Laser Spectroscopy of the H2 (n = 3 Triplet Gerade) Complex: Fine and Hyperfine Structure of the Levels in ortho-H2

✍ Scribed by C. Ottinger; T. Rox; A. Sharma

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 578 KB
• Volume: 163
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1994.1036

✦ Synopsis

The measurements of the preceding paper of this series were extended to the (v=0) and I levels of (o r t h o-\mathrm{H}_{2}). In this case the additional hyperfine structure, which is comparable in magnitude to the fine structure in the (n=3) states, complicates the line profile patterns greatly. Because of strong mixing of fs and (\mathrm{hf}) interactions, even the identification of the line components was not straightforward. It was accomplished by means of an approximative line profile simulation, based on estimated coupling constants. The necessary matrix elements are given here for the first time. In a second iteration step, the final set of (20 \mathrm{hfs}) coupling constants was then obtained through a comprehensive fit to the large number ( 84 ) of measured hfs splittings. The Fermi contact constants were determined to within (2-3 %), or (10 \mathrm{MHz}). Many of the smaller constants were, however, found to be highly statistically correlated, similar to the results of the preceding paper. As a set they have, however, collective significance, as is demonstrated by the very successful simulation of the overall hfs line profile. (c) 1994 Academic Press. Inc.