ENTRY 10874 19910829 00001087400000001 SUBENT 10874001 19910829 00001087400100001 BIB 15 28 1087400100002 INSTITUTE (1USARPI,2JPNKTO,1USAKAP) 1087400100003 REFERENCE (J,PR/C,43,1824,9104) 1087400100004 (J,ANS,28,719,7806) 1087400100005 AUTHOR (Y.NAKAGOME,R.C.BLOCK,R.SLOVACEK,E.B.BEAN) 1087400100006 TITLE NEUTRON-INDUCED FISSION CROSS SECTION OF 232TH FROM 1087400100007 1 EV TO 20 KEV. 1087400100008 EXP-YEAR (78) 1087400100009 FACILITY (LINAC,1USARPI) GAERTTNER LINEAR ACCELERATOR LAB 1087400100010 INC-SOURCE (PHOTO). TANTALUM TARGET 1087400100011 DETECTOR (IOCH) FOUR FISSION IONIZATION CHAMBERS 1087400100012 SAMPLE 233-MG OF HIGH PURITY THO(2) IN EACH CHAMBER. 1087400100013 SAMPLE IMPURITIES IN PARTS PER BILLION: 233U <0.04, 1087400100014 234U < 0.24, 235U < 25, 236U < 0.07, 238U < 5.2. 1087400100015 METHOD IONIZATION CHAMBERS ARE PLACED IN CENTER OF 10-CM BY 1087400100016 10-CM BY 30-CM BI BLOCKS INSIDE 75-TON LEAD-SLOWING- 1087400100017 DOWN SPECTROMETER 1087400100018 MONITOR (92-U-238(N,F),,SIG) NORMALIZED BETWEEN 1 EV AND 100 1087400100019 KEV USING DATA OF SLOVACEK, ET AL., NUC.SCI.ENG. 62, 1087400100020 455 (1977) 1087400100021 CORRECTION CORRECTIONS MADE FOR: 1087400100022 - 9.6% RESIDUAL LEAD CAPTURE INDUCED PHOTOFISSION 1087400100023 - SMALL PHOTOFISSION FROM ALUMINUM CAPTURE 1087400100024 - 20PPB OF 235U IN SAMPLE. 1087400100025 ERR-ANALYS (ERR-S) 1-SIGMA STATISTICAL UNCERTAINTY FROM COUNTING 1087400100026 STATISTICS. 1087400100027 STATUS (APRVD) APPROVED BY R.C.BLOCK, 79/11/13. 1087400100028 HISTORY (790924C) 1087400100029 (910829A) UPDATED TO PUBLISHED REFERENCE 1087400100030 ENDBIB 28 0 1087400100031 NOCOMMON 0 0 1087400100032 ENDSUBENT 31 0 1087400199999 SUBENT 10874002 19910829 00001087400200001 BIB 1 1 1087400200002 REACTION (90-TH-232(N,F),,SIG,,AV) 1087400200003 ENDBIB 1 0 1087400200004 NOCOMMON 0 0 1087400200005 DATA 4 43 1087400200006 EN-MIN EN-MAX DATA ERR-S 1087400200007 EV EV MICRO-B MICRO-B 1087400200008 1. 1.25 8.07 0.39 1087400200009 1.25 1.58 7.18 0.34 1087400200010 1.58 1.99 5.93 0.31 1087400200011 1.99 2.51 5.41 0.28 1087400200012 2.51 3.16 4.44 0.26 1087400200013 3.16 3.98 4.19 0.24 1087400200014 3.98 5.01 4.48 0.23 1087400200015 5.01 6.30 4.45 0.23 1087400200016 6.30 7.94 3.30 0.21 1087400200017 7.94 10.0 2.85 0.20 1087400200018 10.0 12.58 2.79 0.19 1087400200019 12.58 15.84 2.05 0.17 1087400200020 15.84 19.95 2.14 0.17 1087400200021 19.95 25.11 1.82 0.16 1087400200022 25.11 31.62 1.52 0.15 1087400200023 31.62 39.81 1.57 0.15 1087400200024 39.81 50.11 1.39 0.15 1087400200025 50.11 63.09 1.31 0.14 1087400200026 63.09 79.43 0.91 0.13 1087400200027 79.43 100.00 0.84 0.13 1087400200028 100.00 125.89 0.77 0.12 1087400200029 125.89 158.49 0.69 0.12 1087400200030 158.49 199.52 0.59 0.12 1087400200031 199.52 251.19 0.44 0.12 1087400200032 251.19 316.23 0.44 0.11 1087400200033 316.23 398.11 0.27 0.11 1087400200034 398.11 501.19 0.31 0.11 1087400200035 501.19 630.96 0.36 0.11 1087400200036 630.96 794.33 0.13 0.11 1087400200037 794.33 1000.00 0.45 0.06 1087400200038 1000.00 1258.93 0.50 0.06 1087400200039 1258.93 1584.90 0.35 0.07 1087400200040 1584.90 1995.27 0.19 0.07 1087400200041 1995.27 2511.90 0.27 0.06 1087400200042 2511.90 3162.29 0.55 0.09 1087400200043 3162.29 3981.09 0.60 0.09 1087400200044 3981.09 5011.89 1.23 0.10 1087400200045 5011.89 6309.60 0.98 0.09 1087400200046 6309.60 7943.31 0.77 0.08 1087400200047 7943.31 10000.00 0.44 0.07 1087400200048 10000.00 12589.29 0.52 0.07 1087400200049 12589.29 15848.97 0.53 0.07 1087400200050 15848.97 19952.67 0.67 0.07 1087400200051 ENDDATA 45 0 1087400200052 ENDSUBENT 51 0 1087400299999 ENDENTRY 2 0 1087499999999