ENTRY 32803 20200801 31973280300000001 SUBENT 32803001 20200801 31973280300100001 BIB 16 65 3280300100002 TITLE Activation cross-section and isomeric cross-section 3280300100003 ratio for the 122Te(n,2n)121m,gTe process 3280300100004 AUTHOR (Junhua Luo, Li Jiang, Le Shan, Liang Zhou) 3280300100005 INSTITUTE (3CPRHXU,3CPRNPC) 3280300100006 REFERENCE (J,JRN,324,913,2020) 3280300100007 #doi:10.1007/s10967-020-07119-3 3280300100008 FACILITY (NGEN,3CPRNPC) K-400 Neutron Generator 3280300100009 INC-SOURCE (D-T) The T-Mo target used in the generator, had a 3280300100010 thickness of 0.57 mg/cm2, and an active zone diameter 3280300100011 of 12 mm. Neutrons were generated with a mean 3280300100012 deuteron beam energy of 125 keV and a beam current of 3280300100013 300 uA. Throughout the process of irradiation, the 3280300100014 neutron flux was monitored by the accompanying 3280300100015 alpha-particles, so that corrections could be 3280300100016 performed for small variations in the yield. 3280300100017 SAMPLE Three samples were made from natural Te (99.995% 3280300100018 purity) powder, and each one in the form of a pellet, 3280300100019 about 1.8 mm in thickness and 20 mm in diameter. 3280300100020 These pellets were then sandwiched between two 3280300100021 standard Nb foils (99.999% purity, 0.5 mm thick each) 3280300100022 having equal diameter. 3280300100023 METHOD (ACTIV) The entire process for irradiation of all the 3280300100024 three samples was lasted about 3 hours with a yield 3280300100025 about 3 to 4 E10 n/(4 pai s). The groups of samples 3280300100026 were positioned at 0, 90 and 135 deg relative to the 3280300100027 beam direction. Cooling time is 27 hours. 3280300100028 DETECTOR (SIBAR) An Au-Si surface barrier detector used to 3280300100029 detect accompanying alpha-particles was positioned at 3280300100030 135 deg relative to the beam direction and a distance 3280300100031 of 1.10 m from the target. 3280300100032 (HPGE) The gamma-ray activities of 121mTe, 121gTe 3280300100033 and 93mNb were measured by using a high-purity 3280300100034 germanium detector. 3280300100035 REL-REF (I,32777001,Junhua Luo+,J,EPJ/A,54,67,2018) 3280300100036 The HPGE detector has been described. 3280300100037 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3280300100038 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3280300100039 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,,1990) 3280300100040 CORRECTION F is the total correction factor of the activity, 3280300100041 F=fs*fg. fs and fg are the correction factors for the 3280300100042 self-absorption of the sample at a specifed gamma-ray 3280300100043 energy and in the counting geometry, respectively. 3280300100044 Correction factors for the self-absorption: 3280300100045 ****************************************************** 3280300100046 Samples thickness h (cm) 3280300100047 Gamma-ray energy (keV)******************************** 3280300100048 0.1938 0.1758 0.1861 3280300100049 ****************************************************** 3280300100050 212.2 1.207 1.187 1.198 3280300100051 573.1 1.051 1.047 1.049 3280300100052 ****************************************************** 3280300100053 ERR-ANALYS (ERR-T) The total uncertainty 7.4-9.5% 3280300100054 The chief uncertainty sources are as follows and 3280300100055 some additional uncertainties originated from the 3280300100056 parameters of the measured and standard nuclei, 3280300100057 such as the uncertainties in the branching ratio of 3280300100058 characteristic gamma-rays, in the half-lives of the 3280300100059 the radioactive product nuclei, and so on. 3280300100060 (ERR-S,0.1,1.3) Counting statistics 0.1-1.3% 3280300100061 (ERR-1) Detector efficiency 3.0% 3280300100062 (ERR-2) Weight of samples 0.1% 3280300100063 (ERR-3) Self-absorption of gamma-rays 1.% 3280300100064 (ERR-4) Cooling and measuring times 0.1% 3280300100065 (MONIT-ERR) Standard cross-sections 1.5% 3280300100066 HISTORY (20200801C) Jimin Wang (CNDC) 3280300100067 ENDBIB 65 0 3280300100068 COMMON 5 3 3280300100069 ERR-1 ERR-2 ERR-3 ERR-4 MONIT-ERR 3280300100070 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3280300100071 3.0 0.1 1. 0.1 1.5 3280300100072 ENDCOMMON 3 0 3280300100073 ENDSUBENT 72 0 3280300199999 SUBENT 32803002 20200801 31973280300200001 BIB 4 9 3280300200002 REACTION 1(52-TE-122(N,2N)52-TE-121-M,,SIG) 3280300200003 2(52-TE-122(N,2N)52-TE-121-G,,SIG) 3280300200004 3(52-TE-122(N,2N)52-TE-121,,SIG) 3280300200005 4(52-TE-122(N,2N)52-TE-121-M/G,,SIG/RAT) 3280300200006 DECAY-DATA1(52-TE-121-M,164.2D,DG,212.19,0.815) 3280300200007 2(52-TE-121-G,19.17D,DG,573.14,0.804) 3280300200008 SAMPLE (52-TE-122,NAT=0.0255) 3280300200009 STATUS (TABLE) TABLE 4 and text (p918) of Journal of 3280300200010 Radioanalytical and Nuclear Chemistry,324,913,2020 3280300200011 ENDBIB 9 0 3280300200012 NOCOMMON 0 0 3280300200013 DATA 10 3 3280300200014 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23280300200015 DATA 3ERR-T 3DATA 4ERR-T 4 3280300200016 MEV MEV MB MB MB MB 3280300200017 MB MB NO-DIM NO-DIM 3280300200018 13.5 0.2 509. 39. 514. 45.3280300200019 1023. 84. 0.99 0.12 3280300200020 14.1 0.2 534. 43. 527. 50.3280300200021 1061. 93. 1.01 0.13 3280300200022 14.8 0.2 593. 44. 569. 52.3280300200023 1162. 96. 1.04 0.12 3280300200024 ENDDATA 10 0 3280300200025 ENDSUBENT 24 0 3280300299999 ENDENTRY 2 0 3280399999999