ENTRY 32679 20110902 31523267900000001 SUBENT 32679001 20110902 31523267900100001 BIB 14 58 3267900100002 TITLE Cross-section measurement and analysis for the 3267900100003 149Sm(n,a)146Nd reaction at 6.0 MeV 3267900100004 AUTHOR (Yu.M.Gledenov, Guohui Zhang, G.Khuukhenkhuu, 3267900100005 M.V.Sedysheva, P.J.Szalanski, P.E.Koehler, 3267900100006 Jiaming Liu, Hao Wu, Xiang Liu, Jinxiang Chen) 3267900100007 INSTITUTE (4ZZZDUB) Frank Laboratory of Neutron Physics 3267900100008 (3CPRBJG) State Key Laboratory of Nuclear Physics and 3267900100009 Technology,Institute of Heavy Ion Physics 3267900100010 (3MGLNUM) Nuclear Research Centre 3267900100011 (3POLLOU) Insitute of Physics 3267900100012 (1USAORL) Physics Division 3267900100013 REFERENCE (J,PR/C,82,(1),014601,2010) Data in text 3267900100014 #doi:10.1103/PhysRevC.82.014601 3267900100015 (J,KPS,59,1693,2011) Revised data in table 3267900100016 #doi:10.3938/jkps.59.1693 3267900100017 Revised data given in table 3267900100018 FACILITY (VDG,3CPRBJG) 4.5-MV Van de Graaff accelerator 3267900100019 INC-SOURCE (D-D) Fast neutrons were produced through the 3267900100020 D(d,n)4He reaction with a deuterium gas cell, 2.0 cm 3267900100021 in length and 0.9 cm in diameter. 3267900100022 The gas cell was separated from the beam-line vacuum 3267900100023 by a molybdenum foil 5.0 um in thickness. 3267900100024 The deuterium gas pressure was 3.1-2.9 atm. 3267900100025 The total neutron source intensity was about 3267900100026 3.1x10**8/s. 3267900100027 DETECTOR (IOCH) A two-section gridded ionization chamber was 3267900100028 used as the charged particle detector. 3267900100029 Distances from the cathode to grid and from the grid 3267900100030 to anode were 75 and 18 mm, respectively. 3267900100031 The working gas mixture was Kr+2.85%CO2, the 3267900100032 pressure of the working gas was 2.0 atm. 3267900100033 (BF3) A BF3 long counter was used as a neutron flux 3267900100034 monitor. 3267900100035 The distance between the gas cell and the detector 3267900100036 was about 3.0 m. 3267900100037 PART-DET (A) Alphas 3267900100038 SAMPLE (62-SM-149,ENR=0.946) 3267900100039 Two circular 149Sm2O3 samples (The diameters of both 3267900100040 were 11.5 cm, the thicknesses of the forward and 3267900100041 backward were 0.739 and 1.236 mg/cm2) placed back- 3267900100042 to-back on the cathode of the ionization chamber. 3267900100043 The aluminum backings foils were 0.10 mm in thickness.3267900100044 MONITOR (92-U-238(N,F),,SIG) 3267900100045 The absolute neutron flux was determined by a small 3267900100046 parallel plate 238U fission chamber. 3267900100047 MONIT-REF (,,3,ENDF/B-VII.0,9237,2006) 3267900100048 ERR-ANALYS Uncertainties taken from Phys.Rev.C82(2010)014601 3267900100049 (ERR-T) Total uncertainty in cross section (15%)3267900100050 (ERR-S) Number of alpha events (13.5%)3267900100051 (ERR-1) Fission counts (2.0%)3267900100052 (ERR-2) 238U/147Sm2O3 neutron flux density ratio (3.0%)3267900100053 (ERR-3) Atom number of 147Sm (1.5%)3267900100054 (ERR-4) Atom number of 238U (1.3%)3267900100055 (MONIT-ERR) 238U fission cross section (1.0%) 3267900100056 STATUS (TABLE) Table 2 of J.Kor.Phys.Soc.59(2011)1693 3267900100057 (APRVD) Proof-read by Zhang Guohui (2011-09-04) 3267900100058 HISTORY (20100925C) Compiled by Jimin WANG 3267900100059 (20110902A) On. REFERENCE: KPS added 3267900100060 ENDBIB 58 0 3267900100061 COMMON 6 3 3267900100062 ERR-S ERR-1 ERR-2 ERR-3 ERR-4 MONIT-ERR 3267900100063 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3267900100064 13.5 2.0 3.0 1.5 1.3 1.0 3267900100065 ENDCOMMON 3 0 3267900100066 ENDSUBENT 65 0 3267900199999 SUBENT 32679002 20110902 31523267900200001 BIB 2 2 3267900200002 REACTION (62-SM-149(N,A)60-ND-146,,SIG) 3267900200003 HISTORY (20110902A) On. ERR-T updated, MONIT from author added 3267900200004 ENDBIB 2 0 3267900200005 NOCOMMON 0 0 3267900200006 DATA 5 1 3267900200007 EN EN-ERR DATA ERR-T MONIT 3267900200008 MEV MEV MB MB MB 3267900200009 6.0 0.12 0.12 0.02 610.79 3267900200010 ENDDATA 3 0 3267900200011 ENDSUBENT 10 0 3267900299999 ENDENTRY 2 0 3267999999999