Joe has done research on the spectra of rare earth atoms, spectra of highly ionized atoms, hyperfine structure, and design of optical spectrometers. Current interests include spectra of ionized atoms of importance for diagnostics of controlled fusion plasmas (Zr VI, Nb IV, Mo VI), radiometry of fluorescent-lamp-type discharges in the ultraviolet, and critical compilations of atomic spectra (Ga, W, Ni-like ions).
NIST Fellow 2011
Director, Atomic Energy Levels Project, NIST Data Center on Atomic SpectroscopyGroup Leader, Atomic Spectroscopy Group, NIST, 1998-2008
National Institute of Standards and Technology, 1963-PresentChairman, National Research Council Committee on Line Spectra of the Elements, 1976-1979
University of California, Berkley, Ph.D., 1962
Fellow, American Physical SocietyFellow, Optical Society of AmericaSigma Xi, Honorary Society
Editor, "Line Spectra of the Elements," in Handbook of Chemistry and Physics, CRC Press, Annual Publication