ENTRY 32933 20251128 3293300000001 SUBENT 32933001 20251128 20260228 3293300100001 BIB 15 54 3293300100002 TITLE Measurements of 232Th(n,2n)231Th reaction cross 3293300100003 sections in the neutron energy of 12-18.5 MeV 3293300100004 AUTHOR (Jiajun Zhu, Jun Zeng, Xiaobing Luo, Wenxuan Yan, 3293300100005 Qian Ye, Dongmei Luo) 3293300100006 INSTITUTE (3CPRSIU,3CPRNPC) 3293300100007 REFERENCE (J,JRN,333,2461,2024) 3293300100008 #doi:10.1007/s10967-024-09463-0 3293300100009 FACILITY (VDGT,3CPRSIU) 3 MV tandem accelerator 3293300100010 INC-SOURCE (D-T) A deuterium beam energy of 2 MeV and a beam 3293300100011 current of 20 uA to bombard a tritium target, 3293300100012 generating monoenergetic neutrons. 3293300100013 SAMPLE ThO2 powder with a purity of 99.9% was pressed into 3293300100014 three disks with a diameter of 20 mm and density of 3293300100015 0.1998 g/cm2. The weight of thorium were 0.627, 0.630,3293300100016 0.635 g, respectively. 3293300100017 DETECTOR (HPGE) An ORTEC high-purity germanium detector with 3293300100018 about 50% relative efficiency was used to measure the 3293300100019 gamma radioactivity of the activated samples. The 3293300100020 energy resolution of this detector for 1332 keV gamma 3293300100021 rays is 1.8 keV. For energy calibration and 3293300100022 efficiency calibration, standard sources such as 60Co,3293300100023 152Eu, 133Ba, 166mHo, 137Cs, and 241Am were used. 3293300100024 (LONGC) A BF3 long neutron counter, to monitor 3293300100025 changes in neutron flux online during irradiation. 3293300100026 METHOD (ACTIV) The three samples were irradiated for 4.219 h. 3293300100027 MONITOR (79-AU-197(N,2N)79-AU-196,,SIG) 3293300100028 DECAY-MON (79-AU-196-G,6.1669D,DG,355.73,0.87) 3293300100029 6.1669+-0.006 d, 355.73+-0.05 keV 3293300100030 MONIT-REF (,,3,IRDFF-II,,2020) 3293300100031 CORRECTION The overall correction (F) include gamma-ray self- 3293300100032 absorption correction (Fg), neutron flux fluctuation 3293300100033 correction (Fk), neutron scattering correction (Fs) 3293300100034 and neutron self-shielding effect correction (Fa) 3293300100035 at neutron energies of 12.49+-0.33 MeV, 3293300100036 16.38+-0.60 MeV, and 18.10+-0.23 MeV 3293300100037 +----------------------------------------------------+3293300100038 F Fg Fk Fs Fa 3293300100039 +----------------------------------------------------+3293300100040 1.2526 1.2376 0.9999 1.0004 1.0118 3293300100041 1.1553 1.2405 0.9999 0.9193 1.0132 3293300100042 1.2353 1.2381 0.9999 0.9924 1.0055 3293300100043 +----------------------------------------------------+3293300100044 ERR-ANALYS (ERR-T) Total uncertainty 3293300100045 (ERR-1) The net peak count of characteristic gamma 3293300100046 rays of 231Th 3293300100047 (ERR-2) The net peak count of characteristic gamma 3293300100048 rays of 196Au 3293300100049 (ERR-3) The half-life of 231Th 3293300100050 (ERR-4) The half-life of 196Au 3293300100051 (ERR-5) Gamma-ray intensity of 231Th 3293300100052 (ERR-6) Gamma-ray intensity of 196Au 3293300100053 (ERR-7) Gamma-ray detection efficiency of 231Th 3293300100054 (ERR-8) Gamma-ray detection efficiency of 196Au 3293300100055 HISTORY (20251128C) Jimin Wang 3293300100056 ENDBIB 54 0 3293300100057 COMMON 5 3 3293300100058 ERR-4 ERR-5 ERR-6 ERR-7 ERR-8 3293300100059 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3293300100060 0.005 1.500 1.035 7.165 2.002 3293300100061 ENDCOMMON 3 0 3293300100062 ENDSUBENT 61 0 3293300199999 SUBENT 32933002 20251128 20260228 3293300200001 BIB 3 4 3293300200002 REACTION (90-TH-232(N,2N)90-TH-231,,SIG) 3293300200003 DECAY-DATA (90-TH-231,25.57HR,DG,84.214,0.068) 3293300200004 25.57+-0.08 h, 84.214+-0.022 keV, 6.8+-0.10% 3293300200005 STATUS (TABLE,,Jiajun Zhu+,J,JRN,333,2461,2024) Table 9 3293300200006 ENDBIB 4 0 3293300200007 NOCOMMON 0 0 3293300200008 DATA 9 3 3293300200009 EN EN-RSL-HW DATA ERR-T ERR-1 ERR-2 3293300200010 ERR-3 MONIT MONIT-ERR 3293300200011 MEV MEV MB MB PER-CENT PER-CENT 3293300200012 PER-CENT MB PER-CENT 3293300200013 12.49 0.33 2247.27 185.53 2.206 0.5013293300200014 0.279 1844.56 2.300 3293300200015 16.38 0.60 839.62 73.99 3.841 0.5753293300200016 0.241 2126.96 2.200 3293300200017 18.10 0.23 499.28 44.69 4.137 0.5093293300200018 0.261 1665.38 2.000 3293300200019 ENDDATA 10 0 3293300200020 ENDSUBENT 19 0 3293300299999 ENDENTRY 2 0 3293399999999