James, L.O. Morgan and Albert Ghiorso isolate americium, named after America. 1944... Glen T. Seaborg , R.A. James and Albert Ghiorso isolate curium, named after Marie and Pierre Curie . 1949... S.G. Thompson, Albert Ghiorso and Glen T. Seaborg isolate berkelium, named after the place of its discovery, Berkeley, California. 1950...