ENTRY 32752 20171009 31813275200000001 SUBENT 32752001 20171009 31813275200100001 BIB 16 61 3275200100002 TITLE Neutron-induced activation cross-sections on natural 3275200100003 cerium up to 20 MeV 3275200100004 AUTHOR (Junhua Luo, Li An, Li Jiang) 3275200100005 INSTITUTE (3CPRHXU,3CPRNPC) 3275200100006 REFERENCE (J,JRN,305,691,2015) 3275200100007 #doi:10.1007/s10967-015-4049-x 3275200100008 FACILITY (NGEN,3CPRNPC) PD-300 neutron generator 3275200100009 SAMPLE Three pellets, about 0.2 cm thick and 20 mm in 3275200100010 diameter were formed by pressing approximately 10 3275200100011 gram of CeO2 (99.99% pure) powder (natural isotopic 3275200100012 composition) at 980 Mpa. Each of them was sandwiched 3275200100013 between two standard Nb (99.99% pure, 0.5 mm thick) 3275200100014 and Al (99.999% pure, 0.3 mm thick) foils of the same 3275200100015 diameter used to monitor the neutron fluence via the 3275200100016 93Nb(n,2n)92mNb or 27Al(n,a)24Na reactions. 3275200100017 INC-SOURCE (D-T) A 2.40 mg/cm2 thick tritium-titanium target, an 3275200100018 effective deuteron beam energy of 125 keV and beam 3275200100019 current of 200 uA. 3275200100020 DETECTOR (HPGE) A high-purity germanium detector (ORTEC, model 3275200100021 GEM 60P, crystal diameter: 70.1 mm, crystal length: 3275200100022 72.3 mm) with a relative efficiency of about 68% and 3275200100023 an energy resolution of 1.69 keV at 1.332 keV for 3275200100024 60Co. The efficiency of the detector was 3275200100025 pre-calibrated using various standard gamma sources 3275200100026 54Mn, 57Co, 60Co, 109Cd, 133Ba, 137Cs, 152Eu, 241Am 3275200100027 and 225Ra. 3275200100028 (FISCH) The neutron flux was monitored by a uranium 3275200100029 fission chamber allowing corrections to be made for 3275200100030 small variations in the yield. 3275200100031 METHOD (ACTIV) Irradiation of the samples was lasted 3275200100032 approximately 2 hours with a yield about 3 to 4E10 3275200100033 n/(4pi*s). The groups of samples were placed at 0, 3275200100034 90, and 135 degree relative to the beam direction and 3275200100035 centered at a distance of about 5 cm from T-Ti target. 3275200100036 MONITOR 1(41-NB-93(N,2N)41-NB-92-M,,SIG) 3275200100037 2(13-AL-27(N,A)11-NA-24,,SIG) 3275200100038 DECAY-MON 1(41-NB-92-M,10.15D,DG,934.43,0.9907) 3275200100039 2(11-NA-24,14.959HR,DG,1368.6,1.00) 3275200100040 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,1990) The cross section of 3275200100041 monitor reaction was obtained by interpolating the 3275200100042 evaluated values of the literature. 3275200100043 CORRECTION Corrections were made for the self-absorption of the 3275200100044 sample at a given gamma-energy, the coincidence sum 3275200100045 effect of cascade gamma-rays in the investigated 3275200100046 nuclide and in the counting geometry. 