Please refer to your system administrator. Notes Transuranium elements such as seaborgium can be created artificially in particle accelerators.
Isotopes of seaborgium have short half-lives of less than a second.
Experiments at the same American institution confirmed the discovery in 1993. The Russian experiments involved the bombardment of lead isotopes with high energy 54 Cr ions while the American results followed the collision of 18 O ions with 249 Cf ions.