Abstract
An electronic spectrum is observed for the new heteronuclear metal dimer, LiAl. This dimer is produced by laser vaporization of an alloy metal sample in a pulsed nozzle cluster source. Resonant two-photon photoionization (R2PI) is employed to collect this spectrum. We observe and characterize two excited electronic states for both the 6Li-Al and 7Li-Al isotopes. The analysis of hotbands provides the vibrational frequency (318.3cm −1) and dissociation energy (0.75eV) for the LiAl ground state, which both agree well with the predictions of ab initio theory.
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