ENTRY 32769 20180712 31863276900000001 SUBENT 32769001 20180712 31863276900100001 BIB 16 59 3276900100002 TITLE Activation cross section and isomeric cross section 3276900100003 ratio for the (n,2n) reaction on 132,134Ba 3276900100004 AUTHOR (Junhua Luo,Chunlei Wu,Li Jiang,Suyuan Li) 3276900100005 INSTITUTE (3CPRHXU,3CPRNPC) 3276900100006 REFERENCE (J,RCA,105,779,2017) 3276900100007 #doi:10.1515/ract-2017-2768 3276900100008 FACILITY (NGEN,3CPRNPC) Pd-300 neutron generator 3276900100009 SAMPLE Approximately 15 g of high purity BaCO3 powder (99.99% 3276900100010 pure) was pressed at 980 MPa, and a pellet around 0.4 3276900100011 cm thick and 2.0 cm in diameter was obtained. Three 3276900100012 such pellets were prepared. 3276900100013 Monitor foils (Nb, 99.99% pure, 0.5 mm thick) of the 3276900100014 same diameter as the pellets were then attached in 3276900100015 front and at the back of each sample. 3276900100016 INC-SOURCE (D-T) Neutrons were produced with an effective 3276900100017 deuteron beam energy and current of 135 keV and 260 3276900100018 uA. The T-Ti target has a thickness of 2.4 mg/cm2 and 3276900100019 the diameter of the active zone is 1.2 cm. 3276900100020 DETECTOR (HPGE) The crystal geometry is 70.1 x 72.3 mm in 3276900100021 diameter and length. The relative efficiency is about 3276900100022 68%, and energy resolution is 1.69 keV at 1332 keV 3276900100023 gamma ray from Co-60. The efficiency of the detector 3276900100024 was pre-calibrated using various standard gamma 3276900100025 sources, which were Co-57, Co-60, Cd-109, Ba-133, 3276900100026 Cs-137, Eu-152, Am-241 and Ra-226. 3276900100027 (SIBAR) The Au-Si surface barrier detector used in 3276900100028 the 135-deg accompanying alpha-particle tube was 110 3276900100029 cm from the target. 3276900100030 METHOD (ACTIV) Irradiation of the samples was lasted about 3276900100031 117 min with a yield around 3 to 4E10 n/(4pi*s). The 3276900100032 groups of sample were placed at 0, 90 or 135 degree 3276900100033 relative to the beam direction and centered about the 3276900100034 T-Ti target at distances of around 40 mm. 3276900100035 During irradiation, the neutron flux was monitored by 3276900100036 accompanying alpha particles so that corrections 3276900100037 could be made for small variations in the yield. 3276900100038 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3276900100039 DECAY-MON (41-NB-92-M,10.15D,DG,934.4,0.9915) 3276900100040 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,,1990) 3276900100041 CORRECTION The self-absorption of the sample at a given gamma 3276900100042 energy, in the counting geometry, and the coincidence 3276900100043 sum effect of cascade gamma rays in the investigated 3276900100044 nuclide were corrected. 