ENTRY 32784 20211104 32063278400000001 SUBENT 32784001 20211104 32063278400100001 BIB 16 59 3278400100002 TITLE Measurement of the cross sections for 238U(n,g)239U 3278400100003 reaction in the energy range of 14.1-14.8 MeV using 3278400100004 neutron activation method 3278400100005 AUTHOR (Qiang Wang,Tong Liu,Yijia Qiu,Changlin Lan, 3278400100006 Bingjun Chen,Qian Zhang,Xuwen Zhan,Kaihong Fang) 3278400100007 INSTITUTE (3CPRLNZ) 3278400100008 REFERENCE (J,RPC,152,125,2018) 3278400100009 #doi:10.1016/j.radphyschem.2018.08.013 3278400100010 FACILITY (NGEN,3CPRNPC) K-400 Intense Neutron Generator 3278400100011 SAMPLE Three targets (UO2(NO3)2 powder of 99% or more purity) 3278400100012 and monitors (aluminum foil of 99.99% purity, 0.05 mm 3278400100013 thick) were made into circular disks with diameters of 3278400100014 13.4 mm, 13.8 mm and 14.4 mm respectively. 3278400100015 The thickness of the UO2(NO3)2 samples were 4.3 mm, 3278400100016 4.5 mm and 5.4 mm, respectively. 3278400100017 DETECTOR (SIBAR) The Au-Si surface barrier detector used at 3278400100018 135 deg, accompanying the alpha-particle tube, was at 3278400100019 a distance of 110 cm from the target. 3278400100020 (HPGE) A coaxial GMX60 HPGe detector (ORTEC, made in 3278400100021 USA) with a relative efficiency of 68% and an energy 3278400100022 resolution of 1.82 keV FWHM at 1.33 MeV. The 3278400100023 calibration of point source efficiency is done by 3278400100024 152Eu,137Cs and 60Co standard point sources. 3278400100025 METHOD (ACTIV,GSPEC) Three sandwiches of Al-U-Al were mounted 3278400100026 at 0, 45 and 90 deg angles respectively, relative to 3278400100027 the deuteron beam direction and centered about the 3278400100028 tritium-titanium target at distances of 50 mm. In 3278400100029 order to prevent the scattered thermal neutrons, a 3278400100030 cadmium foil was covered the sandwich sample during 3278400100031 the irradiation. The samples were irradiated for 70 3278400100032 min and cooled for about 3 h. The gamma-activities 3278400100033 of the irradiated UO2(NO3)2 and Al samples were 3278400100034 measured off-line. 3278400100035 MONITOR (13-AL-27(N,A)11-NA-24,,SIG) 3278400100036 DECAY-MON (11-NA-24,14.997HR,DG,1368.6,0.999936) 3278400100037 MONIT-REF (,,3,ENDF/B-VIII.0,1325,2018) 3278400100038 INC-SOURCE (D-T) Neutrons with a yield of about 5E10 n/s. The 3278400100039 ion beam current was about 230 uA with effective 3278400100040 deuteron energy of 134 keV. 3278400100041 CORRECTION The total correction factor mainly includes the 3278400100042 self-absorption of the sample at a given gamma-ray 3278400100043 energy, the coincidence sum effect of cascade 3278400100044 gamma-rays in the investigated nuclide and in the 3278400100045 counting geometry. 3278400100046 ERR-ANALYS (ERR-T) Total uncertainty 3278400100047 (ERR-S,,3.) Counting statistics (< 3%) 3278400100048 (ERR-1) Detector efficiency (3%) 3278400100049 (ERR-2) Self-absorption of gamma-ray (1%) 3278400100050 (ERR-3) Coincidence summing effect of cascade gamma- 3278400100051 rays (1%) 3278400100052 (ERR-4) Neutron energy and fluency uncertainties (2.5%)3278400100053 (ERR-5,,0.1) Weight of samples (< 0.1%) 3278400100054 (ERR-6) Sample geometry (1%) 3278400100055 (ERR-7,,0.8) The irradiation,cooling and measuring 3278400100056 times (< 0.8%) 3278400100057 (MONIT-ERR) Monitor reaction cross section (1.5%) 3278400100058 STATUS (TABLE) Data were obtained from Table 2 of Radiation 3278400100059 Physics and Chemistry,152,125,2018. 3278400100060 HISTORY (20211104C) Compiled by Changlin Lan (Lanzhou Univ.) 3278400100061 ENDBIB 59 0 3278400100062 COMMON 6 3 3278400100063 ERR-1 ERR-2 ERR-3 ERR-4 ERR-6 MONIT-ERR 3278400100064 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3278400100065 3. 1. 1. 2.5 1. 1.53278400100066 ENDCOMMON 3 0 3278400100067 ENDSUBENT 66 0 3278400199999 SUBENT 32784002 20211104 32063278400200001 BIB 2 2 3278400200002 REACTION (92-U-238(N,G)92-U-239,,SIG) 3278400200003 DECAY-DATA (92-U-239,23.45MIN,DG,74.7,0.532) 3278400200004 ENDBIB 2 0 3278400200005 NOCOMMON 0 0 3278400200006 DATA 5 3 3278400200007 EN EN-ERR DATA ERR-T MONIT 3278400200008 MEV MEV MB MB MB 3278400200009 14.1 0.3 1.631 0.075 121.2 3278400200010 14.5 0.3 1.384 0.063 116.0 3278400200011 14.8 0.3 1.216 0.057 112.1 3278400200012 ENDDATA 5 0 3278400200013 ENDSUBENT 12 0 3278400299999 ENDENTRY 2 0 3278499999999