ENTRY 21184 20110227 22262118400000001 SUBENT 21184001 20110227 22262118400100001 BIB 13 30 2118400100002 INSTITUTE (2UK HAR) 2118400100003 REFERENCE (J,JNE,4,33,1957) 2118400100004 AUTHOR (K.L.Aitken,D.J.Littler,E.E.Lockett,G.H.Palmer) 2118400100005 TITLE -The pile-neutron absorption cross-section of 2118400100006 samarium-149- 2118400100007 FACILITY (OSCIP,2UK HAR) Pile oscillator. 2118400100008 INC-SOURCE (REAC) GLEEP reactor at AERE. 2118400100009 INC-SPECT .Pile spectrum of the GLEEP reactor. 2118400100010 SAMPLE .Concentrated solution of Sm2-SO4 in D2-O made from 2118400100011 spectroscopically standardised samarium oxide. 2118400100012 METHOD .Comparison of effect of samarium and Harwell standard 2118400100013 boron in pile oscillator, by oscillating an aluminium 2118400100014 sample which had previously been standardised against 2118400100015 boron. 2118400100016 DETECTOR .No details. 2118400100017 MONITOR (5-B-0(N,ABS),,SIG) 766+-5 b at 2200 m/sec, average 2118400100018 of previous measurements: 2118400100019 MONIT-REF (21196002,P.A.Egelstaff,J,JNE,5,41,1957) 771.+- 5b 2118400100020 (21133002,C.H.Collie+,J,PPS/A,69,464,1956) 2118400100021 authors used unpublished result: 760.+-3b 2118400100022 Swedish value : 776.+- 4b 2118400100023 US value: 759.+- 5b 2118400100024 HISTORY (19791116T) 2118400100025 (19800110E) 2118400100026 (19810115A) DATA-ERR headings corrected. 2118400100027 (19810120E) 2118400100028 (20110227A) SD:Updated to new date formats,lower case. 2118400100029 corrected according to last EXFOR rules and Dict. 2118400100030 In Subent 002 SF1 in REACTION code corrected: 2118400100031 Sm-149 => Sm-0 2118400100032 ENDBIB 30 0 2118400100033 COMMON 3 3 2118400100034 EN-DUMMY MONIT MONIT-ERR 2118400100035 EV B B 2118400100036 2.5300E-02 7.6600E+02 5.0000E+00 2118400100037 ENDCOMMON 3 0 2118400100038 ENDSUBENT 37 0 2118400199999 SUBENT 21184002 20110227 22262118400200001 BIB 4 9 2118400200002 REACTION 1((62-SM-0(N,G),,SIG,,MXW)/ 2118400200003 (5-B-0(N,ABS),,SIG)) Ratio of pile average 2118400200004 cross-section to boron 2200 m/sec cross-section. 2118400200005 2(62-SM-0(N,G),,SIG,,MXW) 2118400200006 STATUS (TABLE) .Data from text of JNE,4,33,1957 2118400200007 CORRECTION .Correction for rare earth impurities in the sample 2118400200008 solution, estimated to be 7.524 mg/ml. 2118400200009 HISTORY (20110223A) SD: SF1 in REACTION code corrected: 2118400200010 Sm-149 => Sm-0; ARB-UNITS => NO-DIM 2118400200011 ENDBIB 9 0 2118400200012 NOCOMMON 0 0 2118400200013 DATA 4 1 2118400200014 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 2118400200015 NO-DIM NO-DIM B B 2118400200016 1.3330E+01 1.8000E-01 1.0380E+04 1.6000E+02 2118400200017 ENDDATA 3 0 2118400200018 ENDSUBENT 17 0 2118400299999 SUBENT 21184003 20110227 22262118400300001 BIB 5 15 2118400300002 REACTION (62-SM-149(N,G)62-SM-150,,SIG,,MXW) 2118400300003 ANALYSIS .Data derived from cross-section for natural Sm by 2118400300004 attributing all absorption to Sm-149 at thermal 2118400300005 energies. This assumption was verified by irradiating 2118400300006 samarium sulphate in the NRX pile at Chalk River and 2118400300007 analysing with a mass spectrometer to confirm that 2118400300008 the only significant change was the conversion of 2118400300009 mass 149 to mass 150. 2118400300010 .Sm-149 content of natural sample 13.82+-0.04%. 2118400300011 STATUS (TABLE) .Data from text of JNE,4,33,1957 2118400300012 (DEP,21184002) 2118400300013 HISTORY (19791119T) 2118400300014 CORRECTION .Correction for epithermal absorption by Sm-147 and 2118400300015 Sm-152 in the pile spectrum due to resonances at 2118400300016 3.4 and 8 eV respectively, estimated to be 88 b. 2118400300017 ENDBIB 15 0 2118400300018 NOCOMMON 0 0 2118400300019 DATA 2 1 2118400300020 DATA DATA-ERR 2118400300021 B B 2118400300022 7.4500E+04 1.1000E+03 2118400300023 ENDDATA 3 0 2118400300024 ENDSUBENT 23 0 2118400399999 ENDENTRY 3 0 2118499999999