3276900100045 ERR-ANALYS (ERR-T) Total uncertainty 3276900100046 (ERR-S,0.1,6.5) Counting statistics 0.1-6.5% 3276900100047 (ERR-1,2.0,3.0) Detector efficiency 2-3.0% 3276900100048 (ERR-2) Weight of samples 0.1% 3276900100049 (ERR-3) Self-absorption of gamma-ray 1% 3276900100050 (ERR-4,0.1,1.0) Cooling and measuring times 0.1-1% 3276900100051 (ERR-5,0.2,1.4) Uncertainties in branching ratio of 3276900100052 the characteristic gamma rays 0.2-1.4% 3276900100053 (ERR-6,0.1,1.4) Uncertainties in the half-lives of 3276900100054 the radioactive product nuclei 0.1-1.4% 3276900100055 (ERR-7,0.8,1.0) Abundance of the target isotope 0.8- 3276900100056 1.0% 3276900100057 (MONIT-ERR) Standard cross sections uncertainties 1.5% 3276900100058 STATUS (TABLE) Data were obtained from TABLE 4 of 3276900100059 J,Radiochim.Acta,105,779,2017 3276900100060 HISTORY (20180712C) Compiled by Haijing Jin (CNDC) 3276900100061 ENDBIB 59 0 3276900100062 COMMON 3 3 3276900100063 EN-ERR ERR-2 ERR-3 3276900100064 MEV PER-CENT PER-CENT 3276900100065 0.2 0.1 1. 3276900100066 ENDCOMMON 3 0 3276900100067 ENDSUBENT 66 0 3276900199999 SUBENT 32769002 20180712 31863276900200001 BIB 4 9 3276900200002 REACTION 1(56-BA-132(N,2N)56-BA-131-M,,SIG) 3276900200003 2(56-BA-132(N,2N)56-BA-131-G,M-,SIG) 3276900200004 3(56-BA-132(N,2N)56-BA-131,,SIG) 3276900200005 4(56-BA-132(N,2N)56-BA-131-M/G,,SIG/RAT) 3276900200006 DECAY-DATA1(56-BA-131-M,14.6MIN,DG,108.4,0.5489) 3276900200007 2(56-BA-131-G,11.50D,DG,496.3,0.480) 3276900200008 CORRECTION2Contribution of the metastable state decay were 3276900200009 subtracted. 3276900200010 SAMPLE (56-BA-132,NAT=0.00101) 3276900200011 ENDBIB 9 0 3276900200012 NOCOMMON 0 0 3276900200013 DATA 12 3 3276900200014 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23276900200015 DATA 3ERR-T 3DATA 4ERR-T 4MONIT MONIT-ERR 3276900200016 MEV MEV MB MB MB MB 3276900200017 MB MB NO-DIM NO-DIM MB MB 3276900200018 13.5 0.2 680. 64. 477. 43.3276900200019 1157. 107. 1.43 0.19 457.9 6.83276900200020 14.1 0.2 767. 61. 527. 45.3276900200021 1294. 106. 1.46 0.17 459.8 6.83276900200022 14.8 0.2 829. 58. 546. 44.3276900200023 1375. 102. 1.52 0.16 459.7 5.03276900200024 ENDDATA 10 0 3276900200025 ENDSUBENT 24 0 3276900299999 SUBENT 32769003 20180712 31863276900300001 BIB 4 9 3276900300002 REACTION 1(56-BA-134(N,2N)56-BA-133-M,,SIG) 3276900300003 2(56-BA-134(N,2N)56-BA-133-G,M-,SIG) 3276900300004 3(56-BA-134(N,2N)56-BA-133,,SIG) 3276900300005 4(56-BA-134(N,2N)56-BA-133-M/G,,SIG/RAT) 3276900300006 DECAY-DATA1(56-BA-133-M,38.93HR,DG,275.9,0.1769) 3276900300007 2(56-BA-133-G,10.551YR,DG,356.0,0.6205) 3276900300008 CORRECTION2Contribution of the metastable state decay were 3276900300009 subtracted. 3276900300010 SAMPLE (56-BA-134,NAT=0.02417) 3276900300011 ENDBIB 9 0 3276900300012 NOCOMMON 0 0 3276900300013 DATA 12 3 3276900300014 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23276900300015 DATA 3ERR-T 3DATA 4ERR-T 4MONIT MONIT-ERR 3276900300016 MEV MEV MB MB MB MB 3276900300017 MB MB NO-DIM NO-DIM MB MB 3276900300018 13.5 0.2 656. 33. 701. 56.3276900300019 1357. 89. 0.94 0.09 457.9 6.83276900300020 14.1 0.2 698. 35. 729. 59.3276900300021 1427. 94. 0.96 0.09 459.8 6.83276900300022 14.8 0.2 743. 35. 750. 60.3276900300023 1493. 95. 0.99 0.09 459.7 5.03276900300024 ENDDATA 10 0 3276900300025 ENDSUBENT 24 0 3276900399999 ENDENTRY 3 0 3276999999999