ENTRY 41734 20210303 41944173400000001 SUBENT 41734001 20210303 41944173400100001 BIB 14 35 4173400100002 TITLE Yields of certain fragments in the fission of U235, 4173400100003 U238, and Pu239 by fission neutrons 4173400100004 AUTHOR (K.A.Petrzhak,G.M.Tolmachev,V.N.Ushatskii,M.A.Bak, 4173400100005 N.I.Blinova,S.S.Bugorkov,E.A.Moskal'kova,V.B.Osipova, 4173400100006 Yu.G.Petrov,A.V.Sorokina,L.P.Chernysheva,L.B.Shiryaeva)4173400100007 REFERENCE (B,NEJTRONFIZ,,217,1961) 4173400100008 (B,SPN,,159,1963) Engl. translation of NEUTRONFIZ,,217 4173400100009 (R,AEC-TR-4696,1961) 4173400100010 INSTITUTE (4RUSRI) 4173400100011 FACILITY (REAC,4RUSRI) Heavy water reactor of AS USSR. 4173400100012 INC-SOURCE A disc (81.8mm diameter, 2 mm thickness, 200 g weight)4173400100013 of 50% enriched in U-235, placed in thermal column. 4173400100014 INC-SPECT Neutrons produced at U-235 fission by thermal neutrons.4173400100015 SAMPLE . ~ 1 microgram, mass was determined by alpha-activity.4173400100016 Placed inside ionization chamber, served for fission 4173400100017 events counting. 4173400100018 . ~ 300 mg, mass was determined by weighting. 4173400100019 Placed outside ionization chamber. 4173400100020 DETECTOR (IOCH) For fission events registration. Working gas Ar.4173400100021 (D4PI) Beta activity was measured by a 4PI counter or b4173400100022 an end-window counter (window thickness 4173400100023 0.005+-0.001 mg/cm2). 4173400100024 METHOD (CHSEP) Irradiation time 10-20 hr, 4173400100025 cooling time usually < 1-1.5 half-life of isotope. 4173400100026 Yield of isotope was determined from 6-8 independent 4173400100027 measurements. 4173400100028 MONITOR Au-foil (8-10 mg/cm2) stacked to thick sample was 4173400100029 served as integral neutron flux, beta-activity of 4173400100030 Au-198 was measured by end-window counter. 4173400100031 ANALYSIS Number of fission events in thick sample was calculated4173400100032 by number of fissions in thin sample and mass ratio 4173400100033 for thick and thin samples. 4173400100034 CORRECTION For neutron flux difference in thin and thick samples 4173400100035 ~5%. 4173400100036 HISTORY (20210303C) M.M. 4173400100037 ENDBIB 35 0 4173400100038 NOCOMMON 0 0 4173400100039 ENDSUBENT 38 0 4173400199999 SUBENT 41734002 20210303 41944173400200001 BIB 5 13 4173400200002 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY,,FIS) 4173400200003 DECAY-DATA ((1.)38-SR-89,53.D,B) 4173400200004 ((2.)40-ZR-95,65.D,B) 4173400200005 ((3.)42-MO-99,67.HR,B) 4173400200006 ((4.)47-AG-111-G,7.6D,B) 4173400200007 ((5.)48-CD-115-G,2.33D,B) 4173400200008 ((6.)56-BA-140,12.8D,B) 4173400200009 COMMENT Of authors. Sr-89 and Zr-95 yields were determined 4173400200010 from relative measurements using known yield of Mo-99. 4173400200011 Other yields were determined in absolute measurements. 4173400200012 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4173400200013 article. 4173400200014 STATUS (TABLE) Table 1 of book Nejtronnaja Fizika,p.217,1961 4173400200015 ENDBIB 13 0 4173400200016 COMMON 1 3 4173400200017 EN-DUMMY 4173400200018 MEV 4173400200019 1. 4173400200020 ENDCOMMON 3 0 4173400200021 DATA 6 6 4173400200022 ELEMENT MASS ISOMER DATA DATA-ERR DECAY-FLAG 4173400200023 NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 4173400200024 38. 