ENTRY 32713 20180419 31843271300000001 SUBENT 32713001 20180419 31843271300100001 BIB 15 51 3271300100002 TITLE Activation measurements of fast neutron radiative 3271300100003 capture for 139La 3271300100004 AUTHOR (Luo Junhua, Han Jiuning, Liu Rong, Jiang Li, 3271300100005 Liu Zhenlai, Sun Guihua, Ge Suhong) 3271300100006 INSTITUTE (3CPRHXU,3CPRBJG,3CPRNPC) 3271300100007 REFERENCE (J,RPC,86,79,2013) 3271300100008 FACILITY (NGEN,3CPRNPC) PD-300 neutron generator 3271300100009 SAMPLE About 10 gram of La2O3 powder of natural isotopic 3271300100010 composition was pressed at 10 t/cm2 and a pellet 3271300100011 0.3 cm thick and 2.0 cm in diameter. 3271300100012 The samples were placed at 0, 90 or 135 degree 3271300100013 relative to the beam direction and centered about the 3271300100014 T-Ti target at distances of around 3-5 cm. 3271300100015 INC-SOURCE (D-T) An effective deuteron beam energy and beam 3271300100016 current is 125 keV and 200 uA. T-Ti target was 3271300100017 2.40 mg/cm2 thick. 3271300100018 DETECTOR (HPGE) The crystal geometry is 70.1 x 72.3 mm in 3271300100019 diameter and length. The relative efficiency is about 3271300100020 68%, and energy resolution is 1.69 keV at 1332 keV 3271300100021 gamma ray from Co-60. 3271300100022 The efficiency of the detector was pre-calibrated 3271300100023 using various standard gamma sources, which were 3271300100024 Mn-54, Co-57, Co-60, Cd-109, Ba-133, Cs-137, Eu-152, 3271300100025 Am-241 and Ra-226. 3271300100026 (FISCH) The neutron flux was monitored by a uranium 3271300100027 fission chamber. 3271300100028 METHOD (ACTIV) The irradiation was lasted 121 min with a 3271300100029 yield around 3 to 4E10 n/s. The average neutron 3271300100030 fluence rate in the place of the samples is around 3271300100031 0.95-3.54E8 n/(cm s). 3271300100032 MONITOR (13-AL-27(N,A)11-NA-24,,SIG) 3271300100033 DECAY-MON (11-NA-24,14.959HR,DG,1368.6,1.00) 3271300100034 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,,1990) 3271300100035 ERR-ANALYS (ERR-T) Uncertainties of the branching ratio of the 3271300100036 characteristic gamma rays, uncertainties of the half 3271300100037 life of the radioactive product nuclei and so on, 3271300100038 have also been considered. 3271300100039 (ERR-S,0.95,1.8) Counting statistics 0.95-1.8% 3271300100040 (ERR-1,0.1,1.) Uncertainties of irradiation, cooling 3271300100041 and measuring times 0.1-1% 3271300100042 (ERR-2,10.,15.) Low energy neutrons 10-15% 3271300100043 (ERR-3) Isotopic abundance 0.1% 3271300100044 (ERR-4) Detector efficiency 3.0% 3271300100045 (ERR-5,0.,5.) Coincidence sum effect of cascade 3271300100046 gamma-ray 0- 5% 3271300100047 (ERR-6) Weight of samples 0.1% 3271300100048 (ERR-7) Self-absorption of gamma-ray ~0.5% 3271300100049 (MONIT-ERR) Standard cross sections 0.5-0.7% 3271300100050 STATUS (TABLE) Table 3 of Rad.Phys.Chem.86(2013)79 3271300100051 HISTORY (20161015C) 3271300100052 (20180419U) On. IPC -> RPC 3271300100053 ENDBIB 51 0 3271300100054 COMMON 5 3 3271300100055 EN-ERR ERR-3 ERR-4 ERR-6 ERR-7 3271300100056 MEV PER-CENT PER-CENT PER-CENT PER-CENT 3271300100057 0.2 0.1 3.0 0.1 0.5 3271300100058 ENDCOMMON 3 0 3271300100059 ENDSUBENT 58 0 3271300199999 SUBENT 32713002 20161015 31763271300200001 BIB 2 8 3271300200002 REACTION 1(57-LA-139(N,G)57-LA-140,,SIG) 3271300200003 2(57-LA-139(N,G)57-LA-140,,SIG) 3271300200004 3(57-LA-139(N,G)57-LA-140,,SIG) 3271300200005 4(57-LA-139(N,G)57-LA-140,,SIG) 3271300200006 DECAY-DATA1(57-LA-140,1.67855D,DG,328.762,0.213) 3271300200007 2(57-LA-140,1.67855D,DG,487.021,0.477) 3271300200008 3(57-LA-140,1.67855D,DG,815.772,0.244) 3271300200009 4(57-LA-140,1.67855D,DG,1596.21,1.000) 3271300200010 ENDBIB 8 0 3271300200011 NOCOMMON 0 0 3271300200012 DATA 11 3 3271300200013 EN DATA 1ERR-T 1DATA 2ERR-T 2DATA 33271300200014 ERR-T 3DATA 4ERR-T 4MONIT MONIT-ERR 3271300200015 MEV MB MB MB MB MB 3271300200016 MB MB MB MB MB 3271300200017 13.5 1.10 0.17 1.26 0.16 1.593271300200018 0.19 1.30 0.15 125.7 0.8 3271300200019 14.1 1.03 0.15 1.06 0.17 1.373271300200020 0.17 1.18 0.18 121.6 0.6 3271300200021 14.8 0.92 0.12 0.98 0.18 1.093271300200022 0.17 1.00 0.12 111.9 0.5 3271300200023 ENDDATA 10 0 3271300200024 ENDSUBENT 23 0 3271300299999 SUBENT 32713003 20161015 31763271300300001 BIB 3 4 3271300300002 REACTION (57-LA-139(N,G)57-LA-140,,SIG,,AV) 3271300300003 ANALYSIS Weighted average of cross sections determined by four 3271300300004 gamma lines 3271300300005 STATUS (DEP,32713002) Cross sections for four gamma lines 3271300300006 ENDBIB 4 0 3271300300007 NOCOMMON 0 0 3271300300008 DATA 5 3 3271300300009 EN DATA ERR-T MONIT MONIT-ERR 3271300300010 MEV MB MB MB MB 3271300300011 13.5 1.30 0.08 125.7 0.8 3271300300012 14.1 1.15 0.08 121.6 0.6 3271300300013 14.8 0.99 0.07 111.9 0.5 3271300300014 ENDDATA 5 0 3271300300015 ENDSUBENT 14 0 3271300399999 ENDENTRY 3 0 3271399999999