Abstract
With a beam of unenriched lanthanum, the hyperfine structure (hfs) of has been measured for the transition from the ground state to the level at 675.304 nm by means of atomic-beam diode-laser spectroscopy. Magnetic-dipole (A) and electric-quadrupole constants of the 0.090% abundant as well as those of have been determined for the and levels; this serves as a measurement of hyperfine structure constants A and B for The isotope shift between and has been obtained for the 675.304-nm transition and change in mean-square nuclear charge radii derived.
- Received 13 November 2000
DOI:https://doi.org/10.1103/PhysRevA.63.064501
©2001 American Physical Society