ENTRY 32847 20220105 32073284700000001 SUBENT 32847001 20220105 32073284700100001 BIB 14 43 3284700100002 TITLE Study of the experimental method of (n,2n) reaction 3284700100003 cross cection determination with direct neutron 3284700100004 measurements 3284700100005 AUTHOR (Jiang Jing,Wang Liming,Nie Yangbo,Ruan Xichao, 3284700100006 Huang Hanxiong,Li Xia) 3284700100007 INSTITUTE (3CPRAEP) 3284700100008 (3CPRCPR) Nuclear and Radiation Safety Center, Beijing 3284700100009 (3CPRCPR) State Nuclear Security Technology Center, 3284700100010 Beijing 3284700100011 REFERENCE (J,CNPR,32,435,2015) 3284700100012 #doi:10.11804/NuclPhysRev.32.04.435 3284700100013 (T,JIANG,35,200608) Jiang Jing, PhD thesis submitted to3284700100014 China Institute of Atomic Energy (CIAE) in Aug. 2006 3284700100015 FACILITY (VDGT,3CPRAEP) HI-13 Tandem Accelerator 3284700100016 INC-SOURCE (D-D) 3284700100017 SAMPLE Cylindrical metal thulium wiht a diameter of 25 mm, 3284700100018 height of 30 mm and purity of 99.44%. 3284700100019 DETECTOR (SCIN) Four BC-501A liquid scintillation detectors at 3284700100020 30, 60, 120 and 150 deg, the distance from the sample 3284700100021 is 50 cm. A ST-451 liquid scintillation detector was 3284700100022 placed at about 70 deg with the beam direction, and 3284700100023 the distance from the sample is about 250 cm, to 3284700100024 measure the elastic scattered neutrons from the 169Tm 3284700100025 sample as the normalization of the cross section. 3284700100026 (TELES,SIBAR,SIBAR) A polyethylene film was placed 3284700100027 between the sample and the neutron source. The recoil 3284700100028 protons from the polyethylene film were measured by a 3284700100029 gold silicon surface barrier telescope to monitor the 3284700100030 neutron flux, at 23 deg with the beam. 3284700100031 MONITOR (69-TM-169(N,EL)69-TM-169,,DA) 3284700100032 MONIT-REF (,,3,ENDF/B-VII.1,6925,2011) 3284700100033 METHOD (COINC) Detection of two outgoing neutrons by a 3284700100034 BC-501A liquid scintillation detector at 90 deg with 3284700100035 four BC-501A liquid scintillation detectors at 30, 60, 3284700100036 120 and 150 deg in coincidence respectively. 3284700100037 ERR-ANALYS (ERR-T) Total uncertainty 3284700100038 (ERR-S) Counting statistics, 5% 3284700100039 (ERR-1) Detector efficiency, 5% 3284700100040 (ERR-2) N-P scattering cross section, 1% 3284700100041 (MONIT-ERR) Elastic scattering cross section, 10% 3284700100042 STATUS (TABLE) Numerical data taken from Jiang's thesis. 3284700100043 (APRVD) Approved by Jiang Jing (2022-03-23) 3284700100044 HISTORY (20220105C) Jimin Wang and Wenye Wang (CNDC) 3284700100045 ENDBIB 43 0 3284700100046 COMMON 4 3 3284700100047 ERR-S ERR-1 ERR-2 MONIT-ERR 3284700100048 PER-CENT PER-CENT PER-CENT PER-CENT 3284700100049 5. 5. 1. 10. 3284700100050 ENDCOMMON 3 0 3284700100051 ENDSUBENT 50 0 3284700199999 SUBENT 32847002 20220105 32073284700200001 BIB 1 1 3284700200002 REACTION (69-TM-169(N,2N)69-TM-168,,SIG) 3284700200003 ENDBIB 1 0 3284700200004 NOCOMMON 0 0 3284700200005 DATA 3 1 3284700200006 EN DATA ERR-T 3284700200007 MEV MB MB 3284700200008 14.3 1649.7 421.1 3284700200009 ENDDATA 3 0 3284700200010 ENDSUBENT 9 0 3284700299999 ENDENTRY 2 0 3284799999999