[en] For the first time the chemical properties of element 106 (Sg = seaborgium) were successfully studied using the On-line Gas Chromatography Apparatus (OLGA III). Under conditions optimized with carrier-free activities of the lighter homologues Mo and W, the nuclides ²⁶⁵Sg and ²⁶⁶Sg were identified after the chemical separation of seaborgium oxichlorides. In addition, the half-lives of ²⁶⁵Sg and ²⁶⁶Sg were measured for the first time. (author) 1 tab

[en] A team of German physicists have studied several nuclei of seaborgium (Z=106). By trapping 7 nuclei they had 34 seconds to lead their investigations. It appears that the seaborgium has a chemical behaviour consistent with the Mendeleev table. (A.C.)

[en] The chemical identification of element 106 was accomplished for the first time. The nuclide ²⁶³106 was registered in the form of its (oxy)chlorides through its s.f. events. 4 refs

[en] Fast chemical separation methods having recently been developed for transactinide elements, it has been possible to study neutron-rich nuclides of longer half-life, and in particular the chemical behaviour of element 106, seaborgium. The report explains the online methods applied, as for instance extraction in a scintillator and measurements with pulse shape discrimination and parent-daughter correlation. (DG)

No abstract available

[en] Seaborgium (Sg; element 106) was studied in comparison with tungsten in the O₂-H₂O_(g)/SiO_2(s)-system using high temperature on-line isothermal gas chromatography. The 21-s nuclide ²⁶⁶Sg was produced in the ²⁴⁸Cm + ²²Ne reaction at a beam energy of 119 MeV. The reaction products were continuously transported by a He(MoO₃)-jet to the chromatography apparatus HITGAS. Group 6 element oxide hydroxide molecules volatile at temperatures above 1000 K were formed at 1325 K by adding humid oxygen as reactive gas. ²⁶⁶Sg was unambiguously detected after gas chromatographic separation by measuring ²⁶⁶Sg-²⁶²Rf mother-daughter α-sf correlations. The experimental results demonstrate the volatility of Sg in humid oxygen, presumably as Sg oxide hydroxide, a behavior typical for both U(VI) and the group 6 elements. (orig.)

[en] 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. (orig.)

[en] The recently discovered nuclide ²⁶⁶106 with N = 160 shows that the prediction of increased stability against spontaneous fission near N = 162 and Z = 108 is correct. The authors report the recent experimental results and the plans to map out this new region of stability from Z = 106 to 110 with neutron numbers from 158 to as high as 164

[en] The following topics were covered: chemical and physical properties of the elements Ruherfordium and Seaborgium, structure of Sg-fluoride complexes, nuclear properties of ²⁶⁶Sg and ²⁶²Rf, excitation functions of the reaction ²⁴⁸Cm(²²Ne,4n)²⁶⁶Sg

[en] The chemical properties of SgO₂Cl₂ (element 106 = Seaborgium, Sg) were successfully studied using the On-line Gas Chromatography Apparatus (OLGA III). After chemical separation of Sg the nuclides ²⁶⁵Sg and ²⁶⁶Sg were unambiguously identified and their half-lives were determined for the first time. The Sg nuclides were produced from the ²⁴⁸Cm(²²Ne,4,5n)^266,265Sg reaction at the GSI Darmstadt UNILAC accelerator. Simultaneously, short-lived W nuclides were produced from a small admixture of ¹⁵²Gd to the Cm target material. As predicted by relativistic calculations and by extrapolations of chemical properties, it was demonstrated that Sg oxychlorides are indeed less volatile than their lighter homologue Mo- and equally or less volatile than W-oxychlorides. (author) 1 fig., 1 tab., 4 refs