Abstract
Mercury isotopes are investigated with two-color resonance ionization mass spectroscopy (RIMS). Isotope shifts, hyperfine structure splittings, and the lifetime of the intermediate 6s6p 3P1 state are determined by RIMS. Ion yields at the threshold region in various static electric fields are measured in order to determine an extrapolated ionization energy value at zero field strength. New energy values for high-lying bound 6s nd 3D (21<n<70) Rydberg states of Hg isotopes are found under field-free conditions and with delayed, pulsed electric field ionization. To the author’s knowledge this is the first time that isotopic effects on the ionization energy are deduced from the convergence limit of the Rydberg series.
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