 0.2502 10843002 42 1.200 0.042 0.2172 1.22 2.55 0.2650 10843002 43 1.232 0.042 0.2359 1.18 2.09 0.2883 10843002 44 1.261 0.040 0.2387 1.16 1.65 0.2922 10843002 45 1.292 0.040 0.2287 1.15 2.15 0.2807 10843002 46 1.323 0.040 0.2132 1.24 2.54 0.2624 10843002 47 1.357 0.040 0.1986 1.22 1.69 0.2451 10843002 48 1.383 0.040 0.2183 1.22 3.08 0.2701 10843002 49 1.402 0.068 0.2175 1.06 2.55 0.2695 10843002 50 1.413 0.040 0.2301 1.19 1.67 0.2855 10843002 51 1.452 0.066 0.2170 1.03 2.68 0.2703 10843002 52 1.502 0.064 0.1988 1.06 2.33 0.2488 10843002 53 1.551 0.064 0.1917 1.11 1.63 0.2411 10843002 54 1.600 0.064 0.2046 1.06 2.10 0.2586 10843002 55 1.650 0.064 0.2143 1.04 2.35 0.2724 10843002 56 1.701 0.064 0.2374 0.99 2.14 0.3035 10843002 57 1.750 0.062 0.2441 0.97 1.70 0.3132 10843002 58 1.800 0.060 0.2509 1.02 1.51 0.3232 10843002 59 1.850 0.060 0.2433 0.91 1.53 0.3141 10843002 60 1.899 0.060 0.2358 0.90 1.65 0.3051 10843002 61 2.003 0.118 0.2250 0.52 1.24 0.2921 10843002 62 2.124 0.112 0.2256 0.96 1.47 0.2923 10843002 63 2.250 0.108 0.2367 0.94 1.45 0.3051 10843002 64 2.374 0.108 0.2251 0.11 1.53 0.2882 10843002 65 2.498 0.104 0.2355 0.41 1.18 0.2988 10843002 66 2.747 0.100 0.2345 0.38 1.17 0.2920 10843002 67 2.993 0.094 0.2328 0.34 1.16 0.2840 10843002 68 3.241 0.090 0.2331 0.86 1.41 0.2792 10843002 69 3.489 0.088 0.2403 0.91 1.47 0.2825 10843002 70 3.984 0.080 0.2520 1.08 1.71 0.2855 10843002 71 4.233 0.076 0.2481 1.00 1.82 0.2790 10843002 72 4.481 0.076 0.2472 0.10 2.15 0.2750 10843002 73 4.664 0.310 0.2386 1.38 1.77 0.2614 10843002 74 4.730 0.076 0.2449 1.10 2.46 0.2668 10843002 75 4.977 0.072 0.2414 1.12 2.89 0.2574 10843002 76 4.980 0.248 0.2337 1.75 2.07 0.2491 10843002 77 5.308 0.223 0.2355 1.11 1.57 0.2468 10843002 78 5.577 0.207 0.2318 1.34 1.74 0.2431 10843002 79 5.838 0.192 0.2290 1.29 1.70 0.2456 10843002 80 6.130 0.180 0.2445 1.14 2.17 0.2870 10843002 81 6.398 0.167 0.2792 1.06 2.28 0.3644 10843002 82 6.659 0.154 0.314 1.21 2.38 0.452 10843002 83 6.887 0.146 0.366 1.12 2.25 0.555 10843002 84 7.147 0.138 0.410 1.04 1.76 0.660 10843002 85 7.403 0.133 0.429 1.01 1.50 0.726 10843002 86 7.677 0.128 0.420 0.99 1.50 0.736 10843002 87 7.926 0.126 0.411 1.01 1.52 0.730 10843002 88 8.172 0.124 0.393 1.01 1.52 0.702 10843002 89 8.417 0.122 0.380 1.00 1.57 0.677 10843002 90 8.646 0.120 0.370 1.39 1.18 0.659 