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  • 1 Chalmers University of Technology Department of Nuclear Chemistry S-412 96 Göteborg Sweden
  • | 2 University of Oslo Department of Chemistry N-0315 Oslo Norway
  • | 3 Universität Mainz Institut für Kernchemie D-55099 Mainz Germany
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Abstract  

Fast solvent extraction is a chemical separation method, which can be applied to study exotic nuclides. Since about 1970 the SISAK technique, which is an on-line method based on multi-stage solvent extraction separations, has been successfully used to investigate the nuclear properties of β-decaying nuclides with half-lives down to about one second. During the last decade it has become possible to produce transactinide elements in high enough yields to investigate their chemical properties on a one-atom-at-a-time scale. For this purpose it was necessary to improve and change the detection part of the SISAK system in order to be capable to detect spontaneously fissioning and α-decaying nuclides in a flowing organic solution. This technique is based on liquid scintillation counting with pulse-shape discrimination and pile-up rejection