ENTRY 32779 20220830 32083277900000001 SUBENT 32779001 20220830 32083277900100001 BIB 17 61 3277900100002 TITLE Activation cross section and isomeric cross-section 3277900100003 ratio for the 151Eu(n,2n)150m,gEu process 3277900100004 AUTHOR (Junhua Luo, Suyuan Li, Li Jiang) 3277900100005 INSTITUTE (3CPRHXU,3CPRNPC) 3277900100006 REFERENCE (J,RPC,148,43,2018) 3277900100007 #doi:10.1016/j.radphyschem.2018.02.023 3277900100008 REL-REF (N,32772001,Junhua Luo+,J,PR/C,96,044617,2017) 3277900100009 153Eu(n,2n)152Eu cross sections 3277900100010 FACILITY (NGEN,3CPRNPC) K-400 Neutron Generator 3277900100011 INC-SOURCE (D-T) Tritium-titanium (T-Ti) target was at distances 3277900100012 of about 40 mm. Neutrons were produced with an 3277900100013 effective deuteron beam energy of 136 keV and beam 3277900100014 current of 260 uA. 3277900100015 SAMPLE (63-EU-151,NAT=0.4781) Approximately 10 g of high 3277900100016 purity Eu2O3 powder was pressed at 980 MPa, and a 3277900100017 pellet, about 0.2 cm thick and 2.0 cm in diameter was 3277900100018 obtained. Three such pellets were prepared. Monitor 3277900100019 foils (Nb, 99.99% pure, 0.5 mm thick) of the same 3277900100020 diameter as the pellets were then attached in front 3277900100021 and at the back of each sample. 3277900100022 METHOD (ACTIV) Irradiation lasted about 120 min with a yield 3277900100023 of about 3 to 4E10 n/(4pi*s). The groups of samples 3277900100024 were placed at 0, 90 or 135 deg angle relative to the 3277900100025 beam direction. After the irradiation process, three 3277900100026 samples were cooled for 1 h-6.5 years. 3277900100027 DETECTOR (HPGE) A high-purity germanium (HPGe) detector 3277900100028 (ORTEC, model GEM 60P, crystal diameter: 70.1 mm, 3277900100029 crystal length: 72.3 mm, made in USA) with a 3277900100030 relative efficiency of about 68% and an energy 3277900100031 resolution of 1.69 keV at 1332 keV for 60Co. The 3277900100032 efficiency of the detector was pre-calibrated using 3277900100033 various standard gamma sources, which were 57Co, 60Co, 3277900100034 109Cd, 133Ba, 137Cs, 152Eu, 241Am and 226Ra. 3277900100035 (SIBAR) The Au-Si surface barrier detector used to 3277900100036 detect accompanying alpha particle was at 135 deg and 3277900100037 a distance of 110 cm from the target. 3277900100038 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3277900100039 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3277900100040 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,,1990) 3277900100041 CORRECTION F is the total correction factor of the activity: 3277900100042 F=fs*fg*fc. fs, fg, and fc are the correction factors 3277900100043 for: the self-absorption of the sample at a given 3277900100044 gamma energy; the counting geometry; the coincidence 3277900100045 sum effect of cascade gamma rays in the investigated 3277900100046 nuclide, respectively. Correction factors for the 3277900100047 self-absorption at 333.97/406.52 keV were 1.106/1.076 3277900100048 for sample 1 (0.1427 cm thick), 1.128/1.092 for 3277900100049 sample 2 (0.1718 cm thick), and 1.078/1.057 for 3277900100050 sample 3 (0.1065 cm thick). 3277900100051 ERR-ANALYS (ERR-T) Total uncertainty 3277900100052 (ERR-S,0.2,5.3) Counting statistics 0.2-5.3% 3277900100053 (ERR-1,2.,3.) Detector efficiency 2-3% 3277900100054 (ERR-2) Weight of samples 0.1% 3277900100055 (ERR-3) Self-absorption of gamma-ray 1% 3277900100056 (ERR-4,0.1,1.) The cooling and measuring times 0.1-1% 3277900100057 (MONIT-ERR) Standard cross sections uncertainties 1.5% 3277900100058 STATUS (TABLE) Table 5 and text (p6) of Radiation Physics 3277900100059 and Chemistry,148,43,2018. 3277900100060 HISTORY (20191004C) Compiled by Xi Tao (CNDC) 3277900100061 (20220830A) VT. Revision in 002 and COMMON: MONIT-ERR 3277900100062 deleted. 3277900100063 ENDBIB 61 0 3277900100064 COMMON 2 3 3277900100065 ERR-2 ERR-3 3277900100066 PER-CENT PER-CENT 3277900100067 0.1 1. 3277900100068 ENDCOMMON 3 0 3277900100069 ENDSUBENT 68 0 3277900199999 SUBENT 32779002 20220830 32083277900200001 BIB 3 10 3277900200002 REACTION 1(63-EU-151(N,2N)63-EU-150-M,,SIG) 3277900200003 2(63-EU-151(N,2N)63-EU-150-G,,SIG) 3277900200004 3(63-EU-151(N,2N)63-EU-150,,SIG) 3277900200005 4(63-EU-151(N,2N)63-EU-150-M/T,,SIG/RAT) 3277900200006 DECAY-DATA1(63-EU-150-M,12.8HR,DG,406.5,0.028, 3277900200007 DG,333.9,0.040) 3277900200008 2(63-EU-150-G,36.9YR,DG,333.97,0.9516, 3277900200009 DG,439.4,0.796, 3277900200010 DG,584.27,0.521) 3277900200011 HISTORY (20220830A) VT. REACTION4: SF4: M/G->M/T replaced. 3277900200012 ENDBIB 10 0 3277900200013 NOCOMMON 0 0 3277900200014 DATA 12 3 3277900200015 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23277900200016 DATA 3ERR-T 3DATA 4ERR-T 4MONIT MONIT-ERR 3277900200017 MEV MEV MB MB MB MB 3277900200018 MB MB NO-DIM NO-DIM MB MB 3277900200019 13.5 0.2 422. 97. 676. 44.3277900200020 1098. 141. 0.38 0.10 457.9 6.83277900200021 14.1 0.2 430. 99. 714. 44.3277900200022 1144. 143. 0.38 0.10 459.8 6.83277900200023 14.8 0.2 464. 106. 726. 44.3277900200024 1190. 150. 0.39 0.10 459.7 5.03277900200025 ENDDATA 10 0 3277900200026 ENDSUBENT 25 0 3277900299999 ENDENTRY 2 0 3277999999999