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First observation of an excited state of Li2H

✍ Scribed by B. Vezin; Ph. Dugourd; D. Rayane; P. Labastie; M. Broyer

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
572 KB
Volume
202
Category
Article
ISSN
0009-2614

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✦ Synopsis

We report the first experimental optical spectra of L&H. Vibrational structure of the L&H B state has been obtained by twophoton ionization spectroscopy, as well as high-resolution rotational spectra. Simulations of the rotational structure in the first vibrational band allowed us to determine the geometry of L&H in the ground and excited B states: Li-Li=2.52 A, Li-H= I .7 15 A in the ground A, state and Li-Li=3.24 A, LiH =2.29 A in the B, state. The geometry found for the ground state is in excellent agreement with several ab initio calculations. The ionic character of both states is discussed.

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