Abstract
Using Doppler-free frequency-modulation spectroscopy, we have measured most of the hyperfine components and the centers of gravity of the line of and the line of . By using previously measured fine- and hyperfine-structure splittings, we have also determined centers of gravity for the line of and the line of . Our present results are more accurate than previously reported values by a factor of more than 100. The wave numbers are : 14 903.983 468 (14) ; : 14 903.648 130 (14) ; : 14 903.632 116(18) ; : 14 903.296 792 (23) . Values for the isotope shifts of the resonance lines of 0.351 338 (21) for the line and 0.351 352 (15) for the line have been derived. All uncertainties represent a 95% level of confidence.
- Received 10 February 1995
DOI:https://doi.org/10.1103/PhysRevA.52.2682
©1995 American Physical Society