Further investigations of the (A)over-tilde <- (X)over-tilde transition ofthe Kr center dot NO and XeNO complexes using (1+1) REMPI spectroscopy

The (A) over tilde <-- (X) over tilde transitions of the Kr . NO and Xe . N O molecular complexes have been recorded with improved quality. Ln both cas es the origin band consists of a single feature, consistent with a (near) l inear (A) over tilde state. The spectra demonstrate a wealth of structure, which increases in complexity to higher energy; this is interpreted in term s of a weakening of the interaction as the internal energy increases. Disso ciation energies for both the (X) over tilde and (A) over tilde states are derived. Attempts to record the corresponding spectra for Ne . NO were unsu ccessful. The trend in the binding energies in the (X) over tilde and (A) o ver tilde states of Rg . NO (Rg = He-Xe) is discussed. (C) 2000 Elsevier Sc ience B.V. All rights reserved.