The isotope shifts in the 283.3-nm resonance line of natural lead were measured by atomic-beam absorption spectroscopy with a 9.1-m focal-length spectrometer. The spectrum was calibrated internally by the measured 6p7s3P°1 hfs separation of 207Pb [J.-L. Cojan and H. R. Saussereau, C. R. Acad. Sci. Ser. B 277, 415 (1973)] and by the value calculated from the level-crossing results of Saloman and Happer [Phys. Rev. 144, 7 (1966)] and gj of Rudi-Saussereau et al. [Opt. Commun. 9, 186 (1973)]. The isotope shifts relative to 208Pb are -46.6(6), 207Pb center of gravity; -74.5(6), 206Pb; -142(3), 204Pb. The values are in units of 0.001 cm-1, the negative sign indicating a shift to lower wave numbers. The precision is nearly 1 order of magnitude greater than that of previous measurements.
© 1982 Optical Society of America
F. A. Moscatelli, O. Redi, P. Schönberger, H. H. Stroke, and R. L. Wiggins, "Isotope shifts in the 6p23P0–6p7s 3P°1 283.3-nm line of natural lead," J. Opt. Soc. Am. 72, 918-922 (1982)