We have determined the first ionization potentials of tungsten and rhenium atoms to be 63427.7 ± 0.8 cm-1 (7.86404 ± 0.00010 eV) (2σ error bound) and 63181.6 ± 0.9 cm-1 (7.83352 ± 0.00011 eV), respectively, by fitting ns and nd Rydberg series obtained by performing mass-selected double-resonance ionization spectroscopy on supersonic beams of laser-vaporized tungsten and rhenium atoms.
© 1996 Optical Society of America
Margot D. Campbell-Miller and Benoit Simard, "First ionization potentials of tungsten and rhenium by mass-selected double-resonance ionization spectroscopy," J. Opt. Soc. Am. B 13, 2115-2120 (1996)