ENTRY 12855 20101025 13671285500000001 SUBENT 12855001 20101025 13671285500100001 BIB 14 45 1285500100002 INSTITUTE (1USAKTY) 1285500100003 REFERENCE (J,PR/C,28,2249,198312) 1285500100004 AUTHOR (R.L.Hershberger,R.L.Macklin,M.Balakrishnan,N.W.Hill, 1285500100005 M.T.McEllistrem) 1285500100006 TITLE Neutron scattering from Os isotopes at 60 keV and Re-Os1285500100007 nucleochronology. 1285500100008 FACILITY (VDG) 1285500100009 METHOD (TOF) Time-of-flight with 2.3 meter flight path. 1285500100010 INC-SOURCE (P-LI7) Li-7(p,n) reaction 1285500100011 Energy spread of 5 keV from the Li-target 1285500100012 overall energy spread was about 7.5 keV. 1285500100013 MONITOR Zero degree time-flight-detector. 1285500100014 DETECTOR (SCIN) Two plastic scintillation detectors for TOF 1285500100015 energy separation one for 90 deg scattered neutron 1285500100016 detection and the other for monitoring incident 1285500100017 0 deg neutron flux. 1285500100018 Detector resolution was 3.5 ns. 1285500100019 SAMPLE Disks of 1 cm diameter and 0.15 cm thick. 1285500100020 O-187 sample enriched to 70%. 1285500100021 O-188 sample enriched to 94.5%. 1285500100022 ANALYSIS Scattering yields were converted to cross sections 1285500100023 by normalization to assumed isotopic scattering 1285500100024 cross sections and to determine anisotropy 1285500100025 coefficients. 1285500100026 Inelastic/elastic yield ratio and the assumed 1285500100027 scattering cross section were used to determine 1285500100028 the inelastic and the elastic scattering cross 1285500100029 sections for 187-Os. 1285500100030 Differential scattering data for both the samples 1285500100031 were measured to constrain the s- and p-wave 1285500100032 scattering amplitudes. 1285500100033 2-3% uncertainty in determining cross 1285500100034 sections was attributed to the non-availability 1285500100035 of measured cross sections for the minor isotopes 1285500100036 in the 187-Os and 188-Os samples used. 1285500100037 CORRECTION Energy dependent neutron detection efficiency 1285500100038 correction = 3.3%. 1285500100039 Multiple scattering corrections for elastic 1285500100040 and inelastic scattering = 12% for 187-Os. 1285500100041 STATUS (TABLE) Data taken from the journal article. 1285500100042 No reply to author proof. 1285500100043 HISTORY (19840119C) 1285500100044 (19860723A) BIB correction. 1285500100045 (20101025A) OS. Changed to lower case and 4 digit yrs, 1285500100046 data units in subentry 2 corrected. 1285500100047 ENDBIB 45 0 1285500100048 COMMON 3 3 1285500100049 EN EN-RSL EN-ERR 1285500100050 KEV KEV KEV 1285500100051 60.5 7.5 0.3 1285500100052 ENDCOMMON 3 0 1285500100053 ENDSUBENT 52 0 1285500199999 SUBENT 12855002 20101025 13671285500200001 BIB 3 5 1285500200002 REACTION ((76-OS-187(N,INL)76-OS-187,,SIG)/ 1285500200003 (76-OS-187(N,EL)76-OS-187,,SIG)) 1285500200004 ERR-ANALYS (ERR-S) Statistical uncertainties. 1285500200005 HISTORY (20101025A) OS. Data units changed from PER-CENT to 1285500200006 NO-DIM, values divided by 100 1285500200007 ENDBIB 5 0 1285500200008 NOCOMMON 0 0 1285500200009 DATA 2 1 1285500200010 DATA ERR-S 1285500200011 NO-DIM NO-DIM 1285500200012 0.075 0.005 1285500200013 ENDDATA 3 0 1285500200014 ENDSUBENT 13 0 1285500299999 SUBENT 12855003 20101025 13671285500300001 BIB 6 11 1285500300002 REACTION (76-OS-187(N,INL)76-OS-187,,SIG) 1285500300003 ANALYSIS Inelastic/elastic yield ratio and the assumed 1285500300004 scattering cross section were used to determine 1285500300005 the inelastic and the elastic scattering cross 1285500300006 sections for 187-Os. 1285500300007 ASSUMED (ASSUM1,76-OS-187(N,TOT),,SIG) 1285500300008 (ASSUM2,76-OS-187(N,G)76-OS-188,,SIG) 1285500300009 ERR-ANALYS (ERR-S) Statistical uncertainties. 1285500300010 COMMENT The extrapolated inelastic cross section at 30 keV 1285500300011 neutron energy=1.45 barn. 1285500300012 STATUS (DEP,12855002) 1285500300013 ENDBIB 11 0 1285500300014 NOCOMMON 0 0 1285500300015 DATA 4 1 1285500300016 DATA ERR-S ASSUM1 ASSUM2 1285500300017 B B B B 1285500300018 1.13 0.2 12.75 0.60 1285500300019 ENDDATA 3 0 1285500300020 ENDSUBENT 19 0 1285500399999 SUBENT 12855004 20101025 13671285500400001 BIB 5 12 1285500400002 REACTION (76-OS-187(N,EL)76-OS-187,,SIG) 1285500400003 ADD-RES Elastic scattering anisotropy was extracted from 1285500400004 the differential cross sections at 45, 90, and 135 1285500400005 degrees. 1285500400006 Anisotropy=0.11. 1285500400007 STATUS (DEP,12855002) 1285500400008 (DEP,12855003) 1285500400009 ANALYSIS Inelastic/elastic yield ratio and the assumed 1285500400010 scattering cross section were used to determine 1285500400011 the inelastic and the elastic scattering cross 1285500400012 sections for 187-Os. 1285500400013 ERR-ANALYS No information on uncertainties 1285500400014 ENDBIB 12 0 1285500400015 NOCOMMON 0 0 1285500400016 DATA 1 1 1285500400017 DATA 1285500400018 B 1285500400019 11.0 1285500400020 ENDDATA 3 0 1285500400021 ENDSUBENT 20 0 1285500499999 SUBENT 12855005 20101025 13671285500500001 BIB 4 10 1285500500002 REACTION ((76-OS-187(N,SCT)76-OS-187,,DA)/ 1285500500003 (76-OS-188(N,EL)76-OS-188,,DA)) 1285500500004 ADD-RES 188-Os elastic scattering anisotropy was extracted from1285500500005 the differential cross sections at 45, 90, and 135 1285500500006 degrees. 1285500500007 Anisotropy = 0.13+-0.02. 1285500500008 ERR-ANALYS (ERR-S) Statistical uncertainties. 1285500500009 STATUS (DEP,12855002) 1285500500010 (DEP,12855003) 1285500500011 (DEP,12855004) 1285500500012 ENDBIB 10 0 1285500500013 NOCOMMON 0 0 1285500500014 DATA 3 1 1285500500015 ANG DATA ERR-S 1285500500016 ADEG NO-DIM NO-DIM 1285500500017 90. 1.00 0.01 1285500500018 ENDDATA 3 0 1285500500019 ENDSUBENT 18 0 1285500599999 ENDENTRY 5 0 1285599999999