ENTRY 14029 20120225 13791402900000001 SUBENT 14029001 20120225 13791402900100001 BIB 13 18 1402900100002 TITLE A measurement of the thermal neutron capture cross 1402900100003 section of Th232 1402900100004 AUTHOR (R.T.Jones, J.S.Merritt, A.Okazaki) 1402900100005 INSTITUTE (1CANCRC) 1402900100006 REFERENCE (C,85SANTA,1,537,1985) 1402900100007 (P,INDC(CAN)-20,6,1980) Prelim.value(7.32+/-0.05)b gvn 1402900100008 FACILITY (REAC,1CANCRC) NRU Reactor 1402900100009 INC-SOURCE Graphite thermal column, neutron flux ~ 10e+10 n/cm2/s.1402900100010 SAMPLE Thin disks of thorium metal and of sintered thoria 1402900100011 ThO2 1402900100012 DETECTOR (GELI) for 311.9 keV gamma-ray counting 1402900100013 DECAY-DATA (90-TH-233,22.3MIN,DG,311.9) 1402900100014 RAD-DET (91-PA-233,DG) 311.9 keV transition in U-233 1402900100015 METHOD (ACTIV) Irradiated for 3 hours 1402900100016 ADD-RES (STRUC) T(1/2) of Pa-233 (26.967+/-0.0002 days) 1402900100017 HISTORY (20050712C) DR 1402900100018 (20050928C) DR Second reference added 1402900100019 (20120225U) On. BIB updated 1402900100020 ENDBIB 18 0 1402900100021 NOCOMMON 0 0 1402900100022 ENDSUBENT 21 0 1402900199999 SUBENT 14029002 20120225 13791402900200001 BIB 6 18 1402900200002 REACTION (90-TH-232(N,G)90-TH-233,,SIG) 1402900200003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 1402900200004 COMMENT By authors: 1402900200005 - Cd-ratios show Th-232 and Au-197 capture due to 1402900200006 epithermal activation was negligible. 1402900200007 - Using ENDF/B-V, sig(Th,2200 m/s)/sig(Au,2200 m/s) 1402900200008 is adopted 1% larger than the ratio for effective 1402900200009 cross sections. 1402900200010 - Neutron temperature was taken to be the same as 1402900200011 that of the graphite moderator at the irradiation 1402900200012 site (26 deg-C). 1402900200013 By Compiler (2012-06-14): 1402900200014 The uncertainty at the 95.4% confidence level (0.06 b)1402900200015 was converted to standard deviation 0.03 b. 1402900200016 ERR-ANALYS (DATA-ERR) Contributions from both random and 1402900200017 systematic sources 1402900200018 STATUS (TABLE) Abstract of Conf.Proc.of 85SANTA, vol.1,p.537 1402900200019 HISTORY (20120225A) On. SF8: MXW removed. ASSUMED -> MONITOR 1402900200020 ENDBIB 18 0 1402900200021 NOCOMMON 0 0 1402900200022 DATA 4 1 1402900200023 EN DATA DATA-ERR MONIT 1402900200024 EV B B B 1402900200025 0.0253 7.33 0.03 98.8 1402900200026 ENDDATA 3 0 1402900200027 ENDSUBENT 26 0 1402900299999 ENDENTRY 2 0 1402999999999