ENTRY 32244 20240216 32133224400000001 SUBENT 32244001 20240216 32133224400100001 BIB 14 29 3224400100002 TITLE Measuring neutron absorption cross section 3224400100003 AUTHOR (E.A.Pavlenko, N.L.Gnidak) 3224400100004 INSTITUTE (4UKRIJD) 3224400100005 REFERENCE (J,IET,20,653,1977) 3224400100006 (J,PTE,,(3),42,1977) Russ.org. of IET,20,653,1977 3224400100007 FACILITY (REAC,4UKRIJD) Reactor WWR-M 3224400100008 SAMPLE Thin sample (n*sigma<0.2), 10 mm in diameter for 3224400100009 samples and scatterer (fluoroplastic) 3224400100010 METHOD The neutrons scattered by two samples located one 3224400100011 after another along the beam were registered. 3224400100012 Neutron absorption by one of which (scatterer) is 3224400100013 negligible. 3224400100014 The difference in the counting of the detector when 3224400100015 the position of the sample and the scatterer is 3224400100016 changed is proportional to the number of neutrons 3224400100017 absorbed by the sample under study. 3224400100018 Cd plate 1 mm thick was used to separate effect due to 3224400100019 thermal neutrons. 3224400100020 DETECTOR (HE3SP) length 500 mm, width 150 mm, close to 4pi 3224400100021 geometry, detection efficiency of ~95% 3224400100022 CORRECTION Corrected for multiple scattering calculated by 3224400100023 Monte Carlo method 3224400100024 ASSUMED (ASSUM,79-AU-197(N,G)79-AU-198,,SIG) 3224400100025 Cross section from REL-REF at an energy of 0.0253 eV 3224400100026 REL-REF (R,,S.Mughabghab+,R,INDC(USA)-58,(1),1973) 3224400100027 ERR-ANALYS (DATA-ERR) No information on source of uncertainty 3224400100028 STATUS (TABLE,,E.A.Pavlenko+,J,IET,20,653,1977) Table 1 3224400100029 HISTORY (20180115C) UKRNDC 3224400100030 (20240216U) On. STATUS updated. 3224400100031 ENDBIB 29 0 3224400100032 COMMON 3 3 3224400100033 EN-DUMMY ASSUM ASSUM-ERR 3224400100034 EV B B 3224400100035 0.0253 98.8 0.3 3224400100036 ENDCOMMON 3 0 3224400100037 ENDSUBENT 36 0 3224400199999 SUBENT 32244002 20180115 31823224400200001 BIB 1 1 3224400200002 REACTION (23-V-0(N,ABS),,SIG,,SPA) 3224400200003 ENDBIB 1 0 3224400200004 NOCOMMON 0 0 3224400200005 DATA 2 1 3224400200006 DATA DATA-ERR 3224400200007 B B 3224400200008 5.03 0.13 3224400200009 ENDDATA 3 0 3224400200010 ENDSUBENT 9 0 3224400299999 SUBENT 32244003 20180115 31823224400300001 BIB 1 1 3224400300002 REACTION (28-NI-0(N,ABS),,SIG,,SPA) 3224400300003 ENDBIB 1 0 3224400300004 NOCOMMON 0 0 3224400300005 DATA 2 1 3224400300006 DATA DATA-ERR 3224400300007 B B 3224400300008 4.47 0.35 3224400300009 ENDDATA 3 0 3224400300010 ENDSUBENT 9 0 3224400399999 SUBENT 32244004 20180115 31823224400400001 BIB 1 1 3224400400002 REACTION (21-SC-45(N,ABS),,SIG,,SPA) 3224400400003 ENDBIB 1 0 3224400400004 NOCOMMON 0 0 3224400400005 DATA 2 1 3224400400006 DATA DATA-ERR 3224400400007 B B 3224400400008 28.2 1.0 3224400400009 ENDDATA 3 0 3224400400010 ENDSUBENT 9 0 3224400499999 SUBENT 32244005 20180115 31823224400500001 BIB 1 1 3224400500002 REACTION (70-YB-0(N,ABS),,SIG,,SPA) 3224400500003 ENDBIB 1 0 3224400500004 NOCOMMON 0 0 3224400500005 DATA 2 1 3224400500006 DATA DATA-ERR 3224400500007 B B 3224400500008 35.5 1.4 3224400500009 ENDDATA 3 0 3224400500010 ENDSUBENT 9 0 3224400599999 ENDENTRY 5 0 3224499999999