ENTRY 22047 20230302 231622047 0 1 SUBENT 22047001 20230302 231622047 1 1 BIB 15 42 22047 1 2 TITLE Half-lives, fission yields and neutron emission 22047 1 3 probabilities of 87Se and 88Se, and evidence for 87As 22047 1 4 AUTHOR (J.-V.Kratz,G.Herrmann) 22047 1 5 REFERENCE (J,JIN,32,3713,1970) 22047 1 6 REL-REF (N,23362001,H.D.Schuessler+,C,69VIENNA,,591,1969) 22047 1 7 Some prelim.results of group yields. 22047 1 8 (O,21273001,J.-V.Kratz+,C,73ROCH,2,95,1973) - new data 22047 1 9 of Se 22047 1 10 INSTITUTE (2GERMNZ) 22047 1 11 FACILITY (REAC,2GERMNZ) Mainz Triga reactor. Fast pneumatic tube22047 1 12 system. 22047 1 13 INC-SOURCE (REAC) Flashes of 0.1 sec duration and about 1.E+14 22047 1 14 neutrons/cm2 maximum flux. 22047 1 15 INC-SPECT Thermal neutron spectrum. 22047 1 16 METHOD (CHSEP) Chemical separation, using a rapid hydride- 22047 1 17 volatilization procedure, prior to neutron activity 22047 1 18 measurements. 5 sec duration . 22047 1 19 DETECTOR (PROPC) The neutron activities were measured with a 22047 1 20 shielded circular arrangement of eight He-3 counting 22047 1 21 tubes embedded in paraffin. The efficiency was about 22047 1 22 5% and the background 3 counts/min. 22047 1 23 (NAICR) 3 * 3 inch NaI(Tl) scintillator used for 22047 1 24 measuring the tracers Se-75 and As-76. 22047 1 25 (GELI) A 10 cm3 GeLi detector was used to control the 22047 1 26 purity of each selenium sample. 22047 1 27 SAMPLE 0.50 mg of U-235 dissolved in 0.1 ml of 0.1 n nitric 22047 1 28 acid, sealed in small glass capsules. 22047 1 29 CORRECTION No details given. 22047 1 30 ERR-ANALYS (DATA-ERR) No details given. 22047 1 31 ADD-RES Mass Most probable charge Charge dispersion parameter22047 1 32 87. 34.57+-0.07 0.57+-0.09 22047 1 33 88. 34.91+-0.08 0.58+-0.10 22047 1 34 from Table 3 of J.Inorg.Nucl.Chem.,32,3713,1970 22047 1 35 HISTORY (19871106C) N.O. 22047 1 36 (19871210E) 22047 1 37 (20170830A) M.M. Upper -> lower case correction. 22047 1 38 Dates were corrected for 4-digits year. 22047 1 39 Subents 005-007 were added. 22047 1 40 EN was moved from Subent 001 to Subents 002-004 . 22047 1 41 Subent 004 was deleted according to a comment of 22047 1 42 N.Otsuka ( NDS,IAEA), data were moved in ADD-RES. 22047 1 43 (20230302U) SD: Subent 002 updated. 22047 1 44 ENDBIB 42 0 22047 1 45 NOCOMMON 0 0 22047 1 46 ENDSUBENT 45 0 22047 199999 SUBENT 22047002 20230302 231622047 2 1 BIB 8 22 22047 2 2 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY,,FRC/SPA) 22047 2 3 ANALYSIS (DECAY) Half-lives determined from neutron decay-curves22047 2 4 in this work. 22047 2 5 Se isotopes cumulative yields were obtained by using 22047 2 6 estimated cumulative yields for Br-87 and Br-88. 