ENTRY 40203 20180114 41774020300000001 SUBENT 40203001 20180114 41774020300100001 BIB 10 42 4020300100002 INSTITUTE (4ZZZDUB) 4020300100003 REFERENCE (J,SNP,18,371,1974) Eng.transl.of YF,18,(4),724,1973 4020300100004 (J,YF,18,(4),724,1973) Data from article 4020300100005 (R,JINR-P15-7119,1973) 4020300100006 Data tables. In Russian. 4020300100007 AUTHOR (M.Dakovskii,Yu.A.Lazarev,Yu.Ts.Oganesyan) 4020300100008 TITLE Prompt-neutron multiplicity in spontaneous fission. 4020300100009 METHOD (COINC) Neutron-fission fragments-coincidence. 4020300100010 Distributions of events in the number of recorded 4020300100011 neutron was obtained for Cm-246, Cm-244 and 4020300100012 for background. The total number of fission events were4020300100013 1.0E+5 for Cm-255, 1.3E+5 for Cm-246. 4020300100014 Data for Cm-244 obtained in previous measurement ( see 4020300100015 REL-REF of M.Dakovskii+, detection efficiency 48.2% ) 4020300100016 were also included in analysis. 4020300100017 REL-REF (M,40188001,M.Dakovskii+,J,YF,17,(4),692,1973) 4020300100018 DETECTOR (PROPC) 36 proportional He-3 neutron counters. 4020300100019 Detection efficiencies for Cm-244 and Cm-246 were 4020300100020 assumed equal. Statistics were collected for two values4020300100021 of neutron-detection efficiency- 39.9% and 44.4%. 4020300100022 (SIBAR) Silicon-gold surface-barrier detectors for 4020300100023 fission fragments. 4020300100024 PART-DET (N) Neutrons 4020300100025 (FF) fission fragments 4020300100026 CORRECTION Corrections were introduced on sample isotope 4020300100027 contents, the fragment discrimination threshold(<0.4%),4020300100028 the background (< 0.003 n/fis), the time resolution of 4020300100029 neutron counters ( <10%). 4020300100030 HISTORY (19740310C) Compiled at the centre 4020300100031 (19750210A) some corrections in subentries 002 and 0034020300100032 (20150109A) SD: Updated to new date formats,lower case.4020300100033 Ref. on Engl.transl. of YF added. Author's names 4020300100034 corrected (DAKOVSKIJ -> Dakovskii, LASAREV -> Lazarev,4020300100035 OGANESJAN -> Oganesyan) 4020300100036 (20150219A) M.M. Article was checked, BIB information 4020300100037 was updated in TITLE,AUTHOR,METHOD,DETECTOR,STATUS, 4020300100038 MONITOR. 4020300100039 Subent 002 was essentially corrected. 4020300100040 Subent 004 was added. 4020300100041 (20150506A) Subent 4 was corrected. 4020300100042 (20180114A) M.M. Ref. R,JINR-P15-7119 was added. 4020300100043 Monitor was added in COMMON of Subents 003-006. 4020300100044 ENDBIB 42 0 4020300100045 NOCOMMON 0 0 4020300100046 ENDSUBENT 45 0 4020300199999 SUBENT 40203002 20180114 41774020300200001 BIB 6 18 4020300200002 REACTION ((96-CM-246(0,F),PR,NU)/(96-CM-244(0,F),PR,NU)) 4020300200003 Primarily measured ratio. 4020300200004 SAMPLE Cm-244 sample with ~0.2 micrograms weight with 4020300200005 fissionable impurities contents up to 0.1%. 4020300200006 MONITOR Absolute measurement 4020300200007 ERR-ANALYS (DATA-ERR) Quoted error consists of statistical error 4020300200008 and systematical errors. Statistical error is reduced 4020300200009 using data of work Yadern. Fisika, 17,(4),692,7304. 