ENTRY 32795 20210108 32003279500000001 SUBENT 32795001 20210108 32003279500100001 BIB 15 43 3279500100002 TITLE Measurements of fast neutron capture cross section 3279500100003 for 180Hf 3279500100004 AUTHOR (Fengqun Zhou,Yueli Song,Yong Li,Xiaojun Sun, 3279500100005 Xinyi Chang) 3279500100006 INSTITUTE (3CPRPDU) 3279500100007 REFERENCE (J,NIM/B,451,24,2019) 3279500100008 #doi:10.1016/j.nimb.2019.04.084 3279500100009 FACILITY (NGEN,3CPRNPC) K-400 Intense Neutron Generator 3279500100010 INC-SOURCE (D-T) Neutrons in 14 MeV region with a yield of about 3279500100011 5E10 n/s. Deuteron beam energy was 255 keV and beam 3279500100012 current was 350 uA. The solid T-Ti target used in the 3279500100013 generator was about 2.19 mg/cm2 thick. 3279500100014 SAMPLE (72-HF-180,NAT=0.3508) The natural hafnium foils of 3279500100015 99.99% purity and 3 mm thickness were made into 3279500100016 circular samples with a diameter of 2.0 cm. Each of 3279500100017 them was sandwiched between two disks of thin niobium 3279500100018 (99.99% purity and 1 mm thickness) of the same 3279500100019 diameter, and was then wrapped in 1mm thick cadmium 3279500100020 foil (purity better than 99.95%). Groups of samples 3279500100021 were placed at 0, 45, 90 and 135 deg angles relative 3279500100022 to the deuteron beam direction. The distances of 3279500100023 samples from the center of the T-Ti target were about 3279500100024 3-5 cm. 3279500100025 DETECTOR (HPGE) A well-calibrated GEM-60P coaxial high-purity 3279500100026 germanium (HPGe) detector (crystal diameter 70.1 mm, 3279500100027 crystal length 72.3 mm) with a relative efficiency of 3279500100028 about 68% and an energy resolution of 1.69 keV at 3279500100029 1.332 MeV was used to measure the gamma-ray activities.3279500100030 METHOD (ACTIV) The irradiation time was 17 h. 3279500100031 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3279500100032 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3279500100033 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,,1990) 3279500100034 ERR-ANALYS (ERR-T) Total uncertainty 3279500100035 (ERR-S,0.7,1.3) Counting statistics 0.7-1.3% 3279500100036 (ERR-1) Detector efficiency 2% 3279500100037 (ERR-2) Weight of samples 0.1% 3279500100038 (ERR-3) Sample geometry 1% 3279500100039 (ERR-4) Self-absorption of gamma-ray 1.0% 3279500100040 (ERR-5) Fluctuation of the neutron flux 1% 3279500100041 (MONIT-ERR) Standard cross sections uncertainties 1.1- 3279500100042 1.5% 3279500100043 STATUS (TABLE) TABLE 2 of J.Nucl.Instr.Meth.B,451,24,2019 3279500100044 HISTORY (20210108C) Compiled by Xi Tao(CNDC) 3279500100045 ENDBIB 43 0 3279500100046 COMMON 5 3 3279500100047 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 3279500100048 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3279500100049 2. 0.1 1. 1.0 1. 3279500100050 ENDCOMMON 3 0 3279500100051 ENDSUBENT 50 0 3279500199999 SUBENT 32795002 20210108 32003279500200001 BIB 2 2 3279500200002 REACTION (72-HF-180(N,G)72-HF-181,,SIG) 3279500200003 DECAY-DATA (72-HF-181,42.39D,DG,482.18,0.805) 3279500200004 ENDBIB 2 0 3279500200005 NOCOMMON 0 0 3279500200006 DATA 6 4 3279500200007 EN EN-ERR DATA ERR-T MONIT MONIT-ERR 3279500200008 MEV MEV MB MB MB MB 3279500200009 13.5 0.3 11.9 0.6 457.9 6.83279500200010 14.1 0.2 11.8 0.6 459.8 6.83279500200011 14.4 0.3 10.4 0.5 459.8 6.83279500200012 14.8 0.2 12.3 0.6 459.7 5.03279500200013 ENDDATA 6 0 3279500200014 ENDSUBENT 13 0 3279500299999 ENDENTRY 2 0 3279599999999