22047 2 7 As-87 existence was found from a slight growth of 22047 2 8 Se-87 activity. 22047 2 9 DECAY-DATA ((1.)33-AS-87,0.6SEC) 0.6+-0.3 sec 22047 2 10 ((2.)34-SE-87,5.85SEC) 5.85+-0.15 sec 22047 2 11 ((3.)34-SE-88,1.4SEC) 1.4+-0.3 sec 22047 2 12 MONITOR (92-U-235(N,F)ELEM/MASS,CUM,FY,,FRC/SPA) 22047 2 13 DECAY-MON (35-BR-87,55.SEC) 22047 2 14 (35-BR-88,16.SEC) 22047 2 15 MONIT-REF (23362001,H.D.Schuessler+,C,69VIENNA,,591,1969) 22047 2 16 STATUS (TABLE) Text, pages 3717 (Se-87,88), 3718 (As-87) of 22047 2 17 J.Inorg.Nucl.Chem.,32,3713,1970 22047 2 18 (SPSDD,21273002) final data 22047 2 19 HISTORY (20170830A) M.M. HLs and its errors were moved in 22047 2 20 DECAY-DATA . 22047 2 21 (20230302A) SD:Reaction ratio (in REACTION and MONITOR)22047 2 22 was changed on reaction code with: SF8=SPA -> FRC/SPA. 22047 2 23 STATUS updated. 22047 2 24 ENDBIB 22 0 22047 2 25 COMMON 2 3 22047 2 26 EN-DUMMY ELEM-NRM 22047 2 27 EV NO-DIM 22047 2 28 2.5300E-02 35. 22047 2 29 ENDCOMMON 3 0 22047 2 30 DATA 6 3 22047 2 31 ELEMENT MASS DATA DATA-ERR DECAY-FLAG MONIT 22047 2 32 NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 22047 2 33 33. 87. 0.04 0.02 1. 22047 2 34 34. 87. 0.41 0.07 2. 0.95 22047 2 35 34. 88. 0.24 0.06 3. 0.85 22047 2 36 ENDDATA 5 0 22047 2 37 ENDSUBENT 36 0 22047 299999 SUBENT 22047003 20170830 226822047 3 1 BIB 5 9 22047 3 2 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY,,SPA) 22047 3 3 MONITOR (92-U-235(N,F)MASS,CHN,FY,,SPA) 22047 3 4 MONIT-REF (13065001,H.Farrar+,J,CJP,40,1017,1962) 22047 3 5 STATUS (TABLE) Table 2 and text, pages 3718 of 22047 3 6 J.Inorg.Nucl.Chem.,32,3713,1970 22047 3 7 Final data for 33-As-87 are in Subent 20521.003 22047 3 8 (DEP,22047002) Fractional cumulative yields. 22047 3 9 HISTORY (19871106C) N.O. 22047 3 10 (19871210E) 22047 3 11 ENDBIB 9 0 22047 3 12 COMMON 1 3 22047 3 13 EN-DUMMY 22047 3 14 EV 22047 3 15 2.5300E-02 22047 3 16 ENDCOMMON 3 0 22047 3 17 DATA 6 3 22047 3 18 ELEMENT MASS DATA DATA-ERR MONIT MONIT-ERR 22047 3 19 NO-DIM NO-DIM PC/FIS PC/FIS PC/FIS PC/FIS 22047 3 20 33. 87. 0.10 0.05 2.37 0.05 22047 3 21 34. 87. 0.97 0.16 2.37 0.05 22047 3 22 34. 88. 