ENTRY 40674 20160602 41764067400000001 SUBENT 40674001 20160602 41764067400100001 BIB 10 34 4067400100002 INSTITUTE (4RUSKUR) 4067400100003 REFERENCE (J,SJA,55,528,1983) Engl.transl.of J,AE,55,97,1983 4067400100004 #doi:10.1007/BF01138346 4067400100005 (J,AE,55,(2),97,198308) 4067400100006 AUTHOR (S.N.Belen'kii,M.D.Skorokhvatov,A.V.Etenko) 4067400100007 TITLE Measurement of the characteristics of spontaneous 4067400100008 fission of U-238 and U-236 4067400100009 SAMPLE Small grainy powder of U(3)O(8) 4067400100010 DETECTOR (PROPC) Filled by He3 and placed in hydrogenous 4067400100011 moderator. 24 counters. 4067400100012 Detector efficiency was measured by Cf-252 source to be4067400100013 0.490+-0.003, for U - it was multiplied by coefficient 4067400100014 1.032+-0.005 to take into account difference of prompt 4067400100015 neutron spectra. 4067400100016 ANALYSIS Multiplicity for n=1 was not used in analysis of 4067400100017 distribution due to uncertainty in yields of (alpha,n) 4067400100018 reaction and delayed neutrons. Data For samples with 4067400100019 square > or = 87.5 cm**2 were used in analysis. 4067400100020 Extrapolation to zero thickness was done. 4067400100021 MONITOR No information. 4067400100022 ERR-ANALYS (DATA-ERR) Not specified. 4067400100023 HISTORY (19840322C) 4067400100024 (20130802A) M.M. Upper -> lower case correction. 4067400100025 Dates were corrected for 4-digits year. 4067400100026 INC-SOURCE line was deleted (spontaneous fission). 4067400100027 BIB information was updated. 4067400100028 Ref. of Engl.translation was added. 4067400100029 Units of DATA were changed NO-DIM -> PRT/FIS. 4067400100030 PR was added in SF4 in REACTION. 4067400100031 Subent 004 was added. 4067400100032 (20160602U) SD: DECAY-DATA Corrected following 4067400100033 MEMO CP-D/888. 4067400100034 (20170710U) M.M. Previous correction of SD was 4067400100035 checked at CJD. 4067400100036 ENDBIB 34 0 4067400100037 NOCOMMON 0 0 4067400100038 ENDSUBENT 37 0 4067400199999 SUBENT 40674002 20160602 41764067400200001 BIB 8 16 4067400200002 REACTION (92-U-238(0,F),PR,NU) 4067400200003 Average prompt neutron multiplicity. 4067400200004 SAMPLE Mass of U-238 sample- 32.gramm 4067400200005 Isotopic content: U-234 - 0.0003%, U-235 - 0.0003%, 4067400200006 U-236 - 0.0003%, U-238 - 99.9999 % . 4067400200007 COMMENT Of compiler M.M. Sum of isotopic content given in 4067400200008 Table 1 of J,AE,55,(2),97,1983 is 100.0008%. 4067400200009 DECAY-DATA U-238: (8.2+-0.2) x 10**15 yr spont.fission (value 4067400200010 from p.23 of A. Nichols+,INDC(NDS)-I05/N,15(1979)). 4067400200011 MISC-COL (MISC) Dispersion on neutron multiplicity distribution 4067400200012 sig**2. 4067400200013 CORRECTION For backgrounds. 4067400200014 For counting loses. 4067400200015 STATUS (TABLE) Text, page 99, of J,AE,55,(2),97,1983 . 4067400200016 HISTORY (20160602U) SD: DECAY-DATA corrected following 4067400200017 MEMO CP-D/888. 