ENTRY 32919 20241010 3291900000001 SUBENT 32919001 20241010 20250110 3291900100001 BIB 12 45 3291900100002 TITLE Measurement of cross section for the 232Th(n,f) 3291900100003 reaction using a time projection chamber 3291900100004 AUTHOR (Haofan Bai,Han Yi,Yankun Sun,Zengqi Cui,Yiwei Hu, 3291900100005 Jie Liu, Cong Xia,Wentian Cao,Tieshuan Fan, 3291900100006 Guohui Zhang,Ruirui Fan, Yang Li,Wei Jiang, 3291900100007 Yonghao Chen,You Lv,Weihua Jia,Zhiyong Zhang, 3291900100008 Haolei Chen,Zhen Chen,Maoyuan Zhao,Changqing Feng, 3291900100009 Shubin Liu) 3291900100010 INSTITUTE (3CPRBJG,3CPRIHP,3CPRHST) 3291900100011 (3CPRCPR) Xian Jiaotong University, Xian 3291900100012 REFERENCE (J,NIM/A,1058,168912,2024) 3291900100013 #doi:10.1016/j.nima.2023.168912 3291900100014 FACILITY (VDG,3CPRBJG) 4.5 MV Van de Graaff accelerator 3291900100015 INC-SOURCE (D-D) Through the 2H(d,n) reaction in the deuterium 3291900100016 gas target, quasi-monoenergetic neutrons were 3291900100017 produced. During the measurement, the deuteron beam 3291900100018 current was about 1.2 uA, and the neutron energy was 3291900100019 5.0 MeV in the direction of 0 degree with respect to 3291900100020 the deuteron beam line. 3291900100021 SAMPLE A 232Th(OH) 4 sample was located at the cathodes of 3291900100022 the TPC with diameter of 44.0 mm, thickness of 601.9 3291900100023 ug/cm2, number of nuclei of 1.808E19. 3291900100024 DETECTOR (TPC) The time projection chamber was used as the 3291900100025 fission fragments detector. 3291900100026 (FISCH,SCIN) The small parallel plate fission chamber 3291900100027 was used for the determination of the absolute 3291900100028 neutron flux. The EJ309 scintillator detector was 3291900100029 used as neutron detector to determine neutron energy 3291900100030 spectrum with the unfolding method. 3291900100031 MONITOR 2(92-U-238(N,F),,SIG)) 3291900100032 MONIT-REF 2(,,3,ENDF/B-VIII.0,9237,2018) 3291900100033 ERR-ANALYS (ERR-T) The total uncertainty, 10.1% 3291900100034 (ERR-1) The numbers of 238U nucleus 3291900100035 (ERR-2) The numbers of 232Th nucleus 3291900100036 (ERR-3) The net fission counts of the 232Th(n,f) 3291900100037 (ERR-4) The net fission counts of the 238U(n,f) 3291900100038 (ERR-5) The detection efficiency of the small fission 3291900100039 chamber 3291900100040 (ERR-6) The detection efficiency of fission events 3291900100041 (ERR-7) The correction coefficient of fission events 3291900100042 induced by low-energy neutrons 3291900100043 (ERR-8) The ratio of the average main neutron flux in 3291900100044 the area of the 238U3O8 sample to that in the area of 3291900100045 the 232Th(OH)4 sample 3291900100046 HISTORY (20241010C) Compiled by Liu Yangyang (CNDC) 3291900100047 ENDBIB 45 0 3291900100048 COMMON 8 6 3291900100049 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 3291900100050 ERR-7 ERR-8 3291900100051 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3291900100052 PER-CENT PER-CENT 3291900100053 1.0 1.5 1.7 0.6 1.0 2.03291900100054 3.7 8.6 3291900100055 ENDCOMMON 6 0 3291900100056 ENDSUBENT 55 0 3291900199999 SUBENT 32919002 20241010 20250110 3291900200001 BIB 2 4 3291900200002 REACTION 1((90-TH-232(N,F),,SIG)/(92-U-238(N,F),,SIG)) 3291900200003 2(90-TH-232(N,F),,SIG) 3291900200004 STATUS (TABLE,,Haofan Bai+,J,NIM/A,1058,168912,2024) 3291900200005 The ratio obtained from Haofan Bai 3291900200006 ENDBIB 4 0 3291900200007 NOCOMMON 0 0 3291900200008 DATA 7 1 3291900200009 EN EN-ERR DATA 1DATA 2ERR-T 2MONIT 23291900200010 MONIT-ERR 2 3291900200011 MEV MEV NO-DIM B B B 3291900200012 PER-CENT 3291900200013 5.00 0.19 0.242 0.135 0.014 0.5493291900200014 1.5 3291900200015 ENDDATA 6 0 3291900200016 ENDSUBENT 15 0 3291900299999 ENDENTRY 2 0 3291999999999