ENTRY 32740 20161108 31773274000000001 SUBENT 32740001 20161108 31773274000100001 BIB 14 46 3274000100002 TITLE Cross-section measurement for the 206Pb(n,a)203Hg 3274000100003 reaction induced by neutrons around 14 MeV 3274000100004 AUTHOR (Shuqing Yuan, Yueli Song, Fengqun Zhou, Yong Li, 3274000100005 Mingli Tian, Changlin Lan) 3274000100006 INSTITUTE (3CPRPDU,3CPRLNZ) 3274000100007 REFERENCE (J,NIM/B,349,130,2015) 3274000100008 #doi:10.1016/j.nimb.2015.02.045 3274000100009 FACILITY (NGEN,3CPRLNZ) ZF-300-II Intense Neutron Generator 3274000100010 INC-SOURCE (D-T)The neutrons with the yield of about 1 to 3E12 3274000100011 n/s, were produced by d-T reaction with an effective 3274000100012 deuteron beam energy and current of 125 keV and 20 3274000100013 mA. The thickness of the tritium-titanium (T-Ti) 3274000100014 target was 0.9 mg/cm2. 3274000100015 SAMPLE (82-PB-206,NAT=0.241) The natural lead foils of 3274000100016 99.99% purity and 0.25 mm thickness were made into 3274000100017 circular samples with a diameter of 20 mm. Each of 3274000100018 them was sandwiched between natural niobium foils of 3274000100019 the same diameter, all the niobium foils with 3274000100020 purities better than 99.9% and 0.2 mm in thickness. 3274000100021 DETECTOR (HPGE) Gamma-ray activities of the residual nuclei 3274000100022 were measured by a CH8403 coaxial HPGe detector with 3274000100023 sensitive volume 110 cm3 and relative efficiency of 3274000100024 20% and energy resolution of 3 keV at 1.33 MeV. 3274000100025 (FISCH) Used to monitor the neutron yield fluctuation. 3274000100026 METHOD (ACTIV) The Lead samples were measured after having 3274000100027 been cooled for more than 18 times of the half-life 3274000100028 of Pb-203g (51.873 h) to avoid the effect of the 3274000100029 gamma-ray (279.1967 keV) from Pb-203g. 3274000100030 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,1990) 3274000100031 ERR-ANALYS (ERR-T)Total uncertainty (7.1-8.9%) 3274000100032 (ERR-S,0.5,7.58)Counting statistics (0.5-7.58%) 3274000100033 (ERR-1)Self-absorption of gamma-rays (1.0%) 3274000100034 (ERR-2,0.1,0.15)Weight of samples (0.1-0.15%) 3274000100035 (ERR-3)Efficiency of gamma-ray full energy peak (1.5%) 3274000100036 (ERR-4)Coincidence summing effect of cascade gamma- 3274000100037 rays (1.0%) 3274000100038 (ERR-5)Sample geometry (1.0%) 3274000100039 (ERR-6)Fluctuation of the neutron flux (1.0%) 3274000100040 (MONIT-ERR)Standard cross section (3.0%) 3274000100041 CORRECTION Corrections were made for gamma-ray self-absorption 3274000100042 in the sample, for gamma-ray coincidence summing 3274000100043 effects, for fluctuation of the neutron flux during 3274000100044 the irradiation and for sample geometry. 3274000100045 STATUS (TABLE) Data were obtained from TABLE 2 of 3274000100046 J,NIM/B,349,130,2015 3274000100047 HISTORY (20161108C) Compiled by Tao Xi (CNDC) 3274000100048 ENDBIB 46 0 3274000100049 COMMON 5 3 3274000100050 ERR-1 ERR-3 ERR-4 ERR-5 ERR-6 3274000100051 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3274000100052 1.0 1.5 1.0 1.0 1.0 3274000100053 ENDCOMMON 3 0 3274000100054 ENDSUBENT 53 0 3274000199999 SUBENT 32740002 20161108 31773274000200001 BIB 5 9 3274000200002 REACTION (82-PB-206(N,A)80-HG-203,,SIG) 3274000200003 DECAY-DATA (80-HG-203,46.612D,DG,279.1967,0.8146) 3274000200004 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3274000200005 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9907) 3274000200006 CRITIQUE By compiler: 3274000200007 The cross sections are higher than those in the 3274000200008 literature. This could be due to interference by the 3274000200009 284.1 keV gamma-line (Ig=10%) of 205Pb from 3274000200010 206Pb(n,2n)205Pb reaction. 3274000200011 ENDBIB 9 0 3274000200012 NOCOMMON 0 0 3274000200013 DATA 6 3 3274000200014 EN EN-RSL DATA ERR-T MONIT MONIT-ERR 3274000200015 MEV MEV MB MB MB MB 3274000200016 13.5 0.2 0.99 0.07 456.6 13.73274000200017 14.4 0.2 1.23 0.11 459.8 13.83274000200018 14.7 0.2 1.39 0.12 459.6 13.83274000200019 ENDDATA 5 0 3274000200020 ENDSUBENT 19 0 3274000299999 ENDENTRY 2 0 3274099999999