4067400200018 ENDBIB 16 0 4067400200019 NOCOMMON 0 0 4067400200020 DATA 4 1 4067400200021 DATA DATA-ERR MISC MISC-ERR 4067400200022 PRT/FIS PRT/FIS SEE TEXT SEE TEXT 4067400200023 1.97 0.1 1.03 0.08 4067400200024 ENDDATA 3 0 4067400200025 ENDSUBENT 24 0 4067400299999 SUBENT 40674003 20160602 41764067400300001 BIB 7 16 4067400300002 REACTION (92-U-236(0,F),PR,NU) 4067400300003 Average prompt neutron multiplicity. 4067400300004 SAMPLE Mass of U-236 sample -53.gramm 4067400300005 Isotopic content: U-234 - 0.001%, U-235 - 0.047%, 4067400300006 U-236 - 99.845%, U-238 - 0.107 % . 4067400300007 DECAY-DATA U-236: (2.7+-0.4)*10**16 yr agrees with 4067400300008 (2.43+-0.13) x 10**16 yr spont.fission (value 40674 4067400300009 from H.Von Gunten+, Phys. Rev.,C23,1110(1981)). 4067400300010 MISC-COL (MISC) Dispersion on neutron multiplicity distribution 4067400300011 sig**2. 4067400300012 CORRECTION For backgrounds. 4067400300013 For counting loses. 4067400300014 STATUS (TABLE) Text, page 99, of J,AE,55,(2),97,1983 . 4067400300015 HISTORY (20160602U) SD: DECAY-DATA corrected following 4067400300016 MEMO CP-D/888. 4067400300017 (20170710U) M.M. (2.7+-0.4)*10**16 yr was added as used4067400300018 ENDBIB 16 0 4067400300019 NOCOMMON 0 0 4067400300020 DATA 4 1 4067400300021 DATA DATA-ERR MISC MISC-ERR 4067400300022 PRT/FIS PRT/FIS SEE TEXT SEE TEXT 4067400300023 1.79 0.18 1.02 0.12 4067400300024 ENDDATA 3 0 4067400300025 ENDSUBENT 24 0 4067400399999 SUBENT 40674004 20130802 41614067400400001 BIB 5 13 4067400400002 REACTION (92-U-238(0,F),PR/NUM,NU,,RAW) 4067400400003 Neutron multiplicity distributions for 3 samples of 4067400400004 U-238 of mass 1 g on different squares during 10**4 sec4067400400005 counting. Number of counts, not normalized. 4067400400006 SAMPLE Mass of U-238 sample- 32.gramm 4067400400007 Isotopic content: U-234 - 0.0003%, U-235 - 0.0003%, 4067400400008 U-236 - 0.0003%, U-238 - 99.9999 % . 4067400400009 COMMENT Of compiler M.M. Sum of isotopic content given in 4067400400010 Table 1 of J,AE,55,(2),97,1983 is 100.0008%. 4067400400011 Of authors. For S=19.5 cm**2 - there are higher values 4067400400012 for n=5, 6. 4067400400013 MISC-COL (MISC) Sample square in cm**2 . 4067400400014 STATUS (TABLE) Table 2 of J,AE,55,(2),97,1983 . 4067400400015 ENDBIB 13 0 4067400400016 NOCOMMON 0 0 4067400400017 DATA 4 15 4067400400018 PART-OUT DATA DATA-ERR MISC 4067400400019 NO-DIM ARB-UNITS ARB-UNITS SEE TEXT 4067400400020 2. 14.4 0.2 19.6 4067400400021 2. 14.1 0.2 87.5 4067400400022 2. 14.2 0.2 437.5 4067400400023 3. 3.1 0.1 19.6 4067400400024 3. 3.2 0.1 87.5 4067400400025 3. 3.1 0.1 437.5 4067400400026 4. 0.39 0.05 19.6 4067400400027 4. 0.37 0.07 87.5 4067400400028 4. 0.32 0.05 437.5 4067400400029 5. 0.06 0.02 19.6 4067400400030 5. 0.01 0.02 87.5 4067400400031 5. 0.015 0.02 437.5 4067400400032 6. 0.02 0.01 19.6 4067400400033 6. 0.00 0.01 87.5 4067400400034 6. 0.00 0.01 437.5 4067400400035 ENDDATA 17 0 4067400400036 ENDSUBENT 35 0 4067400499999 ENDENTRY 4 0 4067499999999