ENTRY 40898 20180129 41774089800000001 SUBENT 40898001 20180129 41774089800100001 BIB 10 21 4089800100002 TITLE Cross-section of the Np-237(n,2n)Np-236(22.5hr) 4089800100003 reaction caused by Cf-252 spontaneous fission neutrons 4089800100004 AUTHOR (E.A.Gromova,S.S.Kovalenko,Yu.A.Nemilov, 4089800100005 Yu.A.Selitskii,B.I.Tarler,V.B.Funshtein,V.A.Yakovlev) 4089800100006 INSTITUTE (4RUSRI) 4089800100007 REFERENCE (J,SJA,60,95,1986) 4089800100008 (J,AE,60,68,1986) is. 1. 4089800100009 MONITOR Relative measurements 4089800100010 METHOD (ACTIV) 161 day irradiation 4089800100011 DETECTOR (GELI) 4089800100012 INC-SOURCE (CF252) 50 microgram Cf-252 4089800100013 INC-SPECT Neutron fission spectrum of Cf252 4089800100014 Neutron flux was determined by threshold reactions 4089800100015 Ti-48(n,p), Ni-58(n,p), Al-27(n,p), Al-27(n,a) and 4089800100016 Au-197(n,2n). Results agree in the limit of exper. 4089800100017 error - 7% . 4089800100018 HISTORY (19860821C) Compiled at CJD 4089800100019 (20180123A) M.M. Upper -> lower case correction. 4089800100020 Dates were corrected for 4-digits year. 4089800100021 Ref. SJA,60,95,1986 was added. 4089800100022 BIB information was updated. 4089800100023 ENDBIB 21 0 4089800100024 COMMON 1 3 4089800100025 EN-DUMMY 4089800100026 MEV 4089800100027 1.5 4089800100028 ENDCOMMON 3 0 4089800100029 ENDSUBENT 28 0 4089800199999 SUBENT 40898002 20180129 41774089800200001 BIB 6 22 4089800200002 REACTION (93-NP-237(N,2N)93-NP-236-M,,SIG,,FIS) 4089800200003 DECAY-DATA (93-NP-236-M,22.5HR,B-,,0.48) 0.48+-0.01 4089800200004 (93-NP-237,2.14E+6YR,A) (2.14+-0.01)*10**6 yr. 4089800200005 (94-PU-239,,A) 4089800200006 (94-PU-236,,A) 4089800200007 ANALYSIS Alpha radiation intensities ratio of Pu-236 to Pu-239 4089800200008 was used to determine CS - see formula (1) in 4089800200009 J,SJA,60,95,1986 . 4089800200010 SAMPLE Neptunium-oxide Np-02 pressurized in the thin-wall 4089800200011 steel container, sample weight is 0.5 gram 4089800200012 ERR-ANALYS (ERR-1) Error of Pu-239 activity 4089800200013 (ERR-2) Error of the ratio of alpha-activities 4089800200014 of Pu-236 and Pu-239 4089800200015 (ERR-3) Error of the Np-237 number of atoms 4089800200016 (ERR-4) Error of the decay-constant of Pu-236 4089800200017 (ERR-5) Error of the probability of Np-236-M decay 4089800200018 (ERR-6) Error of the neutron flux determination and 4089800200019 error caused by the sample inhomogeneity 4089800200020 (ERR-7) Error caused by the Cf-252 and Pu-236 decay 4089800200021 constants uncertainty 4089800200022 (ERR-T) Total error 4089800200023 STATUS (TABLE) Text, page 97 of J,SJA,60,95,1986 4089800200024 ENDBIB 22 0 4089800200025 NOCOMMON 0 0 4089800200026 DATA 10 1 4089800200027 DATA ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 4089800200028 ERR-6 ERR-7 ERR-T ERR-T 4089800200029 MB PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 4089800200030 PER-CENT PER-CENT PER-CENT MB 4089800200031 4.66 2. 3. 0.8 0.3 2. 4089800200032 8. 1. 10. 0.47 4089800200033 ENDDATA 6 0 4089800200034 ENDSUBENT 33 0 4089800299999 ENDENTRY 2 0 4089899999999