Abstract

Interferometric measurement of Pb ii lines produced by hollow-cathode sources were made to improve the values of derived Pb ii energy levels. A total of 50 lines were measured with a Fabry-Perot interferometer, from which values for 29 even levels and 12 odd levels were derived. Where isotope or hyperfine structure was resolved, the data were adjusted to give the center of gravity of natural Pb.

© 1974 Optical Society of America

Interferometric analyses of Ne ii and Ar ii spectral lines from a hollow-cathode discharge*

W. C. Kreye
J. Opt. Soc. Am. 64(2) 186-196 (1974)

New interferometric observations of Ar i in the photographic region*

Hui H. Li and Curtis J. Humphreys
J. Opt. Soc. Am. 64(8) 1072-1082 (1974)

Multipole Lines in the Spectra of Bi ii and Pb ii

C. Daniel Cole
J. Opt. Soc. Am. 54(7) 859-863 (1964)

Improved Cu ii Standard Wavelengths in the Vacuum Ultraviolet*

J. Reader, K. W. Meissner, and K. L. Andrew
J. Opt. Soc. Am. 50(3) 221-227 (1960)

Hyperfine structure in the ²⁵³Es emission spectrum, III: Extension of the line list, levels of Es i and Es ii, nuclear magnetic-dipole and quadrupole moments*

Earl F. Worden, R. W. Lougheed, R. G. Gutmacher, and John G. Conway
J. Opt. Soc. Am. 64(1) 77-85 (1974)