89. 5.6 0.4 1. 4173400200025 40. 95. 7.7 0.6 2. 4173400200026 42. 99. 6.4 0.4 3. 4173400200027 47. 111. 0.031 0.002 4. 4173400200028 48. 115. 0. 0.022 0.02 5. 4173400200029 56. 140. 6.0 0.5 6. 4173400200030 ENDDATA 8 0 4173400200031 ENDSUBENT 30 0 4173400299999 SUBENT 41734003 20210303 41944173400300001 BIB 6 20 4173400300002 REACTION (92-U-238(N,F)ELEM/MASS,CUM,FY,,FIS) 4173400300003 DECAY-DATA ((1.)38-SR-89,53.D,B) 4173400300004 ((2.)40-ZR-95,65.D,B) 4173400300005 ((3.)42-MO-99,67.HR,B) 4173400300006 ((4.)47-AG-111-G,7.6D,B) 4173400300007 ((5.)48-CD-115-G,2.33D,B) 4173400300008 ((6.)56-BA-140,12.8D,B) 4173400300009 COMMENT Of authors. 4173400300010 Sr-89, Zr-95, Ag-111, Cd-115 yields were determined 4173400300011 from relative measurements using known yield of Mo-99. 4173400300012 Other yields were determined in absolute measurements. 4173400300013 REL-REF (A,13379002,R.N.Keller+,J,PR,94,969,1954) Issue 4 4173400300014 Satisfactory agreement. 4173400300015 (A,,,B,RCS,3,(IV/9B),2003,1951) 4173400300016 Book 3, div.IV, vol.9, app.B, p.2003, 1951 yr. 4173400300017 Satisfactory agreement. 4173400300018 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4173400300019 article. 4173400300020 STATUS (TABLE) Tables 1,2 of book 4173400300021 Nejtronnaja Fizika,p.217,1961 4173400300022 ENDBIB 20 0 4173400300023 COMMON 1 3 4173400300024 EN-DUMMY 4173400300025 MEV 4173400300026 1. 4173400300027 ENDCOMMON 3 0 4173400300028 DATA 6 6 4173400300029 ELEMENT MASS ISOMER DATA DATA-ERR DECAY-FLAG 4173400300030 NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 4173400300031 38. 89. 3.7 0.3 1. 4173400300032 40. 95. 6.5 0.6 2. 4173400300033 42. 99. 6.6 0.4 3. 4173400300034 47. 111. 0.094 0.008 4. 4173400300035 48. 115. 0. 0.042 0.004 5. 4173400300036 56. 140. 6.7 0.5 6. 4173400300037 ENDDATA 8 0 4173400300038 ENDSUBENT 37 0 4173400399999 SUBENT 41734004 20210303 41944173400400001 BIB 5 13 4173400400002 REACTION (94-PU-239(N,F)ELEM/MASS,CUM,FY,,FIS) 4173400400003 DECAY-DATA ((1.)38-SR-89,53.D,B) 4173400400004 ((2.)40-ZR-95,65.D,B) 4173400400005 ((3.)42-MO-99,67.HR,B) 4173400400006 ((4.)47-AG-111-G,7.6D,B) 4173400400007 ((5.)48-CD-115-G,2.33D,B) 4173400400008 ((6.)56-BA-140,12.8D,B) 4173400400009 COMMENT Of authors. Sr-89 and Zr-95 yields were determined 4173400400010 from relative measurements using known yield of Mo-99. 4173400400011 Other yields were determined in absolute measurements. 4173400400012 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 4173400400013 article. 4173400400014 STATUS (TABLE) Table 1 of book Nejtronnaja Fizika,p.217,1961 4173400400015 ENDBIB 13 0 4173400400016 COMMON 1 3 4173400400017 EN-DUMMY 4173400400018 MEV 4173400400019 1. 4173400400020 ENDCOMMON 3 0 4173400400021 DATA 6 6 4173400400022 ELEMENT MASS ISOMER DATA DATA-ERR DECAY-FLAG 4173400400023 NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 4173400400024 38. 89. 1.8 0.2 1. 4173400400025 40. 95. 5.3 0.5 2. 4173400400026 42. 99. 5.5 0.4 3. 4173400400027 47. 111. 0.45 0.03 4. 4173400400028 48. 115. 0. 0.098 0.008 5. 4173400400029 56. 140. 4.9 0.4 6. 4173400400030 ENDDATA 8 0 4173400400031 ENDSUBENT 30 0 4173400499999 ENDENTRY 4 0 4173499999999