ENTRY 32698 20120616 31573269800000001 SUBENT 32698001 20120616 31573269800100001 BIB 16 51 3269800100002 TITLE 149Sm(n,a)146Nd Cross Sections in the MeV Region 3269800100003 AUTHOR (Guohui Zhang,Yu.M.Gledenov,G.Khuukhenkhuu, 3269800100004 M.V.Sedysheva,P.J.Szalanski,P.E.Koehler,Yu.N.Voronov, 3269800100005 Jiaming Liu,Xiang Liu,Jinhua Han,Jinxiang Chen) 3269800100006 INSTITUTE (3CPRBJG,4ZZZDUB,3MGLNUM,3POLLOU,1USAORL) 3269800100007 REFERENCE (J,PRL,107,(25),252502,2011) 3269800100008 #doi:10.1103/PhysRevLett.107.252502 3269800100009 REL-REF (N,32679002,Yu.M.Gledenov+,J,PR/C,82,014601,2010) 3269800100010 Another measurement of the same reaction. 3269800100011 FACILITY (VDG,3CPRBJG) 4.5 MV Van de Graaff accelerator. 3269800100012 INC-SOURCE (D-D) The length of the deuterium gas cell was 1.80 cm.3269800100013 DETECTOR (IOCH) Double-section gridded ionization chamber was 3269800100014 used as the alpha particles detector, two 149Sm2O3 3269800100015 samples were attached back to back on the common 3269800100016 cathode. 3269800100017 (BF3) A BF3 long counter was used to monitor the 3269800100018 neutron flux. 3269800100019 (FISCH) Absolute neutron flux was determined using the 3269800100020 small 238U fission chamber by counting the fission 3269800100021 fragments. 3269800100022 SAMPLE (62-SM-149,ENR=0.946) Sample material was 149Sm2O3,and 3269800100023 the purity was 99.96%. The thicknesses of the forward 3269800100024 and backward samples were 4.72 and 3.97 mg/cm2, 3269800100025 respectively, and the diameter of both samples were 3269800100026 11.5 cm. 3269800100027 (92-U-238,ENR=0.99997) Sample material was 238U3O8. 3269800100028 The thickness and diameter of the 238U sample were 3269800100029 0.174 mg/cm2 (238U only) and 2.0 cm. 3269800100030 METHOD (FLUX) 3269800100031 PART-DET (A,FF) Alpha particles and fission fragments. 3269800100032 ERR-ANALYS (ERR-T) Total uncertainty of the cross sections 3269800100033 including the uncertainty of monitor reaction 3269800100034 cross sections. 3269800100035 (ERR-1) Uncertainty of the number of alpha events are 3269800100036 come from: 3269800100037 1) Counting statistics of the alpha counts 3269800100038 above the threshold is 4.5-9%; 3269800100039 2) Threshold location is 6%; 3269800100040 3) The uncertainty is 20-25% for the fraction 3269800100041 of alpha events below threshold in total alpha 3269800100042 events. 3269800100043 (ERR-2) 238U fission counts 3269800100044 (ERR-3) Ratio of neutron fluxes 3269800100045 (ERR-4) Number of atoms in the 149Sm samples 3269800100046 (ERR-5) Number of atoms in the 238U samples 3269800100047 (MONIT-ERR) 238U fission cross section 3269800100048 MONITOR (92-U-238(N,F),,SIG) 3269800100049 MONIT-REF (,,3,ENDF/B-VII.0,9237,2006) 3269800100050 STATUS (TABLE) Data taken from Table 3 of J,PRL,107,(25), 3269800100051 252502,2011. 3269800100052 HISTORY (20120616C)Compiled by Jimin WANG (CNDC) 3269800100053 ENDBIB 51 0 3269800100054 COMMON 5 3 3269800100055 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 3269800100056 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3269800100057 17.0 2.5 2.5 1.5 1.3 3269800100058 ENDCOMMON 3 0 3269800100059 ENDSUBENT 58 0 3269800199999 SUBENT 32698002 20120616 31573269800200001 BIB 1 1 3269800200002 REACTION (62-SM-149(N,A)60-ND-146,,SIG) 3269800200003 ENDBIB 1 0 3269800200004 NOCOMMON 0 0 3269800200005 DATA 6 5 3269800200006 EN EN-RSL DATA ERR-T MONIT MONIT-ERR 3269800200007 MEV MEV MB MB MB MB 3269800200008 4.5 0.19 0.049 0.009 559.34 0.75 3269800200009 5.0 0.16 0.057 0.010 546.71 0.73 3269800200010 5.5 0.14 0.084 0.015 546.34 0.80 3269800200011 6.0 0.12 0.10 0.02 610.79 0.87 3269800200012 6.5 0.10 0.19 0.03 815.80 0.85 3269800200013 ENDDATA 7 0 3269800200014 ENDSUBENT 13 0 3269800299999 ENDENTRY 2 0 3269899999999