Abstract
Stable unidirectional ring laser oscillation of optically pumped 6Li2 molecules was obtained for the first time. We observed transitions in the range 5237–5889 Å excited by different argon ion laser lines in the range 4579–4965 Å. Using our laser-induced fluorescence results for this molecule, we have assigned unambiguously 23 of 27 lines to specific rovibronic transitions in the B1Πu→X1Σ+g band system of 6Li2. The optimum pressure for operation of the optically pumped 6Li2 laser was found to be ∼4 Torr.
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