Heavy-element chemistry -Status and perspectivesA. Türler
Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland and Bern University, CH-3012 Bern, Switzerland email@example.com
(Received: 21 March 2002 / Published online: 31 October 2002)
In the past ten years, nuclear chemists have made considerable progress in developing fast on-line separation techniques, which allowed to chemically characterize the first four transactinide elements Rf (rutherfordium, Z=104), Db (dubnium, Z=105), Sg (seaborgium, Z=106), and recently also Bh (bohrium, Z=107). In all cases the isolated nuclides were unambiguously identified by observing genetically linked decay chains. Nuclides with production cross-sections of less than 100 pb and half-lives as short as a few seconds have been chemically isolated. Thus, chemists have discovered or significantly contributed to the characterization of the nuclear-decay properties of a number of transactinide nuclei. New techniques with greatly improved overall efficiencies should allow chemists to extend their studies to even heavier elements such as Hs (hassium, Z=108) and to the recently discovered superheavy elements with Z=112 and 114, which can be produced only with picobarn cross-sections.
27.90.+b - .
23.60.+e - Alpha decay.
© Società Italiana di Fisica, Springer-Verlag 2002