0.86 0.20 3.56 0.07 22047 3 23 ENDDATA 5 0 22047 3 24 ENDSUBENT 23 0 22047 399999 NOSUBENT 22047004 20170830 226822047 4 1 SUBENT 22047005 20170830 226822047 5 1 BIB 5 12 22047 5 2 REACTION (92-U-235(N,F)ELEM/MASS,DL/CUM,NU,,SPA) 22047 5 3 Delayed neutron yield for specific precursors 22047 5 4 ANALYSIS NU was calculated as cumulative fission yield 22047 5 5 multiplied by Pn. 22047 5 6 REL-REF (A,,P.del Marmol+,C,69VIENNA,,938,1969) 22047 5 7 (A,23353005,P.del Marmol+,J,JIN,32,705,1970) 22047 5 8 (0.15+-0.05)*10**-4 n/fis. 22047 5 9 STATUS (TABLE) Table 2 of J.Inorg.Nucl.Chem.,32,3713,1970 22047 5 10 (DEP,22047003) Cumulative yields 22047 5 11 (DEP,22047006) Pn for Se-87 22047 5 12 (DEP,22047007) Pn for Se-88 22047 5 13 HISTORY (20170830C) M.M. Subent was added. 22047 5 14 ENDBIB 12 0 22047 5 15 COMMON 1 3 22047 5 16 EN-DUMMY 22047 5 17 EV 22047 5 18 2.5300E-02 22047 5 19 ENDCOMMON 3 0 22047 5 20 DATA 4 2 22047 5 21 ELEMENT MASS DATA DATA-ERR 22047 5 22 NO-DIM NO-DIM PC/FIS PC/FIS 22047 5 23 34. 87. 0.24E-02 0.07E-02 22047 5 24 34. 88. 0.13E-02 0.08E-02 22047 5 25 ENDDATA 4 0 22047 5 26 ENDSUBENT 25 0 22047 599999 SUBENT 22047006 20170830 226822047 6 1 BIB 4 9 22047 6 2 REACTION (34-SE-87(0,B-)35-BR-87,,PN) 22047 6 3 REL-REF (A,,P.del Marmol+,C,69VIENNA,,938,1969) 22047 6 4 (A,23353004,P.del Marmol+,J,JIN,32,705,1970) 22047 6 5 0.23+-0.07 % 22047 6 6 (A,,L.Tomlinson,C,69VIENNA,,604,1969) 22047 6 7 0.2+-0.1 % 22047 6 8 STATUS (TABLE) Table 2 of J.Inorg.Nucl.Chem.,32,3713,1970 22047 6 9 Also in Abstract on page 3713. 22047 6 10 HISTORY (20170830C) M.M. Subent was added. 22047 6 11 ENDBIB 9 0 22047 6 12 NOCOMMON 0 0 22047 6 13 DATA 2 1 22047 6 14 DATA DATA-ERR 22047 6 15 NO-DIM NO-DIM 22047 6 16 0.0025 0.0006 22047 6 17 ENDDATA 3 0 22047 6 18 ENDSUBENT 17 0 22047 699999 SUBENT 22047007 20170830 226822047 7 1 BIB 5 16 22047 7 2 REACTION (34-SE-88(0,B-)35-BR-88,,PN) 22047 7 3 REL-REF (A,,P.del Marmol+,C,69VIENNA,,938,1969) 22047 7 4 (A,23353007,P.del Marmol+,J,JIN,32,705,1970) 22047 7 5 <1. % 22047 7 6 ANALYSIS Value 0.15+-0.09 % is finally obtained by authors ( see22047 7 7 page 3720 ) after analysis of two values: 22047 7 8 - 0.18+-0.10 % - based on Pn 4.0+-0.5 value for Br-88 22047 7 9 and activity ratio 0.39+-0.20 ( se88/Br88) ; 22047 7 10 - 0.15+-0.08 % - shotter interval to beginning of 22047 7 11 counting, i.e. 5.0 sec after irradiation was used; 22047 7 12 - possible interference from strong delayed-neutron 22047 7 13 precursors was estimated - total contamination < 12% 22047 7 14 was taken into account. 22047 7 15 STATUS (TABLE) Table 2 of J.Inorg.Nucl.Chem.,32,3713,1970 22047 7 16 Also in Abstract on page 3713. 22047 7 17 HISTORY (20170830C) M.M. Subent was added. 22047 7 18 ENDBIB 16 0 22047 7 19 NOCOMMON 0 0 22047 7 20 DATA 2 1 22047 7 21 DATA DATA-ERR 22047 7 22 NO-DIM NO-DIM 22047 7 23 0.0015 0.0009 22047 7 24 ENDDATA 3 0 22047 7 25 ENDSUBENT 24 0 22047 799999 ENDENTRY 7 0 2204799999999