3275200100047 ERR-ANALYS (ERR-T) Total uncertainty 3275200100048 (ERR-1,0.5,25.0) Counting statistics 0.5-25.0% 3275200100049 (ERR-2,0.5,1.5) Standard cross sections 0.5-1.5% 3275200100050 (ERR-3,0.2,5.3) Isotopic abundance 0.2-5.3% 3275200100051 (ERR-4,2.0,3.0) Detector efficiency 2.0-3.0% 3275200100052 (ERR-5) Weight of samples 0.1% 3275200100053 (ERR-6) Self-absorption of gamma-ray about 0.5% 3275200100054 (ERR-7,0.1,4.3) Relative gamma-ray intensity 0.1-4.3% 3275200100055 (ERR-8,0.02,1.8) Half-life 0.02-1.8% 3275200100056 (ERR-9,0.0,5.0) Coincidence sum effect of cascade 3275200100057 gamma-rays 0-5.0% 3275200100058 (ERR-10,0.1,1.0) Uncertainties of irradiation, 3275200100059 cooling and measuring times 0.1-1.0% 3275200100060 STATUS (TABLE) Data were obtained from TABLE 4 of 3275200100061 J.Radioanal.Nucl.Chem.,305,691,2015 3275200100062 HISTORY (20171009C) Compiled by Xi Tao (CNDC) 3275200100063 ENDBIB 61 0 3275200100064 COMMON 2 3 3275200100065 ERR-5 ERR-6 3275200100066 PER-CENT PER-CENT 3275200100067 0.1 0.5 3275200100068 ENDCOMMON 3 0 3275200100069 ENDSUBENT 68 0 3275200199999 SUBENT 32752002 20171009 31813275200200001 BIB 3 3 3275200200002 REACTION (58-CE-136(N,2N)58-CE-135,,SIG) 3275200200003 DECAY-DATA (58-CE-135-G,17.7HR,DG,265.56,0.418) 3275200200004 SAMPLE (58-CE-136,NAT=0.0019) 3275200200005 ENDBIB 3 0 3275200200006 NOCOMMON 0 0 3275200200007 DATA 8 3 3275200200008 EN EN-ERR DATA ERR-T MONIT1 MONIT1-ERR 3275200200009 MONIT2 MONIT2-ERR 3275200200010 MEV MEV MB MB MB MB 3275200200011 MB MB 3275200200012 13.5 0.2 1253. 76. 457.9 6.83275200200013 125.7 0.8 3275200200014 14.1 0.2 1358. 81. 459.8 6.83275200200015 121.6 0.6 3275200200016 14.8 0.2 1456. 73. 459.7 5.03275200200017 111.9 0.5 3275200200018 ENDDATA 10 0 3275200200019 ENDSUBENT 18 0 3275200299999 SUBENT 32752003 20171009 31813275200300001 BIB 4 9 3275200300002 REACTION 1(58-CE-140(N,2N)58-CE-139-M,,SIG) 3275200300003 2(58-CE-140(N,2N)58-CE-139-G,,SIG) 3275200300004 3(58-CE-140(N,2N)58-CE-139,,SIG) 3275200300005 4(58-CE-140(N,2N)58-CE-139-M/G,,SIG/RAT) 3275200300006 DECAY-DATA1(58-CE-139-M,54.8SEC,DG,754.24,0.9245) 3275200300007 2(58-CE-139-G,137.640D,DG,165.85,0.7990) 3275200300008 SAMPLE (58-CE-140,NAT=0.8848) 3275200300009 CORRECTION2Contribution of 139mCe production to the 165.85 keV 3275200300010 subtracted. 3275200300011 ENDBIB 9 0 3275200300012 NOCOMMON 0 0 3275200300013 DATA 14 2 3275200300014 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23275200300015 DATA 3ERR-T 3DATA 4ERR-T 4MONIT1 MONIT1-ERR 3275200300016 MONIT2 MONIT2-ERR 3275200300017 MEV MEV MB MB MB MB 3275200300018 MB MB NO-DIM NO-DIM MB MB 3275200300019 MB MB 3275200300020 13.5 0.2 794. 44. 879. 74.3275200300021 1677. 118. 0.9 0.1 457.9 6.83275200300022 125.7 0.8 3275200300023 14.8 0.2 1080. 70. 775. 99.3275200300024 1855. 169. 