ENTRY 32897 20241212 32173289700000001 SUBENT 32897001 20241212 32173289700100001 BIB 14 58 3289700100002 TITLE Cumulative fission yield measurements with 14.7 MeV 3289700100003 neutrons on 238U 3289700100004 AUTHOR (Xianlin Yang,Changlin Lan,Yangbo Nie,Liyang Jiang, 3289700100005 Yijia Qiu,Yujie Ge,Hongtao Chen,Kai Zhang,Yuting Wei, 3289700100006 Jiahao Wang,Gong Jiang,Xichao Ruan,Yi Yang) 3289700100007 INSTITUTE (3CPRLNZ,3CPRAEP) 3289700100008 REFERENCE (J,CPH/C,47,024001,2023) 3289700100009 #doi:10.1088/1674-1137/acalab 3289700100010 FACILITY (NGEN,3CPRNPC) K-400 neutron generator, the yield is 3289700100011 approximately 3.0E10 n/4Pi/s 3289700100012 INC-SOURCE (D-T) The T(d,n)4He reaction with a deuteron beam 3289700100013 (250 keV, 180 uA) produced 14 MeV neutrons. 3289700100014 SAMPLE (92-U-238,NAT=0.999) Two natural U3O8 powder samples 3289700100015 (99.9% purity) were made into round disks of 20 mm 3289700100016 diameter with thicknesses 1.1 mm (U-1 sample) and 3289700100017 1.0 mm (U-2 sample). Each sample was placed between 3289700100018 a Nb foil (20 mm diameter, 0.01 mm thickness, 3289700100019 99.999% purity) and Zr foil (20 mm diameter, 3289700100020 0.01 mm thickness, 99.99% purity). The sandwich 3289700100021 sample was covered with a Cd box for preventing 3289700100022 scattering of thermal neutrons. 3289700100023 DETECTOR (SIBAR) The Au-Si detector relative to the deuteron 3289700100024 beam at 135 deg monitored the accompanying 4He 3289700100025 particle to measure the neutron yield and neutron 3289700100026 flux per 10 s, which would give a correction for 3289700100027 neutron fluctuation. 3289700100028 (HPGE) A series of standard point sources (22Na, 3289700100029 60Co, 133Ba,137Cs, 152Eu) of known activity were used 3289700100030 to determine the absolute full energy peak efficiency 3289700100031 of a lead-shielded high purity germanium detector 3289700100032 with a relative efficiency of 68% and an energy 3289700100033 resolution of 1.82 keV at 1.33 MeV for 60Co. 3289700100034 METHOD (ACTIV) The irradiation time of the U-1 sample was 3289700100035 60 min for the measurement of fission product nuclei 3289700100036 with a lifetime of a few hours. To measure 3289700100037 longer-lived fission product nuclei, the U-2 sample 3289700100038 was irradiated for 17 h. The U-1 sample was measured 3289700100039 at a distance of 9 cm from the detector after 3289700100040 76.53 min of cooling. The U-1 and U-2 samples were 3289700100041 measured after 22.08 h and 20.59 days, respectively, 3289700100042 at a distance of 4.5 cm from the detector. 3289700100043 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) Monitor neutron flux 3289700100044 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3289700100045 CORRECTION The photon attenuation, neutron flux fluctuation, 3289700100046 cascade summing correction, scattered neutron 3289700100047 correction, dead time correction, and isotopic 3289700100048 impurities. 