ENTRY 30059 20080215 31253005900000001 SUBENT 30059001 20080215 31253005900100001 BIB 15 31 3005900100002 INSTITUTE (3AULAUA) 3005900100003 REFERENCE (R,AAEC/TM-443,196803) Full information 3005900100004 AUTHOR (R.N.Whittem) 3005900100005 TITLE Determination of thermal neutron capture cross section 3005900100006 of Samarium-148 3005900100007 FACILITY (REAC) Hole C1 in rig x6 of Hifar reactor 3005900100008 (SPECM) A.E.I.Ltd. Mass spectrometer type MS5 3005900100009 INC-SOURCE (REAC) Reactor 3005900100010 INC-SPECT =Pile spectrum characterized by Westcott r=0.0004 As 3005900100011 measured by Boldeman,et.Al.,AAEC/Tm151 (1962) 3005900100012 SAMPLE 12 Silica ampules each containing 3005900100013 1-12 mu-gram samarium deposited on wall as nitrate of 3005900100014 unknown hydration were irradiated in an aluminum can. 3005900100015 Two isotopic compositions were prepared from Oak Ridge 3005900100016 oxides of known isotopic composition. 1)Sm148 + 3005900100017 0.032%Sm149. 2)Sm148/Sm149 ratio equal to about unity 3005900100018 METHOD Reactor irradiation with cobalt monitor. Changes in the3005900100019 ratios Sm149/Sm148 and (Sm149+Sm150)/Sm148 were measur-3005900100020 ed with a mass spectrometer. 3005900100021 DETECTOR Mass spectrometer 3005900100022 (IOCH) Calibrated ionization chamber for Co-59(n,g) 3005900100023 MONITOR (27-CO-59(N,G)27-CO-60,,SIG) 3005900100024 Sample.Aluminum wire containing 0.5% cobalt as flux 3005900100025 monitor using cobalt data recommended by Wade+Bailey 3005900100026 (AERE-R-5314) of which the 2200 m/s value 3005900100027 is given below 3005900100028 PART-DET (RSD) Product nuclei Sm-149,150 and unreacted Sm-148 3005900100029 STATUS (TABLE) Data from AAEC/TM-443 3005900100030 HISTORY (20080423A) Part of data restored, subentry 3 deleted. 3005900100031 CORRECTION Self-shielding and mass spectrometry background errors 3005900100032 are discussed and considered negligible. 3005900100033 ENDBIB 31 0 3005900100034 COMMON 2 3 3005900100035 MONIT MONIT-ERR 3005900100036 B B 3005900100037 3.7400E+01 6.0000E-01 3005900100038 ENDCOMMON 3 0 3005900100039 ENDSUBENT 38 0 3005900199999 SUBENT 30059002 20080215 31253005900200001 BIB 3 6 3005900200002 REACTION (62-SM-148(N,G)62-SM-149,,SIG,,SPA) 3005900200003 HISTORY (19690715C) 3005900200004 (19711115T) previously Dastar-902 3005900200005 (19810116U) OS.- Error heading changed 3005900200006 (20080215S) Dataset was restored. 3005900200007 ERR-ANALYS (ERR-S) statistical error, standard deviation 3005900200008 ENDBIB 6 0 3005900200009 NOCOMMON 0 0 3005900200010 DATA 3 1 3005900200011 EN-DUMMY DATA ERR-S 3005900200012 EV B B 3005900200013 0.0253 4.73 0.08 3005900200014 ENDDATA 3 0 3005900200015 ENDSUBENT 14 0 3005900299999 NOSUBENT 30059003 20080215 31253005900300001 SUBENT 30059004 20080215 31253005900400001 BIB 4 10 3005900400002 REACTION (62-SM-148(N,G)62-SM-149,,SIG) 3005900400003 STATUS (DEP,30059002) 3005900400004 (DEP,30059003) 3005900400005 HISTORY (19690715C) 3005900400006 (19711115T)Previously Dastar-902 3005900400007 (19810116U) OS.- Error headings changed 3005900400008 (20080215S) Dataset was restored. 3005900400009 ERR-ANALYS (ERR-S) Statistical error, standard deviation 3005900400010 (ERR-T) Total error = statist.Error compounded with 3005900400011 effect of uncertainty(0.6B) in Co59(n,g) cross section 3005900400012 ENDBIB 10 0 3005900400013 NOCOMMON 0 0 3005900400014 DATA 4 1 3005900400015 EN DATA ERR-S ERR-T 3005900400016 EV B B B 3005900400017 0.0253 4.73 0.08 0.11 3005900400018 ENDDATA 3 0 3005900400019 ENDSUBENT 18 0 3005900499999 SUBENT 30059005 20080215 31253005900500001 BIB 3 5 3005900500002 REACTION (62-SM-149(N,G)62-SM-150,,SIG,,SPA) 3005900500003 HISTORY (19711115C) 3005900500004 (19810116U) OS.- Error heading changed 3005900500005 (20080215S) Dataset was restored. 3005900500006 ERR-ANALYS (ERR-S) Statistical error, standard deviation 3005900500007 ENDBIB 5 0 3005900500008 NOCOMMON 0 0 3005900500009 DATA 3 1 3005900500010 EN-DUMMY DATA ERR-S 3005900500011 EV B B 3005900500012 0.0253 82230. 400. 3005900500013 ENDDATA 3 0 3005900500014 ENDSUBENT 13 0 3005900599999 ENDENTRY 5 0 3005999999999