10843002 91 8.890 0.120 0.369 1.03 1.61 0.655 10843002 92 9.133 0.120 0.362 1.01 1.64 0.640 10843002 93 9.378 0.121 0.353 0.87 1.69 0.622 10843002 94 ENDDATA 70 0 10843002 95 ENDSUBENT 94 0 1084300299999 SUBENT 10843003 20221018 150410843003 1 BIB 8 13 10843003 2 REACTION 1((90-TH-232(N,F),,SIG)/(92-U-235(N,F),,SIG)) 10843003 3 2(90-TH-232(N,F),,SIG) 10843003 4 MONITOR 2(92-U-235(N,F),,SIG) 10843003 5 MONIT-REF 2(,,3,ENDF/B-V,,1978) 10843003 6 SAMPLE (90-TH-232,ENR=0.99621) 10843003 7 (90-TH-230,ENR=0.00379) 10843003 8 ANALYSIS Ratios normalized at 1.997, 2.494, 2.987 MeV. 10843003 9 ERR-ANALYS (ERR-5,,,F) Alpha-counting systematic (0.38%) 10843003 10 (ERR-6,,,F) Thickness correction (0.30%) 10843003 11 (ERR-9,,,F) Statistics in normalization (0.57%) 10843003 12 (ERR-10,,2.62) Secondary source reactions (<2.62%) 10843003 13 STATUS (TABLE) Table IX of ANL/NDM-83 10843003 14 HISTORY (20221018A) On+VT. ERR-5, ERR-6 and ERR-9 added. 10843003 15 ENDBIB 13 0 10843003 16 COMMON 3 3 10843003 17 ERR-5 ERR-6 ERR-9 10843003 18 PER-CENT PER-CENT PER-CENT 10843003 19 0.38 0.30 0.57 10843003 20 ENDCOMMON 3 0 10843003 21 DATA 6 70 10843003 22 EN EN-RSL-FW DATA 1ERR-S 1ERR-T 1DATA 210843003 23 MEV MEV NO-DIM PER-CENT PER-CENT B 10843003 24 1.267 0.038 0.00953 2.02 5.32 0.01167 10843003 25 1.292 0.037 0.01130 1.86 10.03 0.01387 10843003 26 1.316 0.037 0.01762 1.54 10.84 0.02167 10843003 27 1.341 0.037 0.02310 1.44 7.57 0.02848 10843003 28 1.367 0.037 0.02927 1.32 7.16 0.03617 10843003 29 1.391 0.036 0.0367 1.24 8.14 0.0454 10843003 30 1.417 0.037 0.0486 1.16 4.50 0.0604 10843003 31 1.429 0.036 0.0449 1.42 1.92 0.0558 10843003 32 1.466 0.036 0.0504 1.15 2.14 0.0628 10843003 33 1.490 0.035 0.0520 1.34 3.20 0.0650 10843003 34 1.514 0.036 0.0593 1.12 4.39 0.0743 10843003 35 1.540 0.032 0.0691 1.30 4.12 0.0868 10843003 36 1.565 0.035 0.0791 1.06 5.62 0.0997 10843003 37 1.590 0.034 0.0945 1.21 1.76 0.1193 10843003 38 1.605 0.034 0.0840 1.06 2.61 0.1062 10843003 39 1.639 0.034 0.0830 1.22 1.92 0.1054 10843003 40 1.691 0.031 0.0790 1.39 2.06 0.1008 10843003 41 1.716 0.031 0.0801 1.39 2.12 0.1024 10843003 42 1.741 0.031 0.0628 1.42 2.70 0.0805 10843003 43 1.791 0.031 0.0628 1.42 2.70 0.0808 10843003 44 1.841 0.031 0.0775 1.38 2.94 0.1001 10843003 45 1.889 0.030 0.0931 1.35 2.08 0.1204 10843003 46 1.939 0.031 0.0967 1.35 1.80 0.1253 