Author/Authors :
Stavsetra، نويسنده , , L. and Gregorich، نويسنده , , K.E. and Alstad، نويسنده , , J. and Breivik، نويسنده , , H. and Eberhardt، نويسنده , , K. and Folden III، نويسنده , , C.M and Ginter، نويسنده , , T.N. and Johansson، نويسنده , , M. and Kirbach، نويسنده , , U.W. and Lee، نويسنده , , D.M. and Mendel، نويسنده , , M. and Omtvedt، نويسنده , , L.A. and Patin، نويسنده , , J.B. and Skarnemark، نويسنده , , G. and Sudowe، نويسنده , , R. a، نويسنده ,
Abstract :
The fast liquid–liquid extraction system SISAK with continuous liquid scintillation detection was coupled to the Berkeley Gas-filled Separator to enable studies of the chemical properties of α -decaying transactinide elements. The preseparated transactinide 257Rf (4.7 s), was transported via a He/KCl-jet directly into the scintillation solution. This permitted the first unambiguous detection of transactinide atoms by the means of the α -liquid scintillation detectors of the SISAK-system. During the experiment, 89 257Rf atoms were observed. The type of events observed correspond well with the expectations based on half-lives, decay branches and transport- and hold-up times. The successful result of this experiment demonstrates that the system is well fitted for count-rates of 1–2 atoms/h and half-lives of a few seconds.
