ENTRY 32805 20210104 32003280500000001 SUBENT 32805001 20210104 32003280500100001 BIB 16 67 3280500100002 TITLE Ground-state and isomeric-state cross-sections for 3280500100003 74Se(n,2n)73Se reaction in the 13-15 MeV energy region 3280500100004 AUTHOR (Junhua Luo,Li Jiang) 3280500100005 INSTITUTE (3CPRHXU,3CPRNPC) 3280500100006 REFERENCE (J,EPJ/A,56,125,2020) 3280500100007 #doi:10.1140/epja/s10050-020-00136-6 3280500100008 FACILITY (NGEN,3CPRNPC) K-400 neutron generator at Chinese 3280500100009 Academy of Engineering Physics (CAEP) 3280500100010 INC-SOURCE (D-T) Neutrons with a yield about 3 to 4E10 n/s were 3280500100011 generated with an effective deuteron beam energy of 3280500100012 136 keV and a beam current of 280 uA. The T-Mo target 3280500100013 used in the generator had a thickness of 0.566 mg/cm2 3280500100014 and an active zone diameter of 1.2 cm. 3280500100015 SAMPLE (34-SE-74,NAT=0.0089) 14 g of high purity Se powder 3280500100016 was pressed at 10 ton/cm2, and a pellet of 0.3 cm 3280500100017 thickness and 2.0 cm in diameter was obtained. A 3280500100018 total of three such pellets were prepared. Monitor 3280500100019 foils (Nb, 99.99% pure, 0.5 mm thick) having the same 3280500100020 diameter as the pellets, were then attached in the 3280500100021 front and at the back of each sample. 3280500100022 METHOD (ACTIV) The entire process of irradiation for all the 3280500100023 three samples lasted about 60-90 min. The three 3280500100024 samples were placed at 0, 90, and 135 deg angles 3280500100025 respectively, relative to the beam direction and 3280500100026 centred with respect to the tritium-molybdenum (T-Mo) 3280500100027 target at a distance of about 4 cm. 3280500100028 DETECTOR (HPGE) A HPGe detector with a relative efficiency of 3280500100029 about 68 % and an energy resolution of 1.69 keV at 3280500100030 1332 keV for 60Co. The distance from sample to 3280500100031 detector was 4.0-8.0 cm. The efficiency of the 3280500100032 detector was pre-calibrated using various standard 3280500100033 gamma sources like Co-57, Co-60, Cd-109, Ba-133, 3280500100034 Cs-137, Eu-152, Am-241, and Ra-226. 3280500100035 (SIBAR) The neutron-flux was monitored by the 3280500100036 accompanying alpha-particles to facilitate 3280500100037 corrections for small variations in the yield. The 3280500100038 Au-Si surface barrier detector used in 135 deg 3280500100039 irradiation accompanying alpha-particle tube was set 3280500100040 at a distance of 110 cm from the tritium target. 3280500100041 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3280500100042 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3280500100043 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,,1990) 3280500100044 CORRECTION The total correction factor of the activity is given 3280500100045 by F = fs*fc*fg. fs, fc, and fg are the correction 3280500100046 factors for the selfabsorption of the sample for a 3280500100047 given gamma energy, the coincident sum-effect of 3280500100048 cascade gamma-rays in the investigated nuclide and in 3280500100049 the counting geometry. Correction factors for the 3280500100050 self-absorption of the sample at 253.7 and 361.2 keV 3280500100051 gamma-rays are 1.083, 1.069 for sample 1 (0.3492 cm), 3280500100052 1.062, 1.051 for sample 2 (0.2621 cm), and 1.083, 3280500100053 1.069 for sample 3 (0.3492 cm). 3280500100054 ERR-ANALYS (ERR-T) Total uncertainty 3280500100055 (ERR-S,0.2,16.4) Counting statistics 0.2-16.4% 3280500100056 (ERR-1) Detector efficiency 3% 3280500100057 (ERR-2,,0.1) Sample weight <0.1% 3280500100058 (ERR-3) Self-absorption of gamma-rays about 1% 3280500100059 (ERR-4,0.1,8.1) Relative gamma-ray intensity 0.1-8.1% 3280500100060 (ERR-5,1.1,3.3) Half-life 1.1-3.3% 3280500100061 (ERR-6) Isotopic abundance 4.5% 3280500100062 (ERR-7) Cooling and measuring times 0.1% 3280500100063 (ERR-8) Sample geometry about 1% 3280500100064 (ERR-9) Fluctuation of the neutron flux about 1% 3280500100065 (ERR-10) Standard cross-sections uncertainties 1.5% 3280500100066 STATUS (TABLE) Data were obtained from TABLE 5 and text in 3280500100067 P.125 of Eur.Phys.J.A,56,125,2020. 3280500100068 HISTORY (20210104C) Compiled by Xi Tao (CNDC) 3280500100069 ENDBIB 67 0 3280500100070 COMMON 7 6 3280500100071 ERR-1 ERR-3 ERR-6 ERR-7 ERR-8 ERR-9 3280500100072 ERR-10 3280500100073 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3280500100074 PER-CENT 3280500100075 3. 1. 4.5 0.1 1. 1.3280500100076 1.5 3280500100077 ENDCOMMON 6 0 3280500100078 ENDSUBENT 77 0 3280500199999 SUBENT 32805002 20210104 32003280500200001 BIB 2 6 3280500200002 REACTION 1(34-SE-74(N,2N)34-SE-73-M,,SIG) 3280500200003 2(34-SE-74(N,2N)34-SE-73-G,,SIG) 3280500200004 3(34-SE-74(N,2N)34-SE-73,,SIG) 3280500200005 4(34-SE-74(N,2N)34-SE-73-M/G,,SIG/RAT) 3280500200006 DECAY-DATA1(34-SE-73-M,39.8MIN,DG,253.7,0.0236) 3280500200007 2(34-SE-73-G,7.15HR,DG,361.2,0.970) 3280500200008 ENDBIB 6 0 3280500200009 NOCOMMON 0 0 3280500200010 DATA 10 3 3280500200011 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23280500200012 DATA 3ERR-T 3DATA 4ERR-T 4 3280500200013 MEV MEV MB MB MB MB 3280500200014 MB MB NO-DIM NO-DIM 3280500200015 13.5 0.2 79. 12. 151. 11.3280500200016 230. 17. 0.5 0.1 3280500200017 14.1 0.2 144. 22. 219. 19.3280500200018 363. 30. 0.7 0.2 3280500200019 14.8 0.2 227. 35. 289. 24.3280500200020 516. 43. 0.8 0.2 3280500200021 ENDDATA 10 0 3280500200022 ENDSUBENT 21 0 3280500299999 ENDENTRY 2 0 3280599999999