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The 43Πg State of Na2: Vibrational Numbering and Hyperfine Structure

✍ Scribed by G. Lazarov; A.M. Lyyra; Li Li; J. Huennekens

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
116 KB
Volume
196
Category
Article
ISSN
0022-2852

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✦ Synopsis

The Na 2 4 3 ⌸ g state has been studied by continuous-wave (cw) perturbation-facilitated optical-optical double resonance (PFOODR) fluorescence excitation and resolved fluorescence spectroscopy. The absolute vibrational numbering was determined by resolved fluorescence to the a 3 ⌺ u ϩ state. The OODR excitation lines of the

vЉ, JЉ) transitions show hyperfine splittings, and the hyperfine coupling scheme of the upper 4 3 ⌸ g levels is case b ␤S . Although this 4 3 ⌸ g state dissociates to the 3p ϩ 3p atomic limit, it is a Rydberg state at a small internuclear distance, and the hyperfine splitting is caused mainly by the Fermi contact interaction of the g 3s valence electron with the nuclei. The Fermi contact constant was determined to be b F ϭ 218.3 Ϯ 3.9 MHz.

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