ENTRY 23572 20200505 22872357200000001 SUBENT 23572001 20200505 22872357200100001 BIB 10 20 2357200100002 TITLE Measurements on radioactive krypton isotopes from 2357200100003 fission after mass-spectrographic separation 2357200100004 AUTHOR (J.Koch, O.Kofoed-Hansen,P.Kristensen, W.Drost-Hansen) 2357200100005 REFERENCE (J,PR,76,279,1949) 2357200100006 INSTITUTE (2DENCOP) 2357200100007 FACILITY (CYCLO,2DENCOP) 2357200100008 INC-SOURCE (D-BE) 2357200100009 SAMPLE Ten kg of uranium oxide powder , mixed with a small 2357200100010 portion of ammonium carbonate, placed in a glass 2357200100011 container, surrounded by a few cm of paraffin. 2357200100012 Container was inserted as close as possible to 2357200100013 neutron source. Irradiation time ~3 hr. 2357200100014 METHOD (CHSEP,ASEP) Inert gases from U were pumped off by a 2357200100015 Toepler pump, using the gas given off by the ammonium 2357200100016 carbonate (NH(3), CO(2), H(2)O) as carrier of activity.2357200100017 Isotopes separation was started in mass-spectrograph 2357200100018 ~1/2 hr after stopping of cyclotron. 2357200100019 Mass-spectrograph run time ~1 hr. 2357200100020 ANALYSIS (DECAY) Formulas 1, 2 were used. 2357200100021 HISTORY (20200415C) M.M. 2357200100022 ENDBIB 20 0 2357200100023 NOCOMMON 0 0 2357200100024 ENDSUBENT 23 0 2357200199999 SUBENT 23572002 20200505 22872357200200001 BIB 6 17 2357200200002 REACTION ((92-U-0(N,F)ELEM/MASS,CUM,FY,,SPA)/ 2357200200003 (92-U-0(N,F)36-KR-88,CUM,FY,,SPA)) 2357200200004 DECAY-DATA (36-KR-88,2.77HR) 2357200200005 (36-KR-87,1.30HR,B,3200.) 2357200200006 Max.energy 3.2+-0.3 MeV, measured. 2357200200007 (36-KR-85-M,4.36HR,B,750.) 2357200200008 Max energy 0.75+-0.1 MeV, measured. 2357200200009 Measured HL with accuracy ~2%. 2357200200010 ANALYSIS Average for two series of measurements. 2357200200011 Contribution of ling-lived Kr-85 was neglected. 2357200200012 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 2357200200013 article. 2357200200014 STATUS (TABLE) Table II of Physical Review,v.76,p.279,1949 2357200200015 COMMENT Of compiler. In the article there is no information 2357200200016 about incident neutron energy, about energy of 2357200200017 deuterons at cyclotron. EN-DUMMY was supposed by 2357200200018 compiler as 1.MeV. 2357200200019 ENDBIB 17 0 2357200200020 COMMON 2 3 2357200200021 EN-DUMMY ELEMENT 2357200200022 MEV NO-DIM 2357200200023 1. 36. 2357200200024 ENDCOMMON 3 0 2357200200025 DATA 4 2 2357200200026 MASS ISOMER DATA DATA-ERR 2357200200027 NO-DIM NO-DIM NO-DIM NO-DIM 2357200200028 87. 0.70 0.15 2357200200029 85. 1. 0.33 0.10 2357200200030 ENDDATA 4 0 2357200200031 ENDSUBENT 30 0 2357200299999 ENDENTRY 2 0 2357299999999