Spectroscopic characterization of the X 2Π1/2, B 2Σ1/2, and H 2Σ1/2 states of AlKr

Autor:	John G. Kaup, Steven Massick, Odile Benoist d’Azy, W. H. Breckenridge, Zhenwen Fu
Rok vydání:	1992
Předmět:	Valence (chemistry) Chemistry General Physics and Astronomy Bond-dissociation energy Bond length symbols.namesake Excited state symbols Rotational spectroscopy Physical and Theoretical Chemistry van der Waals force Atomic physics Ground state Spectroscopy
Zdroj:	The Journal of Chemical Physics. 97:1683-1691
ISSN:	1089-7690 0021-9606
Popis:	The AlKr van der Waals complex was characterized by laser‐induced fluorescence spectroscopy in a supersonic free jet. Rotationally resolved spectra were recorded for eight bands of the AlKr(B 2Σ+←X 2Π1/2) transition and for seven bands of the AlKr(H 2Σ+←X 2Π1/2) transition. Rydberg–Klein–Rees potential‐energy curves were determined for the B 2Σ+ and H 2Σ+ states, using vibrational and rotational spectroscopic constants derived from the spectra. The interaction between the X 2Π1/2 ground state and the low‐lying repulsive A 2Σ+ state was characterized by analysis of the Λ doubling in the ground state. Equilibrium bond lengths were obtained for the X, B, and H states, and dissociation energies for the B and H states. The fact that the more strongly bound H 2Σ+ state has a larger re value than the B 2Σ+ state was rationalized by postulating an avoided potential curve crossing between the H 2Σ+ state and a repulsive valence 2Σ+ state correlating with Al(3s23d)+Kr.
Databáze:	OpenAIRE
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