ENTRY 41646 20171210 41774164600000001 SUBENT 41646001 20171210 41774164600100001 BIB 9 24 4164600100002 TITLE Study of 244,246Fm isotopes spontaneous fission 4164600100003 energetic characteristics . 4164600100004 AUTHOR (D.D.Bogdanov,V.I.Vakatov,A.S.Voronin,M.P.Ivanov, 4164600100005 G.S.Popeko,A.M.Rodin,G.M.Ter-Akop'yan) 4164600100006 INSTITUTE (4ZZZDUB) 4164600100007 REFERENCE (R,JINR-P15-81-706,1981) Preprint. 4164600100008 REL-REF (R,,M.R.Schmorak,J,NDS,17,391,1976) Issue 3. Half-lives4164600100009 FACILITY (CYCLO,4ZZZDUB) Fm-244,-246 were synthesized by 4164600100010 irradiation of Pu-239 and U-233 targets of ~0.4 mg/cm2 4164600100011 thickness in C-12 ( 82 MeV) and O-16 ( 102 MeV) beams 4164600100012 of U-300 cyclotron. 4164600100013 METHOD (COINC) The coincidences between fission fragments. 4164600100014 Analogous-digital analyzer of 4095 time channels. 4164600100015 DETECTOR (IOCH) Ionization chambers of inside diameter 270mm, 4164600100016 200mm height, made from stainless steel, working gas wa4164600100017 methane at 3E+4 Pa pressure. 4164600100018 Energy calibration by fission fragments from U-235 4164600100019 thermal neutron fission and Au-197 and U-235 fission 4164600100020 initiated by C-12 and O-18 ions. 4164600100021 Average total energies for calibration reactions from 4164600100022 E.Haid,I.Perlman,G.Siborg, Yadernye Svoystva tyazhelykh4164600100023 metallov ( Nuclear Properties of heavy metals),is.5, 4164600100024 Nuclei fission, Atomizdat,Moscow,1969, page 260. 4164600100025 HISTORY (20171210C) M.M. 4164600100026 ENDBIB 24 0 4164600100027 NOCOMMON 0 0 4164600100028 ENDSUBENT 27 0 4164600199999 SUBENT 41646002 20171210 41774164600200001 BIB 6 9 4164600200002 REACTION (100-FM-244(0,F),PRE,AKE,LF+HF) 4164600200003 DECAY-DATA (100-FM-244,3.3MSEC) 4164600200004 2.4+-0.6 msec measured by decay curve. 4164600200005 REL-REF (A,,J.P.Unik+,C,73ROCH,2,19,1973) 201.6 MeV 4164600200006 Published at 1974. 4164600200007 CORRECTION For evaporated neutrons - 2.7 MeV. 4164600200008 ERR-ANALYS (DATA-ERR) Uncertainty of average kinetic energy, 4164600200009 defined by energy calibration. 4164600200010 STATUS (TABLE) Table of R,JINR-P15-81-706,1981 4164600200011 ENDBIB 9 0 4164600200012 NOCOMMON 0 0 4164600200013 DATA 2 1 4164600200014 DATA DATA-ERR 4164600200015 MEV PER-CENT 4164600200016 296.0 2. 4164600200017 ENDDATA 3 0 4164600200018 ENDSUBENT 17 0 4164600299999 SUBENT 41646003 20171210 41774164600300001 BIB 6 10 4164600300002 REACTION (100-FM-246(0,F),PRE,AKE,LF+HF) 4164600300003 DECAY-DATA (100-FM-246,1.1SEC) 4164600300004 Fm-246 HL was estimated > or = 0.7 sec in this work. 4164600300005 REL-REF (A,,D.Hoffman+,J,PR/C,22,1581,1980) Issue 4 199.1 MeV 4164600300006 (A,,J.P.Unik+,C,73ROCH,2,19,1973) 201.0 MeV 4164600300007 Published at 1974. 4164600300008 CORRECTION For evaporated neutrons - 2.7 MeV. 4164600300009 ERR-ANALYS (DATA-ERR) Uncertainty of average kinetic energy, 4164600300010 defined by energy calibration. 4164600300011 STATUS (TABLE) Table of R,JINR-P15-81-706,1981 4164600300012 ENDBIB 10 0 4164600300013 NOCOMMON 0 0 4164600300014 DATA 2 1 4164600300015 DATA DATA-ERR 4164600300016 MEV PER-CENT 4164600300017 296.0 2. 