ENTRY 32870 20230220 3287000000001 SUBENT 32870001 20230220 20231011 3287000100001 BIB 13 74 3287000100002 TITLE Neutron capture cross section of 169Tm measured at 3287000100003 the CSNS Back-n facility in the energy region from 30 3287000100004 to 300 keV 3287000100005 AUTHOR (Jie Ren,Xichao Ruan,Wei Jiang,Jie Bao,Jincheng Wang, 3287000100006 Qiwei Zhang,Guangyuan Luan,Hanxiong Huang,Yangbo Nie, 3287000100007 Zhigang Ge,Qi An,Huaiyong Bai,Yu Bao,Ping Cao, 3287000100008 Haolei Chen,Qiping Chen,Yonghao Chen,Yukai Chen, 3287000100009 Zhen Chen,Zengqi Cui,Ruirui Fan,Changqing Feng, 3287000100010 Keqing Gao,Minhao Gu,Changcai Han,Zijie Han,Guozhu He, 3287000100011 Yongcheng He,Yang Hong,Weiling Huang,Xiru Huang, 3287000100012 Xiaolu Ji,Xuyang Ji,Haoyu Jiang,Zhijie Jiang, 3287000100013 Hantao Jing,Ling Kang,Mingtao Kang,Bo Li,Chao Li, 3287000100014 Jiawen Li,Lun Li,Qiang Li,Xiao Li,Yang Li,Rong Liu, 3287000100015 Shubin Liu,Xingyan Liu,Qili Mu,Changjun Ning, 3287000100016 Binbin Qi,Zhizhou Ren,Yingpeng Song,Zhaohui Song, 3287000100017 Hong Sun,Kang Sun,Xiaoyang Sun,Zhijia Sun,Zhixin Tan, 3287000100018 Hongqing Tang,Jingyu Tang,Xinyi Tang,Binbin Tian, 3287000100019 Lijiao Wang,Pengcheng Wang,Qi Wang,Taofeng Wang, 3287000100020 Zhaohui Wang,Jie Wen,Zhongwei Wen,Qingbiao Wu, 3287000100021 Xiaoguang Wu,Xuan Wu,Likun Xie,Yiwei Yang,Han Yi, 3287000100022 Li Yu,Tao Yu,Yongji Yu,Guohui Zhang,Linhao Zhang, 3287000100023 Xianpeng Zhang,Yuliang Zhang,Zhiyong Zhang, 3287000100024 Yubin Zhao,Luping Zhou,Zuying Zhou,Danyang Zhu, 3287000100025 Kejun Zhu,Peng Zhu,The CSNS Back-n collaboration) 3287000100026 INSTITUTE (3CPRAEP,3CPRIHP,3CPRHST,3CPRBJG,3CPRNPC,3CPRNIX, 3287000100027 3CPRUCA,3CPRBHN) 3287000100028 (3CPRCPR) State Key Laboratory of Particle Detection 3287000100029 and Electronics 3287000100030 REFERENCE (J,CPH/C,46,044002,2022) 3287000100031 #doi:10.1088/1674-1137/ac4589 3287000100032 FACILITY (SYNCH,3CPRIHP) The Back-n white neutron source at 3287000100033 China Spallation Neutron Source (CSNS) 3287000100034 INC-SOURCE (SPALL) Neutrons are produced by slamming 1.6 GeV/c 3287000100035 proton beam, with double bunches per pulse, onto a 3287000100036 tungsten target with a typical repetition rate of 25 3287000100037 Hz. The pulse width of each bunch is 41 ns, and the 3287000100038 interval between the two bunches is 410 ns. The 3287000100039 neutron flux from thermal to 400 MeV can reach 1E7 3287000100040 n/cm2/s at the experimental stations, when the proton 3287000100041 bunches power of the CSNS is 100 kW. 3287000100042 SAMPLE The 169Tm sample (purity 99.995) was about 40.0 mm in 3287000100043 diameter, about 0.2 mm in thickness and about 2.42 g 3287000100044 in weight. 