4020300200010 STATUS (TABLE) Text, page 372 of J,SNP,18,371,1974 4020300200011 Text, p.7 of R,JINR-P15-7119,1973 4020300200012 HISTORY (20150109A) SD: units were changed NO-DIM -> PRT/FIS . 4020300200013 (20150219A) M.M. Reaction was corrected: 4020300200014 (96-CM-244(0,F),PR,NU) -> 4020300200015 (96-CM-246(0,F),PR,NU)/(96-CM-244(0,F),PR,NU) 4020300200016 Ratio data value was inserted ( 2.69+-0.01 is monitor 4020300200017 value for detection efficiency). 4020300200018 MISC data ( parameters of neutron distribution) were 4020300200019 moved in Subent 004. 4020300200020 ENDBIB 18 0 4020300200021 NOCOMMON 0 0 4020300200022 DATA 2 1 4020300200023 DATA DATA-ERR 4020300200024 NO-DIM NO-DIM 4020300200025 1.107 0.009 4020300200026 ENDDATA 3 0 4020300200027 ENDSUBENT 26 0 4020300299999 SUBENT 40203003 20180114 41774020300300001 BIB 8 24 4020300300002 REACTION (96-CM-246(0,F),PR,NU) 4020300300003 SAMPLE Cm-246 sample of ~0.8 micrograms weight, 4020300300004 98.6% of Cm-246 4020300300005 MONITOR (96-CM-244(0,F),PR,NU) The fission neutrons detection 4020300300006 efficiency was determined from known value 4020300300007 NU=2.69+-0.01 prt/fis for Cm-244 from: 4020300300008 MONIT-REF (,F.Manero+,R,INDC(NDS)-34/G,1971) 4020300300009 2.681+-0.011 - Tables 5,6 ( no pages numbers in hard 4020300300010 copy). 4020300300011 (40140002,L.I.Prokhorova+,J,AE,33,767,1972) Issue 3 4020300300012 2.70+-0.14 prt/fis. 4020300300013 REL-REF (D,,M.C.Thompson,J,PR/C,2,763,1970) 3.17+-0.22 4020300300014 (A,,L.I.Prokhorova+,J,AE,33,767,1972) 2.950+-0.015 4020300300015 (A,,V.V.Golushko+,J,AE,34,135,1973) 2.927+-0.027 4020300300016 ERR-ANALYS (DATA-ERR) Quoted error consists of statistical error 4020300300017 and systematical errors. 4020300300018 STATUS (TABLE) Table 1 of J,SNP,18,371,1974 4020300300019 Text, p.7 and Table 1 of R,JINR-P15-7119,1973 4020300300020 (DEP,40203002) In Subent 002 - directly measured ratio 4020300300021 of NU Cm-246 to NU Cm-244. 4020300300022 HISTORY (20150109A) SD: units changed NO-DIM -> PRT/FIS. 4020300300023 (20150219A) M.M. 4020300300024 MISC data ( parameters of neutron distribution) were 4020300300025 moved in Subent 004. 4020300300026 ENDBIB 24 0 4020300300027 NOCOMMON 0 0 4020300300028 DATA 4 1 4020300300029 DATA DATA-ERR MONIT MONIT-ERR 4020300300030 PRT/FIS PRT/FIS PRT/FIS PRT/FIS 4020300300031 2.98 0.03 2.69 0.01 4020300300032 ENDDATA 3 0 4020300300033 ENDSUBENT 32 0 4020300399999 SUBENT 40203004 20180114 41774020300400001 BIB 9 23 4020300400002 REACTION (96-CM-244(0,F),PR/NUM,NU) 4020300400003 SAMPLE Cm-244 sample with ~0.2 micrograms weight with 4020300400004 fissionable impurities contents up to 0.1%. 4020300400005 MONITOR (96-CM-244(0,F),PR,NU) The fission neutrons detection 4020300400006 efficiency was determined from known value 4020300400007 NU=2.69+-0.01 prt/fis for Cm-244 from: 4020300400008 MONIT-REF (,F.Manero+,R,INDC(NDS)-34/G,1971) 4020300400009 2.681+-0.011 - Tables 5,6 ( no pages numbers in hard 4020300400010 copy). 