4164600300018 ENDDATA 3 0 4164600300019 ENDSUBENT 18 0 4164600399999 SUBENT 41646004 20171210 41774164600400001 BIB 4 6 4164600400002 REACTION ((100-FM-244(0,F),PRE,AP,HF)/ 4164600400003 (100-FM-244(0,F),PRE,AP,LF)) 4164600400004 Mass-asymmetry 4164600400005 DECAY-DATA (100-FM-244,3.3MSEC) 4164600400006 ERR-ANALYS (ERR-S) Statistical 4164600400007 STATUS (TABLE) Text, page 10 of R,JINR-P15-81-706,1981 4164600400008 ENDBIB 6 0 4164600400009 NOCOMMON 0 0 4164600400010 DATA 3 1 4164600400011 DATA +ERR-S -ERR-S 4164600400012 NO-DIM NO-DIM NO-DIM 4164600400013 1.25 0.35 0.15 4164600400014 ENDDATA 3 0 4164600400015 ENDSUBENT 14 0 4164600499999 SUBENT 41646005 20171210 41774164600500001 BIB 4 6 4164600500002 REACTION ((100-FM-246(0,F),PRE,AP,HF)/ 4164600500003 (100-FM-246(0,F),PRE,AP,LF)) 4164600500004 Mass-asymmetry 4164600500005 DECAY-DATA (100-FM-246,1.1SEC) 4164600500006 ERR-ANALYS (ERR-S) Statistical 4164600500007 STATUS (TABLE) Text, page 10 of R,JINR-P15-81-706,1981 4164600500008 ENDBIB 6 0 4164600500009 NOCOMMON 0 0 4164600500010 DATA 3 1 4164600500011 DATA +ERR-S -ERR-S 4164600500012 NO-DIM NO-DIM NO-DIM 4164600500013 1.25 0.35 0.15 4164600500014 ENDDATA 3 0 4164600500015 ENDSUBENT 14 0 4164600599999 SUBENT 41646006 20171210 41774164600600001 BIB 5 15 4164600600002 REACTION (100-FM-244(0,F),PR,NU) 4164600600003 DECAY-DATA (100-FM-244,3.3MSEC) 4164600600004 ANALYSIS Average number of prompt neutrons was derived from 4164600600005 measured total kinetic energy and average 4164600600006 mass-asymmetry using the total energy balance and 4164600600007 assuming that average neutron kinetic energy is 1.2MeV,4164600600008 fission gamma-quanta energy is 9 MeV 4164600600009 Mass defect and neutron binding energy from 4164600600010 N.Zeldes,A.Grill,A.Simievic,Shell-Model Semi-Empirical4164600600011 Nuclear Masses (II), Kobenhavn, 1967. 4164600600012 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4164600600013 article. 4164600600014 STATUS (TABLE) Text, page 10 of R,JINR-P15-81-706,1981 4164600600015 (DEP,41646002) TKE 4164600600016 (DEP,41646004) Average mass-asymmetry 4164600600017 ENDBIB 15 0 4164600600018 NOCOMMON 0 0 4164600600019 DATA 2 1 4164600600020 DATA DATA-ERR 4164600600021 PRT/FIS PRT/FIS 4164600600022 4.0 1.0 4164600600023 ENDDATA 3 0 4164600600024 ENDSUBENT 23 0 4164600699999 SUBENT 41646007 20171210 41774164600700001 BIB 5 15 4164600700002 REACTION (100-FM-246(0,F),PR,NU) 4164600700003 DECAY-DATA (100-FM-246,1.1SEC) 4164600700004 ANALYSIS Average number of prompt neutrons was derived from 4164600700005 measured total kinetic energy (TKE) and average 4164600700006 mass-asymmetry using the total energy balance and 4164600700007 assuming that average neutron kinetic energy is 1.2MeV,4164600700008 fission gamma-quanta energy is 9 MeV. 4164600700009 Mass defect and neutron binding energy from 4164600700010 N.Zeldes,A.Grill,A.Simievic,Shell-Model Semi-Empirical4164600700011 Nuclear Masses (II), Kobenhavn, 1967. 4164600700012 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4164600700013 article. 4164600700014 STATUS (TABLE) Text, page 10 of R,JINR-P15-81-706,1981 4164600700015 (DEP,41646003) TKE 4164600700016 (DEP,41646005) Average mass-asymmetry 4164600700017 ENDBIB 15 0 4164600700018 NOCOMMON 0 0 4164600700019 DATA 2 1 4164600700020 DATA DATA-ERR 4164600700021 PRT/FIS PRT/FIS 4164600700022 4.0 1.0 4164600700023 ENDDATA 3 0 4164600700024 ENDSUBENT 23 0 4164600799999 ENDENTRY 7 0 4164699999999