ENTRY 41254 20241212 4125400000001 SUBENT 41254001 20241212 20250711 4125400100001 BIB 12 31 4125400100002 TITLE Nu-bar, mean number of neutrons produced in fission of4125400100003 U238 by of 14-MeV neutrons 4125400100004 AUTHOR (N.N.Flerov,E.A.Tamanov) 4125400100005 REFERENCE (J,SJA,5,1596,1959) English translation 4125400100006 (J,AE,5,654,1958) Issue 6. Main reference 4125400100007 (J,JNE/A,11,171,1960) English translation 4125400100008 INSTITUTE (4RUSKUR) 4125400100009 EXP-YEAR (1955) 4125400100010 FACILITY (VDG) Ion accelerating tube 4125400100011 DETECTOR (BF3) Battery of six B-F3 counters, B-10 enrichment 4125400100012 is 71.6 % 4125400100013 METHOD (COINC) Two-fold coincidence between neutrons 4125400100014 emitted during a single fission event. 4125400100015 SAMPLE .Spherical samples of natural uranium (6.4 cm diameter)4125400100016 or lead (8.5 cm diameter) placed in the center 4125400100017 of water cube 4125400100018 CORRECTION .Corrections were introduced on coincidence background4125400100019 on the whole assembly background, on the spontaneous 4125400100020 fission of U-238, on U-238 fission due to scattered 4125400100021 neutrons 4125400100022 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4125400100023 article. 4125400100024 HISTORY (19830816C) ! ! Compiled at NNDC 4125400100025 (19970620T) + + Converted at the center - CJD 4125400100026 (19970724U) * * Institute code corrected 4125400100027 (20000125U) . . Corrected at CJD 4125400100028 (20000125U) Last checking has been done. 4125400100029 (20050827U) Correction according to Memo CP-E/70 4125400100030 (20070420U) References year was corrected. M.M. 4125400100031 (20241212U) M.M. Upper -> lower case correction. 4125400100032 STATUS information was updated. 4125400100033 ENDBIB 31 0 4125400100034 COMMON 1 3 4125400100035 EN 4125400100036 EV 4125400100037 1.4E+07 4125400100038 ENDCOMMON 3 0 4125400100039 ENDSUBENT 38 0 4125400199999 SUBENT 41254002 20241212 20250711 4125400200001 BIB 9 21 4125400200002 REACTION (92-U-238(N,F),PR,NU) 4125400200003 MONITOR (82-PB-0(N,2N),,SIG) 4125400200004 MONIT-REF (40425001,N.N.Flerov+,J,AE,5,657,195811) 4125400200005 ANALYSIS See formula (6) in the article. 4125400200006 ASSUMED (ASSUM1,82-PB-0(N,INL)82-PB-0,,SIG) 4125400200007 (ASSUM2,92-U-238(N,F),,SIG) 4125400200008 (ASSUM3,92-U-238(N,INL)92-U-238,,SIG) 4125400200009 SIG(n,2n) = SIGinl - SIGfis was assumed. 4125400200010 CORRECTION For effect from inelastic interactions. 4125400200011 For binomial distribution of NU - 3.5 - 5 %. 4125400200012 REL-REF (R,,N.N.Flerov+,J,AE,4,155,1956) 4125400200013 (R,,N.N.Flerov+,J,AE,5,657,1958) 4125400200014 (R,41254003,N.N.Flerov+,J,AE,5,654,1958) 4125400200015 (A,40806005,N.N.Flerov+,J,AE,5,653,1958) 4125400200016 Previous measurement by different 4125400200017 method at 1954 year - 4.50+-0.32 n/fis. 4125400200018 (A,,S.Blaize+,S,TID-7547,1957) =C,57COLUMBIA,,,1957 4125400200019 STATUS (TABLE,,N.N.Flerov+,J,SJA,5,1596,1959) Text page 1599 4125400200020 HISTORY (19970620T) * * Converted from Subent 80390002 4125400200021 (20000125U) . . Correlation established 4125400200022 (20000125U) Last checking has been done. 4125400200023 ENDBIB 21 0 4125400200024 COMMON 6 3 4125400200025 ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR ASSUM3 ASSUM3-ERR 4125400200026 B B B B B B 4125400200027 2.54 0.05 1.13 0.05 2.85 0.10 4125400200028 ENDCOMMON 3 0 4125400200029 DATA 4 1 4125400200030 DATA DATA-ERR MONIT MONIT-ERR 4125400200031 PRT/FIS PRT/FIS B B 4125400200032 4.45 0.35 2.3 0.19 4125400200033 ENDDATA 3 0 4125400200034 ENDSUBENT 33 0 4125400299999 SUBENT 41254003 20241212 20250711 4125400300001 BIB 4 5 4125400300002 REACTION (92-U-238(N,INL)92-U-238,,SIG,,,DERIV) 4125400300003 ANALYSIS Extrapolation of data from AE, vol.1,n.4, p.155,1956 4125400300004 STATUS (TABLE,,N.N.Flerov+,J,SJA,5,1596,1959) Text page 1599 4125400300005 HISTORY (20000125C) Compiled at CJD 4125400300006 (20241212A) EVAL -> DERIV 4125400300007 ENDBIB 5 0 4125400300008 NOCOMMON 0 0 4125400300009 DATA 2 1 4125400300010 DATA DATA-ERR 4125400300011 B B 4125400300012 2.85 0.10 4125400300013 ENDDATA 3 0 4125400300014 ENDSUBENT 13 0 4125400399999 ENDENTRY 3 0 4125499999999