Physico-chemical characterization of seaborgium as oxide hydroxide

Abstract

Seaborgium (Sg; element 106) was studied in comparison with tungsten in the O 2 -H 2 O (g) /SiO 2(s) -system using high temperature on-line isothermal gas chromatography. The 21-s nuclide 266 Sg was produced in the 248 Cm+ 22 Ne reaction at a beam energy of 119 MeV. The reaction products were continuously transported by a He(MoO 3 )-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. 266 Sg was unambiguously detected after gas chromatographic separation by measuring 266 Sg- 262 Rf 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.