ENTRY 13558 19931207 00001355800000001 SUBENT 13558001 19931207 00001355800100001 BIB 17 43 1355800100002 INSTITUTE (1CANCRC) 1355800100003 REFERENCE (J,NIM/A,332,232,93) 1355800100004 AUTHOR (M.A.LONE,W.J.EDWARDS,R.COLLINS) 1355800100005 TITLE Measurements of the Thermal Neutron Cross Section of 1355800100006 90Sr(n,gamma) Reaction 1355800100007 FACILITY (REAC) NRU D2O moderated reactor 1355800100008 INC-SOURCE Hydraulic Capsule Facility 1355800100009 INC-SPECT Cd ratio for cobalt about 30 1355800100010 SAMPLE 1 mCi purified 90Sr sealed in quartz. 1355800100011 METHOD (ACTIV) 1355800100012 (CHSEP) Y chemically separated from Sr before 1355800100013 irradiation and after irradiation but prior to 1355800100014 counting 91Sr activity. 1355800100015 DETECTOR (GE-IN) High resolution Ge spectrometer. 1355800100016 Detector efficiency determined using set of calibrated 1355800100017 137Cs, 134Cs, 133Ba, 88Y, 60Co, and 54Mn sources. 1355800100018 Amount of 90Sr in sample deterined from beta activity 1355800100019 of 90Y using end-window proportional counter. 1355800100020 DECAY-DATA (38-SR-91,9.48HR,DG,555.56,0.615,DG,749.72,0.236, 1355800100021 DG,1024.,0.33) 1355800100022 Branching ratios taken from Browne and Firestone, 1355800100023 'Table of Radioactive Isotopes' (1986) 1355800100024 MONITOR (27-CO-59(N,G)27-CO-60,,SIG,,MXW) 1355800100025 Co/Al alloy flux monitor. 1355800100026 ANALYSIS Value given average of data for three runs and for 1355800100027 three gammas measured. Averages for three gammas: 1355800100028 9.2mb (555keV), 10.3mb (749keV), 9.6mb (1024keV). 1355800100029 CORRECTION Corrected for: 1355800100030 . decay during counting period 1355800100031 . secular equilibrium of the 556 kev transition from 1355800100032 49.7 min 91Y. 1355800100033 ERR-ANALYS (DATA-ERR) Total rms uncertainty. 1355800100034 Includes uncertainties due to: 1355800100035 .contamination of the 90Sr by fissionable material 1355800100036 .weighing uncertainties 1355800100037 .volumetric uncertainties 1355800100038 .gamma measurement and gamma calibration uncertainties 1355800100039 .gamma branching ratio uncertainties 1355800100040 .beta- calibrations and measurements 1355800100041 STATUS Data taken from report 1355800100042 (APRVD) M.A.Lone, 93/3/15 1355800100043 HISTORY (930126C) 1355800100044 (931207A) Reference updated. 1355800100045 ENDBIB 43 0 1355800100046 NOCOMMON 0 0 1355800100047 ENDSUBENT 46 0 1355800199999 SUBENT 13558002 19930127 00001355800200001 BIB 1 1 1355800200002 REACTION (38-SR-90(N,G)38-SR-91,,SIG,,MXW) 1355800200003 ENDBIB 1 0 1355800200004 NOCOMMON 0 0 1355800200005 DATA 4 1 1355800200006 EN-DUMMY DATA DATA-ERR MONIT 1355800200007 EV MB MB B 1355800200008 0.0253 9.7 0.7 37. 1355800200009 ENDDATA 3 0 1355800200010 ENDSUBENT 9 0 1355800299999 ENDENTRY 2 0 1355899999999