3289700100049 ERR-ANALYS (ERR-T) Total uncertainty (4.62%-16.45%) 3289700100050 (ERR-1,0.1,5.) Photoelectric peak area 3289700100051 (ERR-2,2.0,3.0) Photoelectric peak detection efficiency3289700100052 (ERR-3,0.1,15.) Gamma ray emission probability 3289700100053 (ERR-4) Cross section of 238U(n,f) 3289700100054 (ERR-5,0.01,0.93) Half-life 3289700100055 (ERR-6) Gamma-ray absorption 3289700100056 (ERR-7) Target mass 3289700100057 (ERR-8) Neutron flux correction 3289700100058 (ERR-9,,3.) Coincidence summing 3289700100059 HISTORY (20241212C) Yiming He and Jimin Wang 3289700100060 ENDBIB 58 0 3289700100061 COMMON 5 3 3289700100062 ERR-4 ERR-6 ERR-7 ERR-8 MONIT 3289700100063 PER-CENT PER-CENT PER-CENT PER-CENT B 3289700100064 0.6 1. 0.01 5. 0.457 3289700100065 ENDCOMMON 3 0 3289700100066 ENDSUBENT 65 0 3289700199999 SUBENT 32897002 20241212 32173289700200001 BIB 4 23 3289700200002 REACTION (92-U-238(N,F)ELEM/MASS,CUM,FY) 3289700200003 DECAY-DATA ((1.)38-SR-91,9.65HR,DG,1024.3,0.335) 3289700200004 ((2.)38-SR-92,2.611HR,DG,1383.93,0.90) 3289700200005 ((3.)39-Y-93-G,10.18HR,DG,266.9,0.073) 3289700200006 ((4.)40-ZR-95,64.032D,DG,756.73,0.5438) 3289700200007 ((5.)40-ZR-97,16.749HR,DG,743.36,0.9309) 3289700200008 ((6.)42-MO-99,65.924HR,DG,739.5,0.1220) 3289700200009 ((7.)44-RU-103,39.247D,DG,610.3,0.0576) 3289700200010 ((8.)44-RU-105,4.44HR,DG,724.4,0.473) 3289700200011 ((9.)51-SB-127,3.85D,DG,685.7,0.368) 3289700200012 ((10.)50-SN-128-G,59.07MIN,DG,482.3,0.59) 3289700200013 ((11.)53-I-131,8.0252D,DG,364.49,0.815) 3289700200014 ((12.)52-TE-132,3.204D,DG,228.1,0.88) 3289700200015 ((13.)53-I-133-G,20.83HR,DG,529.87,0.870) 3289700200016 ((14.)52-TE-134,40.8MIN,DG,767.2,0.295) 3289700200017 ((15.)53-I-135,6.58HR,DG,1260.41,0.287) 3289700200018 ((16.)56-BA-140,12.7527D,DG,537.26,0.2439) 3289700200019 ((17.)57-LA-142,91.1MIN,DG,641.3,0.474) 3289700200020 ((18.)58-CE-143,33.039HR,DG,293.27,0.428) 3289700200021 ((19.)60-ND-147,10.98D,DG,531.01,0.134) 3289700200022 ((20.)60-ND-149,1.728HR,DG,270.17,0.107) 3289700200023 ASSUMED (ASSUM,92-U-238(N,F),,SIG) 3289700200024 STATUS (TABLE,,Xianlin Yang+,J,CPH/C,47,024001,2023) Table 4 3289700200025 ENDBIB 23 0 3289700200026 COMMON 3 3 3289700200027 EN EN-RSL-HW ASSUM 3289700200028 MEV MEV B 3289700200029 14.7 0.2 1.21 3289700200030 ENDCOMMON 3 0 3289700200031 DATA 5 20 3289700200032 ELEMENT MASS DATA ERR-T DECAY-FLAG 3289700200033 NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 3289700200034 38. 91. 3.56 0.21 1. 3289700200035 38. 92. 3.78 0.30 2. 3289700200036 39. 93. 3.99 0.63 3. 3289700200037 40. 95. 4.75 0.21 4. 3289700200038 40. 97. 5.08 0.22 5. 3289700200039 42. 99. 5.40 0.26 6. 3289700200040 44. 103. 4.70 0.23 7. 3289700200041 44. 105. 2.83 0.13 8. 3289700200042 50. 128. 1.15 0.12 10. 3289700200043 51. 127. 1.05 0.19 9. 3289700200044 52. 132. 4.91 0.20 12. 3289700200045 52. 134. 6.70 0.34 14. 3289700200046 53. 131. 4.24 0.19 11. 3289700200047 53. 133. 5.30 0.24 13. 3289700200048 53. 135. 5.60 0.30 15. 3289700200049 56. 140. 4.76 0.21 16. 3289700200050 57. 142. 4.08 0.19 17. 3289700200051 58. 143. 2.96 0.13 18. 3289700200052 60. 147. 2.08 0.11 19. 3289700200053 60. 149. 0.97 0.07 20. 3289700200054 ENDDATA 22 0 3289700200055 ENDSUBENT 54 0 3289700299999 ENDENTRY 2 0 3289799999999