Determination of Interatomic Potentials for the X0+, A0+, and B1 States of HgKr from Fluorescence and Excitation Spectra

✍ Scribed by J. Koperski; J.B. Atkinson; L. Krause

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 314 KB
• Volume: 207
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2001.8336

✦ Synopsis

We present an analysis of the A0 + (6 3 P 1 ) → X 0 + (6 1 S 0 ) bound-bound and bound-free fluorescence spectrums and of the A0 + (6 3 P 1 ) ← X 0 + (6 1 S 0 ) and B1(6 3 P 1 ) ← X 0 + (6 1 S 0 ) bound-bound excitation spectrum of the HgKr van der Waals molecule. The A → X fluorescence spectrum, which was observed for the first time, as well as the excitation spectra were recorded using a pulsed supersonic molecular beam crossed with a pulsed dye laser beam. An analysis of the A(v ) ← X (v ), B(v ) ← X (v ), and A(v = 8) → X (v ) bound-bound bands indicates that a Morse function combined with a long-range approximation represents the interatomic potential energy curve of the A, B, and X states below the dissociation limit. In the simulation of the A (v = 8) → X bound-free spectrum the Morse, Lennard-Jones (n-6), and Maitland-Smith (n 0 , n 1 ) functions were tested, and the Maitland-Smith (11.39, 10.50) potential was found to be a good representation of the repulsive part of the X -state PE curve above the dissociation limit, over the internuclear separation range R = 2.85-3.55 A . The spectroscopic characteristics for the A, B, and X states obtained in this work are compared with other available experimental and theoretical results.