3287000100045 DETECTOR (SCIN) Four C6D6 liquid scintillator, each detector 3287000100046 was 127 mm in diameter and 76.2 mm in length, 3287000100047 contained in a 1.5-mm-thick aluminum capsule and 3287000100048 coupled with a photomultiplier tube. These detectors 3287000100049 were placed upstream of the sample relative to the 3287000100050 neutron beam, and the detector axis is at an angle of 3287000100051 125 degrees with respect to the neutron beam 3287000100052 direction. The distance between the center of the 3287000100053 front face of the detector and the sample center is 3287000100054 approximately 150 mm. 3287000100055 METHOD (TOF) The length of neutron flight path is 3287000100056 approximately 76 m. 3287000100057 (PHWT) Weighting function calculated by Geant4. 3287000100058 CORRECTION The correction for the normalization, the loss of low 3287000100059 energy counts below the threshold of the detectors, 3287000100060 the dead time during data acquisition and data 3287000100061 analysis, the neutron multiple scattering and 3287000100062 self-shielding. 3287000100063 ERR-ANALYS (ERR-T) The overall uncertainties 3287000100064 (ERR-S,,0.7) The statistical uncertainty 3287000100065 - The systematic uncertainty included the 3287000100066 uncertainties due to background subtraction, 3287000100067 normalization, and corrections for both 169Tm and 3287000100068 197Au as well as the uncertainty caused by the PHWT 3287000100069 method. 3287000100070 - The uncertainty of the standard cross 3287000100071 section recommended by the ENDF/B-VIII.0 library was 3287000100072 estimated to be in the order of 6.0% below 200 keV 3287000100073 and 4.0% between 200 and 300 keV. 3287000100074 STATUS (TABLE) Table 3 of Chinese Phys.C,46,044002,2022 3287000100075 HISTORY (20230220C) Jimin Wang (CNDC) 3287000100076 ENDBIB 74 0 3287000100077 NOCOMMON 0 0 3287000100078 ENDSUBENT 77 0 3287000199999 SUBENT 32870002 20230220 20231011 3287000200001 BIB 3 3 3287000200002 REACTION (69-TM-169(N,G)69-TM-170,,SIG,,AV) 3287000200003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3287000200004 MONIT-REF (,,3,ENDF/B-VIII.0,,2018) 3287000200005 ENDBIB 3 0 3287000200006 NOCOMMON 0 0 3287000200007 DATA 4 21 3287000200008 EN-MIN EN-MAX DATA ERR-T 3287000200009 KEV KEV MB PER-CENT 3287000200010 28.18 31.62 992.0 7.0 3287000200011 31.62 35.48 878.9 7.0 3287000200012 35.48 39.81 812.5 7.0 3287000200013 39.81 44.67 781.1 7.0 3287000200014 44.67 50.12 711.5 7.0 3287000200015 50.12 56.23 690.5 7.0 3287000200016 56.23 63.10 645.5 7.0 3287000200017 63.10 70.80 612.9 7.0 3287000200018 70.80 79.43 603.2 7.0 3287000200019 79.43 89.13 543.4 7.0 3287000200020 89.13 100.00 500.7 7.0 3287000200021 100.00 112.20 483.1 7.0 3287000200022 112.20 125.89 433.9 7.0 3287000200023 125.89 141.25 408.0 7.0 3287000200024 141.25 158.49 365.5 7.0 3287000200025 158.49 177.83 348.9 7.0 3287000200026 177.83 199.53 328.5 7.0 3287000200027 199.53 223.87 305.0 5.4 3287000200028 223.87 251.19 293.8 5.4 3287000200029 251.19 281.84 293.7 5.4 3287000200030 281.84 316.23 265.1 5.4 3287000200031 ENDDATA 23 0 3287000200032 ENDSUBENT 31 0 3287000299999 ENDENTRY 2 0 3287099999999