10843003 47 1.963 0.080 0.0951 0.87 1.48 0.1233 10843003 48 1.997 0.115 0.0956 0.30 1.59 0.1240 10843003 49 2.024 0.116 0.1025 1.28 2.32 0.1330 10843003 50 2.122 0.112 0.1052 0.88 3.45 0.1363 10843003 51 2.176 0.112 0.1155 1.26 1.16 0.1493 10843003 52 2.277 0.108 0.0967 1.35 2.79 0.1245 10843003 53 2.371 0.108 0.0968 0.99 1.54 0.1239 10843003 54 2.382 0.106 0.0933 1.08 1.60 0.1193 10843003 55 2.449 0.076 0.0994 0.74 1.39 0.1266 10843003 56 2.485 0.104 0.0974 1.08 1.62 0.1237 10843003 57 2.494 0.105 0.0959 0.74 1.41 0.1216 10843003 58 2.687 0.100 0.1038 1.09 1.87 0.1299 10843003 59 2.746 0.100 0.1072 1.00 1.83 0.1335 10843003 60 2.788 0.096 0.1080 0.99 1.82 0.1340 10843003 61 2.889 0.096 0.1134 0.96 1.76 0.1395 10843003 62 2.953 0.072 0.1145 0.70 1.50 0.1401 10843003 63 2.954 0.094 0.1144 0.93 1.68 0.1400 10843003 64 2.987 0.095 0.1169 0.61 1.52 0.1426 10843003 65 3.232 0.090 0.1214 0.77 1.44 0.1455 10843003 66 3.243 0.089 0.1211 0.77 1.46 0.1450 10843003 67 3.478 0.088 0.1246 1.01 1.62 0.1466 10843003 68 3.492 0.085 0.1239 1.01 1.62 0.1456 10843003 69 3.724 0.081 0.1284 0.99 1.70 0.1482 10843003 70 3.743 0.086 0.1300 0.95 1.68 0.1499 10843003 71 3.972 0.078 0.1314 1.24 2.16 0.1490 10843003 72 4.238 0.078 0.1337 0.93 2.43 0.1503 10843003 73 4.486 0.075 0.1380 1.04 3.07 0.1534 10843003 74 4.736 0.073 0.1400 1.00 4.03 0.1524 10843003 75 5.106 0.223 0.1370 1.14 1.64 0.1448 10843003 76 5.596 0.206 0.1391 1.06 1.59 0.1459 10843003 77 5.870 0.192 0.1382 1.22 1.70 0.1490 10843003 78 6.142 0.180 0.1497 1.10 1.65 0.1766 10843003 79 6.409 0.166 0.2038 1.00 1.58 0.2672 10843003 80 6.673 0.154 0.2447 0.94 1.51 0.3532 10843003 81 6.931 0.145 0.2598 0.92 1.50 0.3977 10843003 82 7.188 0.138 0.2580 0.94 1.51 0.4195 10843003 83 7.444 0.132 0.2469 0.94 1.51 0.4205 10843003 84 7.693 0.128 0.2319 0.94 1.51 0.4065 10843003 85 7.944 0.125 0.2193 0.96 1.52 0.3909 10843003 86 8.194 0.124 0.2100 0.96 1.52 0.3747 10843003 87 8.443 0.122 0.2098 1.04 1.65 0.3740 10843003 88 8.687 0.120 0.1971 1.01 1.58 0.3505 10843003 89 8.934 0.120 0.1965 1.00 1.71 0.3484 10843003 90 9.177 0.120 0.1987 1.01 1.84 0.3513 10843003 91 9.419 0.120 0.1959 1.04 2.05 0.3455 10843003 92 9.663 0.121 0.1914 1.07 2.30 0.3364 10843003 93 9.904 0.122 0.1885 1.30 2.50 0.3302 10843003 94 ENDDATA 72 0 10843003 95 ENDSUBENT 94 0 1084300399999 ENDENTRY 3 0 1084399999999