4020300400011 (40140002,L.I.Prokhorova+,J,AE,33,767,1972) Issue 3 4020300400012 2.70+-0.14 prt/fis. 4020300400013 ANALYSIS Method of statistical smoothing was used. 4020300400014 MISC-COL (MISC) Nu-dispersion for Cm-244 4020300400015 Sigma**2=-**2, in units (prt/fis)**2. 4020300400016 ERR-ANALYS (DATA-ERR) Quoted error consists of statistical error 4020300400017 and systematical errors. 4020300400018 STATUS (TABLE) Table 1 of J,SNP,18,371,1974 4020300400019 Table 1 of R,JINR-P15-7119,1973 4020300400020 (DEP,40188001) Data of 40188 were taken inot account in4020300400021 analysis . 4020300400022 HISTORY (20150109C) M.M. 4020300400023 (20150506A) Data for Cm-246 were moved in Subent 005. 4020300400024 (20180114A) 0.29 -> 0.029 for P0 . 4020300400025 ENDBIB 23 0 4020300400026 COMMON 4 3 4020300400027 MISC MISC-ERR MONIT MONIT-ERR 4020300400028 SEE TEXT SEE TEXT PRT/FIS PRT/FIS 4020300400029 1.28 0.02 2.69 0.01 4020300400030 ENDCOMMON 3 0 4020300400031 DATA 3 8 4020300400032 PART-OUT DATA DATA-ERR 4020300400033 NO-DIM NO-DIM NO-DIM 4020300400034 0. 0.029 0.004 4020300400035 1. 0.098 0.012 4020300400036 2. 0.314 0.017 4020300400037 3. 0.330 0.017 4020300400038 4. 0.175 0.015 4020300400039 5. 0.052 0.014 4020300400040 6. 0.002 0.013 4020300400041 7. 0.000 0.007 4020300400042 ENDDATA 10 0 4020300400043 ENDSUBENT 42 0 4020300499999 SUBENT 40203005 20180114 41774020300500001 BIB 9 21 4020300500002 REACTION (96-CM-246(0,F),PR/NUM,NU) 4020300500003 SAMPLE Cm-244 sample with ~0.2 micrograms weight with 4020300500004 fissionable impurities contents up to 0.1%. 4020300500005 Cm-246 sample of ~0.8 micrograms weight, 4020300500006 98.6% of Cm-246 4020300500007 MONITOR (96-CM-244(0,F),PR,NU) The fission neutrons detection 4020300500008 efficiency was determined from known value 4020300500009 NU=2.69+-0.01 prt/fis for Cm-244 from: 4020300500010 MONIT-REF (,F.Manero+,R,INDC(NDS)-34/G,1971) 4020300500011 2.681+-0.011 - Tables 5,6 ( no pages numbers in hard 4020300500012 copy). 4020300500013 (40140002,L.I.Prokhorova+,J,AE,33,767,1972) Issue 3 4020300500014 2.70+-0.14 prt/fis. 4020300500015 ANALYSIS Method of statistical smoothing was used. 4020300500016 MISC-COL (MISC) Nu-dispersion for Cm-246 4020300500017 Sigma**2=-**2, in units (prt/fis)**2. 4020300500018 ERR-ANALYS (DATA-ERR) Quoted error consists of statistical error 4020300500019 and systematical errors. 4020300500020 STATUS (TABLE) Table 1 of J,SNP,18,371,1974 4020300500021 Table 1 of R,JINR-P15-7119,1973 4020300500022 HISTORY (20150506C) Data for Cm-246 were moved from Subent 004.4020300500023 ENDBIB 21 0 4020300500024 COMMON 4 3 4020300500025 MISC MISC-ERR MONIT MONIT-ERR 4020300500026 SEE TEXT SEE TEXT PRT/FIS PRT/FIS 4020300500027 1.31 0.02 2.69 0.01 4020300500028 ENDCOMMON 3 0 4020300500029 DATA 3 8 4020300500030 PART-OUT DATA DATA-ERR 4020300500031 NO-DIM NO-DIM NO-DIM 4020300500032 0. 0.016 0.005 4020300500033 1. 0.060 0.014 4020300500034 2. 0.264 0.020 4020300500035 3. 0.341 0.020 4020300500036 4. 0.219 0.020 4020300500037 5. 0.094 0.020 4020300500038 6. 0.006 0.010 4020300500039 7. 0.000 0.012 4020300500040 ENDDATA 10 0 4020300500041 ENDSUBENT 40 0 4020300599999 ENDENTRY 5 0 4020399999999