ENTRY 13426 20220317 150313426 0 1 SUBENT 13426001 20220317 150313426 1 1 BIB 11 40 13426 1 2 TITLE Yield of Kr85 and Xe133 in the thermal neutron 13426 1 3 fission of U235 and yield of Kr85 in the thermal 13426 1 4 neutron fission of Pu239 13426 1 5 AUTHOR (S.Katcoff,W.Rubinson) 13426 1 6 REFERENCE (R,BNL-1652,1953) Original publication. 13426 1 7 (J,JIN,27,1447,1965) Journal publication. 13426 1 8 #doi:10.1016/0022-1902(65)80001-x 13426 1 9 REL-REF (O,13371001,S.Katcoff+,J,PR,91,1458,1953) Independent 13426 1 10 and cumulative yields ratios from the same experiment. 13426 1 11 (I,13371001,S.Katcoff+,J,PR,91,1458,1953) 13426 1 12 the double-chamber fission counting apparatus. 13426 1 13 INSTITUTE (1USABNL) 13426 1 14 FACILITY (REAC,1USABNL) Brookhaven pile. 13426 1 15 INC-SPECT 2x10**11 n/cm**2/sec, the flux was constant to +- 2% 13426 1 16 after reaching its full value. 13426 1 17 DETECTOR (PROPC,FISCH) Two gas proportional counters with 13426 1 18 silver cathodes, 2 cm dia. and 30 cm long. The 13426 1 19 krypton pressure was about 300 mm and methane was 13426 1 20 added to bring the total pressure to 1 atm. 13426 1 21 SAMPLE The fission foils, which consist of 0.01 microg of 13426 1 22 235U or 239Pu deposited on a Pt disk 0.002 inch thick 13426 1 23 and 1 inch in diameter. 13426 1 24 METHOD (CHSEP,FISCT) Absolute radiochemical methods, fission 13426 1 25 yields to half life (Y/T). Foils were mounted on 13426 1 26 platinum in each of the two chambers of fission 13426 1 27 counting apparatus. The entire assembly was then 13426 1 28 irradiated in the brookhaven graphite reactor for 13426 1 29 6-12 hr, and the fission counting rates of the foils 13426 1 30 were recorded continuously. After irradiation the 13426 1 31 85Kr was radiochemically separated from the slug, 13426 1 32 purified, and its activity measured by internal gas 13426 1 33 phase proportional counting. From these values of the 13426 1 34 85Kr activity and the measured number of fissions the 13426 1 35 fission yield was calculated. 13426 1 36 HISTORY (19900111C) VM 13426 1 37 (20220317A) BP: Updated to new date formats, lower 13426 1 38 case. Corrections according last EXFOR rules and 13426 1 39 Dict. Replaced RIDER's data with the original 13426 1 40 publication, updated METHOD, added FACILITY, INC-SPECT,13426 1 41 REL-REF. 13426 1 42 ENDBIB 40 0 13426 1 43 COMMON 1 3 13426 1 44 EN-DUMMY 13426 1 45 EV 13426 1 46 0.0253 13426 1 47 ENDCOMMON 3 0 13426 1 48 ENDSUBENT 47 0 13426 199999 SUBENT 13426002 20220317 150313426 2 1 BIB 6 14 13426 2 2 REACTION (92-U-235(N,F)36-KR-85-G,CUM,FY,,SPA) 13426 2 3 SAMPLE (92-U-235,ENR=0.9372) 13426 2 4 ERR-ANALYS (DATA-ERR) The standard deviation is 1.59% of Y/T. As 13426 2 5 concern for possible systematic errors. We feel that 13426 2 6 is unlikely that measured Y/T values differ from true 13426 2 7 more than 3%. Which we adopt as our accuracy estimate. 13426 2 8 (ERR-1) 1% per slug fissions. 13426 2 9 (ERR-2) 2% for 85Kr activity. 13426 2 10 DECAY-DATA ((1.)36-KR-85-G,10.27YR) 10.27+-0.18 years 13426 2 11 ((2.)36-KR-85-G,10.8YR) 13426 2 12 STATUS (TABLE) page 49 of R,BNL-1652,1953. 13426 2 13 (SPSDD,13215002) 13426 2 14 HISTORY (20220317A) BP: Replaced RIDER's data with the 13426 2 15 original published data. Added STATUS (SPSDD) 13426 2 16 ENDBIB 14 0 13426 2 17 COMMON 2 3 13426 2 18 ERR-1 ERR-2 13426 2 19 PER-CENT PER-CENT 13426 2 20 1.0 2.0 13426 2 21 ENDCOMMON 3 0 13426 2 22 DATA 3 2 13426 2 23 DATA DATA-ERR DECAY-FLAG 13426 2 24 PC/FIS PER-CENT NO-DIM 13426 2 25 0.260 2.36 1. 13426 2 26 0.273 1.9 2. 13426 2 27 ENDDATA 4 0 13426 2 28 ENDSUBENT 27 0 13426 299999 SUBENT 13426003 20220317 150313426 3 1 BIB 5 9 13426 3 2 REACTION (94-PU-239(N,F)36-KR-85-G,CUM,FY,,SPA) 13426 3 3 ERR-ANALYS (DATA-ERR) Standard deviation per determination of Y/T 13426 3 4 is 4.3%. 13426 3 5 DECAY-DATA ((1.)36-KR-85-G,10.27YR) 10.27+-0.18 years 13426 3 6 ((2.)36-KR-85-G,10.8YR) 13426 3 7 STATUS (TABLE) page 49 of R,BNL-1652,1953. 13426 3 8 (SPSDD,13215003) 13426 3 9 HISTORY (20220317A) BP: Replaced RIDER's data with the 13426 3 10 original published data. Added STATUS (SPSDD) 13426 3 11 ENDBIB 9 0 13426 3 12 NOCOMMON 0 0 13426 3 13 DATA 3 2 13426 3 14 DATA DATA-ERR DECAY-FLAG 13426 3 15 PC/FIS PER-CENT NO-DIM 13426 3 16 0.094 4.8 1. 13426 3 17 0.0994 4.4 2. 13426 3 18 ENDDATA 4 0 13426 3 19 ENDSUBENT 18 0 13426 399999 SUBENT 13426004 20220317 150313426 4 1 BIB 4 7 13426 4 2 REACTION ((92-U-235(N,F)54-XE-133,CUM,FY,,SPA)/ 13426 4 3 (92-U-235(N,F)36-KR-85-G,CUM,FY,,SPA)) 13426 4 4 DECAY-DATA (54-XE-133-G,5.27D) 13426 4 5 (36-KR-85-G,10.8YR) 13426 4 6 STATUS (TABLE) Table XIII, page 54 of R,BNL-1652,1953. 13426 4 7 HISTORY (20220317A) BP: Updated subentry to reflect the 13426 4 8 original publication. 13426 4 9 ENDBIB 7 0 13426 4 10 NOCOMMON 0 0 13426 4 11 DATA 1 1 13426 4 12 DATA 13426 4 13 NO-DIM 13426 4 14 24.0 13426 4 15 ENDDATA 3 0 13426 4 16 ENDSUBENT 15 0 13426 499999 ENDENTRY 4 0 1342699999999