ENTRY 30745 20131010 31613074500000001 SUBENT 30745001 20131010 31613074500100001 BIB 13 36 3074500100002 TITLE Measuring the 235U alpha values at a thermal point 3074500100003 AUTHOR (Yu.V.Adamchuk, M.A.Voskanyan, G.Georgiev, A.L.Kovtun, 3074500100004 G.V.Muradyan, N.Stancheva, N.Chikov, N.Janeva, 3074500100005 Yu.G.Shchepkin) 3074500100006 INSTITUTE (4RUSKUR,3BULBLA) 3074500100007 REFERENCE (J,SJA,65,1022,1988) Revised value given 3074500100008 (J,AE,65,434,1988) Russian ver. of J,SJA,65,1022,1988 3074500100009 (J,CRB,39,(10),59,1986) full description 3074500100010 (P,INDC(BUL)-008,3,1983) No data given 3074500100011 REL-REF (M,,Yu.V.Adamchuk+,J,BJP,13,193,1986) 3074500100012 Description of experimental method (in Russian) 3074500100013 (I,,Yu.V.Adamchuk+,J,NIM/A,236,105,1985) 3074500100014 Description of spectrometer 3074500100015 FACILITY (REAC,3BULBLA) IRT-2000 reactor 3074500100016 INC-SPECT Thermal neutrons from the reactor passed through a 3074500100017 many-slitted converging collimator, then they were 3074500100018 monochromatized using a two-disk mechanical selector. 3074500100019 SAMPLE Al foil (10 um) with a two-sided layer of 235U (2 mg/cm3074500100020 thick) and total 235U mass of 20 mg. 3074500100021 METHOD Multiplicity spectrometry method. 3074500100022 Neutron beam monocromatized by special chopper. 3074500100023 (TOF) Flight distance= 3 m, energy resolution= 12.5% 3074500100024 (COINC) Gamma TOF spectra N(k,i) (k:gamma multiplicity 3074500100025 1 to 12) with and without coincidence with fission 3074500100026 fragments 3074500100027 DETECTOR (NAICR) 12 section 4pi-detector to detect gammas and 3074500100028 neutrons (Romashka) 3074500100029 (SIBAR) Detection of fission fragments 3074500100030 PART-DET (G,N,FF) 3074500100031 ERR-ANALYS (ERR-T) Total error including 3074500100032 (ERR-S) Statistical error (1.3%) 3074500100033 (ERR-SYS) Systematic error (1.6%) 3074500100034 HISTORY (19870414C) DG 3074500100035 (20060712A) Date format and reference corrected 3074500100036 (20130429U) On. REFERENCE: SJA and AE added. 3074500100037 (20131010A) On. EN-MIN/MAX moved to 002; BIB updated 3074500100038 ENDBIB 36 0 3074500100039 NOCOMMON 0 0 3074500100040 ENDSUBENT 39 0 3074500199999 SUBENT 30745002 20131010 31613074500200001 BIB 4 7 3074500200002 REACTION (92-U-235(N,ABS),,ALF,,AV) 3074500200003 COMMENT G.V.Muradyan (2011-10-03): 3074500200004 The 1986 and 1988 articles report the same experiment.3074500200005 0.1690+/-0.0035 is more mathematically exact. 3074500200006 STATUS (TABLE) Table 1 of Sov.Atom.Energ.65(1988)1022 3074500200007 HISTORY (20130429A) On. Values changed from 0.169 +/- 0.004 3074500200008 (20131010A) On. EN-MIN/MAX moved from 001 3074500200009 ENDBIB 7 0 3074500200010 NOCOMMON 0 0 3074500200011 DATA 6 1 3074500200012 EN-MIN EN-MAX DATA ERR-T ERR-S ERR-SYS 3074500200013 EV EV NO-DIM NO-DIM PER-CENT PER-CENT 3074500200014 0.016 0.030 0.1690 0.0035 1.3 1.6 3074500200015 ENDDATA 3 0 3074500200016 ENDSUBENT 15 0 3074500299999 ENDENTRY 2 0 3074599999999