Stimulated emission is observed on the 2p2P1/2,3/2→ 2s2S1/2resonance transition of Li at 670.7 nm when lithium iodide (LiI) is photodissociated with the output from an ArF laser (λ = 193nm). Minimizing sodium iodide (NaI) as an impurity is crucial and the laser lifetime (several hours) appears to be limited by reaction of LiI with the walls of the quartz cell.
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Johnson et al. (1983) studied this question.
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