1.4 0.2 459.7 5.03275200300025 111.9 0.5 3275200300026 ENDDATA 12 0 3275200300027 ENDSUBENT 26 0 3275200399999 SUBENT 32752004 20171009 31813275200400001 BIB 3 3 3275200400002 REACTION (58-CE-142(N,2N)58-CE-141,,SIG) 3275200400003 DECAY-DATA (58-CE-141,32.501D,DG,145.44,0.482) 3275200400004 SAMPLE (58-CE-142,NAT=0.1108) 3275200400005 ENDBIB 3 0 3275200400006 NOCOMMON 0 0 3275200400007 DATA 8 3 3275200400008 EN EN-ERR DATA ERR-T MONIT1 MONIT1-ERR 3275200400009 MONIT2 MONIT2-ERR 3275200400010 MEV MEV MB MB MB MB 3275200400011 MB MB 3275200400012 13.5 0.2 1768. 88. 457.9 6.83275200400013 125.7 0.8 3275200400014 14.1 0.2 1804. 90. 459.8 6.83275200400015 121.6 0.6 3275200400016 14.8 0.2 1598. 70. 459.7 5.03275200400017 111.9 0.5 3275200400018 ENDDATA 10 0 3275200400019 ENDSUBENT 18 0 3275200499999 SUBENT 32752005 20171009 31813275200500001 BIB 3 3 3275200500002 REACTION (58-CE-140(N,P)57-LA-140,,SIG) 3275200500003 DECAY-DATA (57-LA-140,1.6781D,DG,487.02,0.455) 3275200500004 SAMPLE (58-CE-140,NAT=0.8848) 3275200500005 ENDBIB 3 0 3275200500006 NOCOMMON 0 0 3275200500007 DATA 8 3 3275200500008 EN EN-ERR DATA ERR-T MONIT1 MONIT1-ERR 3275200500009 MONIT2 MONIT2-ERR 3275200500010 MEV MEV MB MB MB MB 3275200500011 MB MB 3275200500012 13.5 0.2 5.8 0.5 457.9 6.83275200500013 125.7 0.8 3275200500014 14.1 0.2 7.0 0.6 459.8 6.83275200500015 121.6 0.6 3275200500016 14.8 0.2 8.6 0.8 459.7 5.03275200500017 111.9 0.5 3275200500018 ENDDATA 10 0 3275200500019 ENDSUBENT 18 0 3275200599999 SUBENT 32752006 20171009 31813275200600001 BIB 3 3 3275200600002 REACTION (58-CE-142(N,P)57-LA-142,,SIG) 3275200600003 DECAY-DATA (57-LA-142,91.1MIN,DG,641.285,0.47) 3275200600004 SAMPLE (58-CE-142,NAT=0.1108) 3275200600005 ENDBIB 3 0 3275200600006 NOCOMMON 0 0 3275200600007 DATA 8 3 3275200600008 EN EN-ERR DATA ERR-T MONIT1 MONIT1-ERR 3275200600009 MONIT2 MONIT2-ERR 3275200600010 MEV MEV MB MB MB MB 3275200600011 MB MB 3275200600012 13.5 0.2 2.2 0.5 457.9 6.83275200600013 125.7 0.8 3275200600014 14.1 0.2 3.1 0.6 459.8 6.83275200600015 121.6 0.6 3275200600016 14.8 0.2 4.4 0.8 459.7 5.03275200600017 111.9 0.5 3275200600018 ENDDATA 10 0 3275200600019 ENDSUBENT 18 0 3275200699999 SUBENT 32752007 20171009 31813275200700001 BIB 3 3 3275200700002 REACTION (58-CE-140(N,A)56-BA-137-M,,SIG) 3275200700003 DECAY-DATA (56-BA-137-M,2.552MIN,DG,661.66,0.9011) 3275200700004 SAMPLE (58-CE-140,NAT=0.8848) 3275200700005 ENDBIB 3 0 3275200700006 NOCOMMON 0 0 3275200700007 DATA 8 2 3275200700008 EN EN-ERR DATA ERR-T MONIT1 MONIT1-ERR 3275200700009 MONIT2 MONIT2-ERR 3275200700010 MEV MEV MB MB MB MB 3275200700011 MB MB 3275200700012 13.5 0.2 1.5 0.6 457.9 6.83275200700013 125.7 0.8 3275200700014 14.8 0.2 1.7 0.8 459.7 5.03275200700015 111.9 0.5 3275200700016 ENDDATA 8 0 3275200700017 ENDSUBENT 16 0 3275200799999 ENDENTRY 7 0 3275299999999