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The A 1Sigmau+ state of K2 up to the dissociation limit
St Falke1, I Sherstov, E Tiemann
1Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167 Hannover, Germany. falke@iqo.uni-hannover.de
Abstract:
We report an experimental study of the K(2) A (1)Sigma(u) (+) state. Long-range levels up to the dissociation limit were observed in a two laser spectroscopic experiment using a highly collimated molecular beam. We derive an analytical potential energy curve for the complete A state including long-range dispersion terms. From these, we obtain radiative atomic lifetimes of 26.74(3) ns for the 4p(1/2) state and 26.39(3) ns for the 4p(3/2) state of (39)K. The dissociation energy of the X (1)Sigma(g) (+) ground state with respect to v=0, J=0 is found to be D(0)=4404.808(4) cm(-1).
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