Abstract
On-line resonance-ionization mass spectrometry has been applied to determine the isotope shift and hyperfine structure of and in the 6s →6p (λ=268 nm) transition. The Au atoms were obtained as daughters of mass-separated Hg isotopes produced at the ISOLDE facility at CERN ionized by a three-color, two-step resonant photoionization process, detected and mass-selected by time of flight. A drastic change of the nuclear charge radius was observed between and , which is interpreted as an onset of strong deformation of β≊0.25 in and .
- Received 29 December 1986
DOI:https://doi.org/10.1103/PhysRevLett.58.1516
©1987 American Physical Society