ENTRY 32683 20100914 31463268300000001 SUBENT 32683001 20100914 31463268300100001 BIB 14 37 3268300100002 TITLE Development of laboratory standards for AMS measurement3268300100003 of 237Np 3268300100004 AUTHOR (Xianggao WANG,Shan JIANG,Kejun DONG,Ming HE, 3268300100005 Guozhu HE,Chaoli LI,Shizhuo LI,Jie GONG,Liyuan LU) 3268300100006 INSTITUTE (3CPRAEP) 3268300100007 (3CPRCPR) Guangxi University, China 3268300100008 REFERENCE (J,NIM/B,268,1949,201006) 3268300100009 #doi:10.1016/j.nimb.2010.02.106 3268300100010 FACILITY (NGEN,3CPRAEP) 600 kV Neutron Generator 3268300100011 DETECTOR (HPGE,SIBAR) The diameter of the sensitive area for 3268300100012 the HPGe detector is 60 mm. The Au-Si surface 3268300100013 barrier detector used in the 155 degree accompanying 3268300100014 alpha particles tube was at a distance of 195 cm from 3268300100015 the target. 3268300100016 METHOD (ACTIV) Activation 3268300100017 INC-SOURCE (D-T) The thickness of the solid tritium-titanium(T-Ti)3268300100018 target is 1.0 mg/cm2, 3268300100019 MONITOR (27-CO-59(N,2N)27-CO-58,,SIG) 3268300100020 (41-NB-93(N,2N)41-NB-92-M,,SIG) 3268300100021 (13-AL-27(N,A)11-NA-24,,SIG) 3268300100022 MONIT-REF (,,3,CENDL-2.1,,1991) 59Co(n,2n), 93Nb(n,2n) and 3268300100023 27Al(n,a) reaction cross sections were taken from 3268300100024 CENDL-2.1. 3268300100025 DECAY-MON (27-CO-58,70.82D,DG,810.764,0.99448) 3268300100026 (41-NB-92-M,10.15D,DG,934.44,0.9907) 3268300100027 (11-NA-24,14.9590HR,DG,1368.633,1.) 3268300100028 STATUS (TABLE) Data are Taken from page 1952 of 3268300100029 J,NIM/B,268,1949-1953,201006 3268300100030 HISTORY (20100909C) Compiled by Youxiang ZHUANG 3268300100031 ERR-ANALYS (ERR-T) Total errors (2.5%) 3268300100032 (ERR-S) Counting statistics (0.3%) 3268300100033 (ERR-1) Standard cross section (1.0%) 3268300100034 (ERR-2,,0.1) Weight of sample (<0.1%) 3268300100035 (ERR-3) Self-attenuation correction factor(1.7%) 3268300100036 (ERR-4) Coincidence sum effect of cascade gamma rays 3268300100037 (1.0%) 3268300100038 (ERR-5) Branching ratio of 208.4 keV gamma rays (1.1%) 3268300100039 ENDBIB 37 0 3268300100040 COMMON 5 3 3268300100041 ERR-S ERR-1 ERR-3 ERR-4 ERR-5 3268300100042 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3268300100043 0.3 1.0 1.7 1.0 1.1 3268300100044 ENDCOMMON 3 0 3268300100045 ENDSUBENT 44 0 3268300199999 SUBENT 32683002 20100914 31463268300200001 BIB 3 6 3268300200002 REACTION (92-U-238(N,2N)92-U-237,,SIG) 3268300200003 SAMPLE (92-U-238,NAT=0.997)The sample was made of depleted 3268300200004 U3O8 powder of 99.9% purity (238U~99.7%, 235U~0.3%) 3268300200005 with a diameter of 5 mm, and sandwiched between two 3268300200006 disks each of thin Co and Nb foils. 3268300200007 DECAY-DATA (92-U-237,6.75D,DG,208.0,0.2114) 3268300200008 ENDBIB 6 0 3268300200009 NOCOMMON 0 0 3268300200010 DATA 3 1 3268300200011 EN DATA ERR-T 3268300200012 MEV MB PER-CENT 3268300200013 14.65 674.9 2.5 3268300200014 ENDDATA 3 0 3268300200015 ENDSUBENT 14 0 3268300299999 ENDENTRY 2 0 3268399999999