ENTRY 32733 20170818 31803273300000001 SUBENT 32733001 20170818 31803273300100001 BIB 16 64 3273300100002 TITLE Cross section of (n,2n) reaction on the low-abundance 3273300100003 isotopes 156,158Dy at 13.5 and 14.8 MeV 3273300100004 AUTHOR (Junhua Luo, Li An, Li Jiang) 3273300100005 INSTITUTE (3CPRHXU,3CPRNPC) 3273300100006 REFERENCE (J,JRN,308,649,2016) 3273300100007 FACILITY (NGEN,3CPRNPC) PD-300 neutron generator 3273300100008 SAMPLE The samples were made from natural Dy2O3 (99.995% 3273300100009 purity) powder, and pellets, about 0.2 cm in 3273300100010 thickness and 20 mm in diameter were obtained using 3273300100011 the press method (10 t/cm2). Two such pellets were 3273300100012 prepared. The samples were sandwiched between two 3273300100013 standard Nb foils (99.999% purity, 0.5 mm thickness 3273300100014 each) of the same diameter utilized to monitor the 3273300100015 neutron fluence via the 93Nb(n,2n)92mNb reaction. 3273300100016 INC-SOURCE (D-T) A T-Ti target was used in the generator, with a 3273300100017 thickness of 2.40 mg/cm2, and the diameter of the 3273300100018 active zone was 12 mm. An effective deuteron beam 3273300100019 energy of 134 keV and beam current of 260 uA. 3273300100020 DETECTOR (HPGE) High-purity germanium (HPGe) detector (ORTEC, 3273300100021 model GEM 60P, crystal diameter: 70.1 mm, crystal 3273300100022 length: 72.3 mm) with a relative efficiency of about 3273300100023 68% and an energy resolution of 1.69 keV at 1.332 MeV 3273300100024 for 60Co. The efficiency of the detector was 3273300100025 pre-calibrated using various standard gamma sources, 3273300100026 namely 57Co, 60Co, 109Cd, 133Ba, 137Cs, 152Eu, 241Am 3273300100027 and 226Ra. 3273300100028 (SIBAR) An Au-Si surface barrier detector was located 3273300100029 at 135 degree to accompany the a-particle tube placed 3273300100030 at a distance of 1.10 m from the target. 3273300100031 METHOD (ACTIV) Irradiation of the samples was lasted about 3273300100032 60 min with a neutron yield about 3 to 4E10 3273300100033 n/(4pi*s). The groups of samples were placed at 0 or 3273300100034 135 degree angles relative to the beam direction and 3273300100035 were centered about the tritium-titanium (T-Ti) 3273300100036 target at distances of about 40 mm. 3273300100037 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3273300100038 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) ) 3273300100039 J.Luo (2017-06-13): 3273300100040 T1/2=10.152 d in the article is typo and should read 3273300100041 10.15(2) d which was used in the cross section 3273300100042 calculation. 3273300100043 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,1990) The cross sections 3273300100044 for the 93Nb(n,2n)92mNb monitor reaction were 3273300100045 obtained by interpolating the evaluated values 3273300100046 reported by Wagner et al. 3273300100047 CORRECTION Corrections were made for the self-absorption of the 3273300100048 sample at a given gamma-energy, in the counting 3273300100049 geometry, and the coincidence sum effect of cascade 3273300100050 gamma-rays in the investigated nuclide (155Dy and 3273300100051 157Dy). 3273300100052 ERR-ANALYS (ERR-T) The total uncertainty. Uncertainty analysis 3273300100053 was carried out using the quadrature method. 3273300100054 (ERR-1,1.0,6.1) Counting statistics 1.0-6.1% 3273300100055 (ERR-2,2.,4.) Detector efficiency 2-4% 3273300100056 (ERR-3) Standard cross sections uncertainties 1.5% 3273300100057 (ERR-4) Weight of samples 0.1% 3273300100058 (ERR-5) Self-absorption of gamma-ray 1% 3273300100059 (ERR-6,0.1,1.) The cooling and measuring times 0.1-1% 3273300100060 (ERR-7) The branching ratio of the characteristic 3273300100061 gamma-rays, the half-life of the radioactive product 3273300100062 nuclei, and so on 2% 3273300100063 STATUS (TABLE) Data were obtained from TABLE 3 of 3273300100064 J.Radioanal.Nucl.Chem.,308,649,2016 3273300100065 HISTORY (20170818C)Compiled by Xi Tao (CNDC) 3273300100066 ENDBIB 64 0 3273300100067 COMMON 4 3 3273300100068 ERR-3 ERR-4 ERR-5 ERR-7 3273300100069 PER-CENT PER-CENT PER-CENT PER-CENT 3273300100070 1.5 0.1 1. 2. 3273300100071 ENDCOMMON 3 0 3273300100072 ENDSUBENT 71 0 3273300199999 SUBENT 32733002 20170818 31803273300200001 BIB 3 3 3273300200002 REACTION (66-DY-156(N,2N)66-DY-155,,SIG) 3273300200003 DECAY-DATA (66-DY-155,9.9HR,DG,226.9,0.707) 3273300200004 SAMPLE (66-DY-156,NAT=0.00056) 3273300200005 ENDBIB 3 0 3273300200006 NOCOMMON 0 0 3273300200007 DATA 6 2 3273300200008 EN EN-ERR DATA ERR-T MONIT MONIT-ERR 3273300200009 MEV MEV MB MB MB MB 3273300200010 13.5 0.2 1443. 101. 457.9 6.83273300200011 14.8 0.2 1573. 95. 459.7 5.03273300200012 ENDDATA 4 0 3273300200013 ENDSUBENT 12 0 3273300299999 SUBENT 32733003 20170818 31803273300300001 BIB 3 3 3273300300002 REACTION (66-DY-158(N,2N)66-DY-157,,SIG) 3273300300003 DECAY-DATA (66-DY-157,8.14HR,DG,326.3,0.94) 3273300300004 SAMPLE (66-DY-158,NAT=0.00095) 3273300300005 ENDBIB 3 0 3273300300006 NOCOMMON 0 0 3273300300007 DATA 6 2 3273300300008 EN EN-ERR DATA ERR-T MONIT MONIT-ERR 3273300300009 MEV MEV MB MB MB MB 3273300300010 13.5 0.2 1872. 131. 457.9 6.83273300300011 14.8 0.2 1856. 111. 459.7 5.03273300300012 ENDDATA 4 0 3273300300013 ENDSUBENT 12 0 3273300399999 ENDENTRY 3 0 3273399999999