ENTRY 32910 20240205 3291000000001 SUBENT 32910001 20240205 20250110 3291000100001 BIB 11 46 3291000100002 TITLE Measurement of Cumulative fission product yields on 3291000100003 U-235 induced by 2.8 MeV neutrons 3291000100004 AUTHOR (Yujie Ge,Changlin Lan,Huiyi Lv,Xianlin Yang, 3291000100005 Yuting Wei,Fangxiao Lu,Jiahao Wang,Gong Jiang,Bo Li, 3291000100006 Yi Yang,Xichao Ruan) 3291000100007 INSTITUTE (3CPRLNZ,3CPRAEP) 3291000100008 (3CPRCPR) Southwest University of Science and 3291000100009 Technology,Mianyang 3291000100010 REFERENCE (J,ARI,200,110907,2023) 3291000100011 #doi:10.1016/j.apradiso.2023.110907 3291000100012 FACILITY (CCW,3CPRAEP) CPNG-600 Cockcroft Walton accelerator 3291000100013 INC-SOURCE (D-D) The 2.8 MeV neutrons were obtained by 3291000100014 bombarding a Ti-D target with a deuterium beam of 300 3291000100015 keV energy. 3291000100016 SAMPLE (92-U-235,ENR=0.8949) The uranium target with purity 3291000100017 99.9%, is a thin slice with a side length of 1.5 cm, 3291000100018 a thickness of 1 mm, and a mass of 0.74 g. The mass 3291000100019 abundance of uranium isotopes includes U-234(1.15%) , 3291000100020 U-235(89.49%), U-236(0.23%) and U-238(9.13%) . 3291000100021 DETECTOR (HPGE) The HPGe gamma-ray spectrometer system is 3291000100022 mainly composed of a GEM30P4 HPGe gamma-ray detector 3291000100023 produced by ORTEC. The resolution of the HPGe 3291000100024 gamma-ray detector is about 1.7 keV at 1.33 MeV. 3291000100025 Three standard sources (Ba-133, Eu-152, and Co-60) 3291000100026 with known activities were applied to the energy 3291000100027 calibration and efficiency calibration. 3291000100028 (SIBAR) Based on the He-3-particles from the D-D 3291000100029 reaction measured by the Au-Si surface barrier 3291000100030 detector, the average neutron flux was determined to 3291000100031 be 9.24E8 (/s) . 3291000100032 METHOD (GSPEC) The uranium target was irradiated for 105 h. 3291000100033 After cooling for 8.855 h, the counts of the 3291000100034 full-energy peak of gamma rays emitted by various 3291000100035 fission products were measured by HPGe gamma-ray 3291000100036 spectroscopy. 3291000100037 (ASSOP) The average neutron flux was determined based 3291000100038 on the He-3 particles from the D-D reaction measured 3291000100039 by the Au-Si surface barrier detector. This method 3291000100040 also monitored the neutron flux fluctuation. 3291000100041 CORRECTION The needed corrections containing: 3291000100042 (1) isotope correction of uranium, 3291000100043 (2) coincidence summing correction in gamma-ray 3291000100044 cascade radiation, 3291000100045 (3) self-absorption correction, 3291000100046 (4) neutron fluency fluctuation correction. 3291000100047 HISTORY (20240205C) Hao Lu (CNDC) 3291000100048 ENDBIB 46 0 3291000100049 NOCOMMON 0 0 3291000100050 ENDSUBENT 49 0 3291000199999 SUBENT 32910002 20240205 20250110 3291000200001 BIB 6 22 3291000200002 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY) 3291000200003 DECAY-DATA ((1.)38-SR-91,9.65HR,DG,749.8,0.237) 3291000200004 ((2.)38-SR-92,2.611HR,DG,1438.93,0.90) 3291000200005 ((3.)40-ZR-97,16.749HR,DG,743.36,0.9309) 3291000200006 ((4.)42-MO-99,65.924HR,DG,739.5,0.1220) 3291000200007 ERR-ANALYS (ERR-T) The total uncertainty. 3291000200008 (ERR-1) The uncertainty of gamma-ray count. 3291000200009 (ERR-2,0.27,1.24) The uncertainty of gamma-ray full- 3291000200010 energy peak efficiency. 3291000200011 (ERR-3) The uncertainty introduced by the mass. 3291000200012 spectrometer in isotopic abundance measurement. (1.%) 3291000200013 (ERR-4) The uncertainty of self-absorption. (0.3%) 3291000200014 (ERR-5,2.36,5.71) The uncertainty of neutron flux 3291000200015 density. 3291000200016 (ERR-6) The uncertainty of fission cross-section of U- 3291000200017 235(n,f) reaction. (0.67%) 3291000200018 ASSUMED (ASSUM,92-U-235(N,F),,SIG) 3291000200019 1.24085775 b at 2.8 MeV taken from the TABLE XIV 3291000200020 of Carlson et al., 2009 (Changlin Lan, 20240925). 3291000200021 REL-REF (R,,A.D.Carlson+,J,NDS,110,3215,2009) U-235(n,f) 3291000200022 cross section at 2.8 MeV 3291000200023 STATUS (TABLE,,Yujie Ge+,J,ARI,200,110907,2023) Table 7 3291000200024 ENDBIB 22 0 3291000200025 COMMON 5 3 3291000200026 EN ASSUM ERR-3 ERR-4 ERR-6 3291000200027 MEV B PER-CENT PER-CENT PER-CENT 3291000200028 2.8 1.24085775 1. 0.3 0.67 3291000200029 ENDCOMMON 3 0 3291000200030 DATA 6 4 3291000200031 MASS ELEMENT DATA ERR-T ERR-1 DECAY-FLAG 3291000200032 NO-DIM NO-DIM PC/FIS PC/FIS PER-CENT NO-DIM 3291000200033 91. 38. 5.65 0.35 1.95 1.3291000200034 92. 38. 5.48 0.39 3.82 2.3291000200035 97. 40. 5.77 0.35 0.79 3.3291000200036 99. 42. 5.90 0.37 1.98 4.3291000200037 ENDDATA 6 0 3291000200038 ENDSUBENT 37 0 3291000299999 ENDENTRY 2 0 3291099999999