Abstract

The isotope shift in the HgH spectrum for Hg¹⁹⁸H–Hg²⁰⁰H has been measured for 698 lines in the A ²Π−X ²∑⁺ system. The variation of the isotope shift with rotational frequency of the line is different for the various branches of a band, and greatly exceeds the variation predicted by the usual rotational and vibrational mass effects alone. This phenomenon is a consequence of the different nuclear volumes of the mercury isotopes. The results are evidence that the total electron probability density at the mercury nucleus increases with rotational frequency at a faster rate for the ground state than for the excited state.

© 1962 Optical Society of America

Hyperfine Structure in the Spectrum of Mercury Hydride*

Terence L. Porter and Sumner P. Davis
J. Opt. Soc. Am. 53(3) 338-343 (1963)

Band-Spectrum Analysis of Mercury Hydride*

Terence L. Porter
J. Opt. Soc. Am. 52(11) 1201-1205 (1962)

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 First Spectrum of Silicon (Si i)†

John R. Holmes and Martin E. Hoover
J. Opt. Soc. Am. 52(3) 247-250 (1962)

Wavelengths, Energy Levels, and Pressure Shifts in Mercury 198

Victor Kaufman
J. Opt. Soc. Am. 52(8) 866-870 (1962)