title: Wavelengths and Energy Levels of Neutral Kr84and Level Shifts in All Kr Even Isotopes.
abstract: Interferometrically-measured wavelengths of 109 lines of neutral Kr84are compared with those of Kr86. Sixty energy levels of neutral Kr84derived from those wavelengths and 25 Kr86-Kr84isotope shifts previously measured are given along with their shifts from the energy levels of Kr86. Twenty levels of each of Kr82, Kr80, and Kr78are also evaluated using isotope-shift information in the literature. The differences between the experimentally observed shifts and the normal mass shift leave large negative residuals which are accounted for by ionization energy differences and by the specific mass shift. It appears that the volume effect causes only a very small, if any, energy level shift.
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899-0001.
authors.forename: Victor
authors.initials: V
authors.lastname: Kaufman
keywords: energy levels; interferometry; isotope shift; krypton; wavelengths