ENTRY 40265 20210830 42024026500000001 SUBENT 40265001 20210830 42024026500100001 BIB 13 33 4026500100002 TITLE Measurement of average prompt neutron number 4026500100003 for Pu-239 in energy range 0.01-40 eV 4026500100004 AUTHOR (V.P.Bolotskiy,K.G.Ignat'ev,S.P.Borovlev, 4026500100005 M.V.Polozov,S.I.Sukhoruchkin) 4026500100006 REFERENCE (C,73KIEV,4,70,1973) Data are given 4026500100007 INSTITUTE (4RUSKUR) 4026500100008 FACILITY (CYCLO,4RUSITE) 4026500100009 SAMPLE Metal, 10 x 10 cm size, 2.2E-3 at/b thickness. 4026500100010 METHOD (COINC) Coincidence method between fission neutrons 4026500100011 and prompt gamma rays and capture gamma rays. 4026500100012 (TOF) Time-of-flight method for determination 4026500100013 of neutron energy. Flight base = 9.2 m. 4026500100014 (PSD) Neutron and gamma rays pulses were separated by 4026500100015 shape. 4026500100016 DETECTOR (SCIN) Four detectors on the base of stilbene 4026500100017 crystals (67 x 7 cm) were used for counting 4026500100018 of fission neutrons. No information 4026500100019 about detector for measurement 4026500100020 of fission fragments. 4026500100021 ANALYSIS Value of nu for Pu-239 was measured as regards 4026500100022 nu for pu-239 at thermal neutrons. 4026500100023 MONITOR Normalized to NU for PU-239 in energy range 0.02-0.04eV4026500100024 PART-DET (PN,G) 4026500100025 CORRECTION For determination of relative value of NU 4026500100026 following corrections were taken into account 4026500100027 1. correction on accidental coincidence and 4026500100028 dead time of experimental setup, 4026500100029 2. dependence of efficiency of registration 4026500100030 for neutron detector from neutron energy 4026500100031 HISTORY (19750228C) 4026500100032 (20210831A) M.M. correction for current rules and 4026500100033 dictionaries. REAC -> CYCLO. PSD was added. 4026500100034 PART-DET (FF) was deleted. 4026500100035 ENDBIB 33 0 4026500100036 NOCOMMON 0 0 4026500100037 ENDSUBENT 36 0 4026500199999 SUBENT 40265002 20210830 42024026500200001 BIB 5 13 4026500200002 REACTION ((94-PU-239(N,F),PR,NU)//(94-PU-239(N,F),PR,NU)) 4026500200003 COMMENT Of authors. Nu in the thermal energy range and at 4026500200004 0.3 eV resonance ( and also probaly at resonances of 4026500200005 energy up to 40 eV) is constant in average with 4026500200006 accuracy 1.%. 4026500200007 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4026500200008 article. 4026500200009 STATUS (TABLE) Table on page 74 of 4026500200010 Conf.Proc.73KIEV,v.4,p.70,1973 4026500200011 HISTORY (20210830A) Reaction was corrected: REL -> ratio, 4026500200012 EN-MIN/MAX -> EN-MIN/MAX-NM, EN-MIN/MAX-DN were added.4026500200013 DATA and DATA-ERR were corrected as given in Table of 4026500200014 the article. ARB-UNITS -> NO-DIM 4026500200015 ENDBIB 13 0 4026500200016 COMMON 2 3 4026500200017 EN-MIN-DN EN-MAX-DN 4026500200018 EV EV 4026500200019 0.02 0.04 4026500200020 ENDCOMMON 3 0 4026500200021 DATA 4 6 4026500200022 EN-MIN-NM EN-MAX-NM DATA DATA-ERR 4026500200023 EV EV NO-DIM NO-DIM 4026500200024 0.01 0.02 1.018 0.013 4026500200025 0.04 0.05 0.990 0.010 4026500200026 0.13 0.21 0.990 0.011 4026500200027 0.3 0.3 0.990 0.011 4026500200028 1. 7. 1.011 0.030 4026500200029 7. 40. 0.992 0.021 4026500200030 ENDDATA 8 0 4026500200031 ENDSUBENT 30 0 4026500299999 ENDENTRY 2 0 4026599999999