Resonance ionization spectroscopy in a buffer gas cell with radioactive decay detection, demonstrated using Tl208RemoveW. Lauth, H. Backe, M. Dahlinger, I. Klaft, P. Schwamb, G. Schwickert, N. Trautmann, and U. OthmerPhys. Rev. Lett. 68, 1675 (1992)
