Abstract

The 6150-Å laser transition in Hg ii generated in a pulsed hollow cathode discharge, has been studied under high resolution. The line shows structure corresponding to the expected shifts from the even isotopes, with a spacing of approximately 26.5 mK (800 Mc/sec) between adjacent components, in rough agreement with earlier results. The fullwidth at half-maximum of each component has been measured as 500 Mc/sec. The wavelength has been compared to that of thorium secondary wavelength standards and it has been determined that the vacuum wavelength of the ²⁰²Hg component is 6151.1650 Å. The possibility of the mercury hollow cathode laser as a laboratory wavelength standard is pointed out.

© 1965 Optical Society of America

Hyperfine Structure and Isotope Shifts in the 2537-Å Line of Mercury by a New Interferometric Method

Walter G. Schweitzer
J. Opt. Soc. Am. 53(9) 1055-1072 (1963)

Interferometric Wavelengths of Thorium Lines between 9050 and 2566 Å

T. A. Littlefield and Anne Wood
J. Opt. Soc. Am. 55(11) 1509-1516 (1965)

Isotope Shift in the Spectrum of Mercury*

Fred McClung and John R. Holmes
J. Opt. Soc. Am. 47(4) 297-299 (1957)

Isotope Shift in the Spectrum of Mercury Hydride*

Terence L. Porter and Sumner P. Davis
J. Opt. Soc. Am. 52(11) 1206-1208 (1962)

Precise laser frequency scanning using frequency-synthesized optical frequency sidebands: application to isotope shifts and hyperfine structure of mercury

M. D. Rayman, C. G. Aminoff, and J. L. Hall
J. Opt. Soc. Am. B 6(4) 539-549 (1989)