ENTRY 32555 20191003 31923255500000001 SUBENT 32555001 20191003 31923255500100001 BIB 15 50 3255500100002 TITLE Measurement of the neutron capture cross section of 3255500100003 181Ta 3255500100004 AUTHOR (Xia Yijun, Yang Jinfu, Guo Huachong, Wang Minghua, 3255500100005 Xie Bizheng, Wang Shiming) 3255500100006 INSTITUTE (3CPRSIU) 3255500100007 REFERENCE (J,CST,22,315,1988) 3255500100008 FACILITY (VDG,3CPRSIU) Pulsed 2.5 MeV Van de Graaff 3255500100009 INC-SOURCE (P-LI7) 7Li target (1 mg/cm2 thick) and Ta 3255500100010 (0.2 mm thick) 3255500100011 The neutron beam was kinematically collimated neutron. 3255500100012 The neutron energy spectrum was adjusted by changing 3255500100013 the proton energy, thickness of targets and cooling 3255500100014 water. 3255500100015 SAMPLE The metal sample parameters are as following: 3255500100016 weight thickness thickness purify 3255500100017 (grams) (atom/b) (mm) (%) 3255500100018 Au 4.7607 1.158e-3 0.25 99.9 3255500100019 Ta 6.3572 1.683e-3 0.30 99.9 3255500100020 C 2.3834 9.542e-3 1.40 3255500100021 METHOD (TOF) 70.0 mm flight path 3255500100022 DETECTOR (MOXR) for gamma detection 3255500100023 (GLASD) Li-6 glass detector for neutron spectrum 3255500100024 measurement 3255500100025 (LONGC) to monitor neutron flux at 20 deg and 1.7 m 3255500100026 away from the target 3255500100027 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3255500100028 MONIT-REF (,Jiang Songsheng,R,HSJ-77141,197805) 3255500100029 CORRECTION Corrected for 3255500100030 - multiple scattering (1.033-1.069) 3255500100031 - self-sheilding (0.976-0.985) 3255500100032 - gamma-ray self-sabsorption (0.98) 3255500100033 - Linearity of Moxon-Rae detector efficiency (1.022) 3255500100034 ERR-ANALYS (ERR-T) Total uncertainty 3255500100035 (ERR-S) Total statistical uncertainty 3255500100036 (ERR-SYS) Total systematic uncertainty 3255500100037 (ERR-1,0.9,7.) flight path length - 181Ta (0.9-7%)3255500100038 (ERR-2,1.3,6.) flight path length - 197Au (1.3-6%)3255500100039 (ERR-3,1.,1.5) background - 181Ta (1-1.5%)3255500100040 (ERR-4,1.,2.) background - 197Au (1-2%)3255500100041 (ERR-5) multiple scatt., self-abs. - 181Ta(0.7%)3255500100042 (ERR-6) multiple scatt., self-abs. - 197Au(0.7%)3255500100043 (ERR-7) gamma self-absorption - 181Ta (0.4%)3255500100044 (ERR-8) gamma self-absorption - 197Au (0.4%)3255500100045 (ERR-9,0.5,1.5) neutron energy spectrum (0.5-1.5%)3255500100046 (ERR-10) efficiency of detector (1.0%)3255500100047 (ERR-11,3.0,4.0) standard cross section (3.0-4.0%)3255500100048 STATUS (TABLE) Table 4 of Atom. Energy Sci.Technol.22(1988)3153255500100049 HISTORY (20010515C) by Chen Guochang 3255500100050 (20021106A) OS. Lab code corrected, MONIT-REF added. 3255500100051 (20191003A) On. ERR-ANALYS updated. Major rev. in 002. 3255500100052 ENDBIB 50 0 3255500100053 COMMON 5 3 3255500100054 ERR-5 ERR-6 ERR-7 ERR-8 ERR-10 3255500100055 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3255500100056 0.7 0.7 0.4 0.4 1.0 3255500100057 ENDCOMMON 3 0 3255500100058 ENDSUBENT 57 0 3255500199999 SUBENT 32555002 20191003 31923255500200001 BIB 2 2 3255500200002 REACTION (73-TA-181(N,G)73-TA-182,,SIG) 3255500200003 HISTORY (20191003A) On. ERR-S+ERR-SYS added. EN-ERR->EN-RSL-HW.3255500200004 ENDBIB 2 0 3255500200005 NOCOMMON 0 0 3255500200006 DATA 6 20 3255500200007 EN EN-RSL-HW DATA ERR-S ERR-SYS ERR-T 3255500200008 KEV KEV MB PER-CENT PER-CENT PER-CENT 3255500200009 11.2 0.36 1354. 8.9 6. 11.0 3255500200010 12.0 0.40 1449. 8.2 5.6 9.9 3255500200011 12.9 0.49 1251. 7.9 5.6 9.7 3255500200012 14.0 0.50 1233. 7.1 5.5 9.0 3255500200013 15.1 0.56 1319. 7.1 5.4 8.9 3255500200014 16.4 0.64 1111. 6.2 5.4 8.2 3255500200015 17.9 0.73 984. 5.4 5.2 7.5 3255500200016 19.6 0.84 988. 4.5 4.5 6.4 3255500200017 21.6 0.96 944. 4.4 4.4 6.2 3255500200018 23.9 1.1 935. 3.8 4.5 5.9 3255500200019 25.6 1.3 804. 3.2 4.4 5.4 3255500200020 29.6 1.6 768. 3.0 4.4 5.3 3255500200021 33.3 1.9 725. 2.6 4.3 5.1 3255500200022 37.8 2.2 697. 2.5 4.4 5.1 3255500200023 43.2 2.7 598. 2.2 4.4 4.9 3255500200024 49.8 3.4 557. 2.0 4.2 4.7 3255500200025 58.1 4.3 520. 1.9 4.0 4.4 3255500200026 68.6 5.5 471. 1.8 4.4 4.8 3255500200027 82.3 7.2 438. 1.8 6.1 6.4 3255500200028 100.0 9.8 363. 3.1 10.6 11.0 3255500200029 ENDDATA 22 0 3255500200030 ENDSUBENT 29 0 3255500299999 ENDENTRY 2 0 3255599999999