ENTRY 32717 20140527 31653271700000001 SUBENT 32717001 20140527 31653271700100001 BIB 16 62 3271700100002 TITLE Ground-state and isomeric-state cross sections for the 3271700100003 165Ho(n,2n)164Ho reaction from reaction threshold to 3271700100004 20 MeV 3271700100005 AUTHOR (Junhua Luo,Li Jiang) 3271700100006 INSTITUTE (3CPRHXU) School of Physics and Electromechanical 3271700100007 Engineering, Hexi University, Zhangye, China 3271700100008 (3CPRBJG,3CPRNPC) 3271700100009 REFERENCE (J,PR/C,89,014604,2014) 3271700100010 #doi:10.1103/PhysRevC.89.014604 3271700100011 FACILITY (NGEN,3CPRNPC) K-400 neutron generator 3271700100012 SAMPLE About 6 gram of high purity Ho2O3 powder(natural 3271700100013 isotopic composition) was pressed at 10 ton/cm2, and 3271700100014 a pellet, around 0.2 cm thick and 2.0 cm in diameter 3271700100015 was obtained. Monitor foils (Nb, 99.99% pure, 0.5 mm 3271700100016 thick) of the same diameter as the pellets were then 3271700100017 attached in front and at the back of each sample. 3271700100018 DETECTOR (HPGE) The crystal geometry is 70.1 x 72.3 mm in 3271700100019 diameter and length. The relative efficiency is about 3271700100020 68%, and energy resolution is 1.69 keV at 1332 keV 3271700100021 gamma ray from Co-60. The efficiency of the detector 3271700100022 was pre-calibrated using various standard gamma 3271700100023 sources, which were Co-57, Co-60, Cd-109, Ba-133, 3271700100024 Cs-137, Eu-152, Am-241 and Ra-226. 3271700100025 (SIBAR) During irradiation, the neutron flux was 3271700100026 monitored by a Au-Si surface barrier detector. 3271700100027 METHOD (ACTIV) Irradiation of the samples was lasted about 3271700100028 60 min with a yield around 3E10 to 4E10 n/s. The 3271700100029 groups of samples were placed at 0deg. or 135deg. 3271700100030 angles relative to the beam direction and centered 3271700100031 about the T-Mo target at distances of around 4 cm. 3271700100032 The Au-Si surface barrier detector used in 135 degree 3271700100033 that accompanied the alpha-particle tube was at a 3271700100034 distance of 110 cm from the target as neutron flux 3271700100035 monitor. 3271700100036 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3271700100037 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3271700100038 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,1990) 3271700100039 INC-SOURCE (D-T) An effective deuteron beam energy of 136 keV 3271700100040 and beam current of 280 uA were used to produce 3271700100041 neutrons. And the tritium-Molybdenum (T-Mo) target 3271700100042 used in the generator was 0.566 mg/cm2 thick. 3271700100043 ERR-ANALYS (ERR-T) Total uncertainty 3271700100044 (ERR-S,0.5,18.) Counting statistics (0.5-18%) 3271700100045 (ERR-1,2.,4.) Detector efficiency (2-4%) 3271700100046 (ERR-2) Weight of samples (0.1%) 3271700100047 (ERR-3) Self-absorption of gamma-ray (1.0%) 3271700100048 (ERR-4) Uncertainties of the branching ratio of the 3271700100049 characteristic gamma rays, uncertainties of the half- 3271700100050 life of the radioactive product nuclei (2%) 3271700100051 (ERR-5,0.1,1.0) The uncertainties of the cooling and 3271700100052 measuring times (0.1-1.0%) 3271700100053 (MONIT-ERR) Standard cross sections (1.5%) 3271700100054 CORRECTION Measurements were corrected for gamma-ray 3271700100055 attenuations and fluctuation of neutron flux. The 3271700100056 data for Ho-165(n,2n)Ho-164m reaction cross sections 3271700100057 are corrected for the contribution from Ho-165(n,p)Dy- 3271700100058 165 which 94.7 keV gamma line contributes to the 3271700100059 94.0 keV gamma line. 3271700100060 STATUS (TABLE) All measured reactions data are taken from 3271700100061 Table 3 at page 014604-4 in J,PR/C,89,014604,2014. 3271700100062 Monitor data are provided by author. 3271700100063 HISTORY (20140527C) Compiled by CHEN Guochang (CNDC) 3271700100064 ENDBIB 62 0 3271700100065 COMMON 4 3 3271700100066 ERR-2 ERR-3 ERR-4 MONIT-ERR 3271700100067 PER-CENT PER-CENT PER-CENT PER-CENT 3271700100068 0.1 1.0 2. 1.5 3271700100069 ENDCOMMON 3 0 3271700100070 ENDSUBENT 69 0 3271700199999 SUBENT 32717002 20140527 31653271700200001 BIB 2 6 3271700200002 REACTION 1(67-HO-165(N,2N)67-HO-164-M,,SIG) 3271700200003 2(67-HO-165(N,2N)67-HO-164-G,,SIG) 3271700200004 3(67-HO-165(N,2N)67-HO-164,,SIG) 3271700200005 4(67-HO-165(N,2N)67-HO-164-M/G,,SIG/RAT) 3271700200006 DECAY-DATA1(67-HO-164-M,37.5MIN,DG,94.00,0.00139) 3271700200007 2(67-HO-164-G,29.MIN,DG,91.39,0.023) 3271700200008 ENDBIB 6 0 3271700200009 NOCOMMON 0 0 3271700200010 DATA 12 2 3271700200011 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23271700200012 DATA 3ERR-T 3DATA 4ERR-T 4MONIT MONIT-ERR 3271700200013 MEV MEV MB MB MB MB 3271700200014 MB MB NO-DIM NO-DIM MB MB 3271700200015 13.5 0.2 774. 163. 442. 120.3271700200016 1217. 283. 1.8 0.6 457.9 6.83271700200017 14.8 0.2 838. 151. 456. 108.3271700200018 1294. 259. 1.8 0.6 459.7 5.03271700200019 ENDDATA 8 0 3271700200020 ENDSUBENT 19 0 3271700299999 ENDENTRY 2 0 3271799999999