# ON THE LONG RANGE PART OF THE POTENTIAL CURVE OF THE $A_{1}$ STATE IN $^{6}Li_{2}$

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 dc.creator Martin, F. en_US dc.creator Aubert-Frécon, M. en_US dc.creator Bacis, R. en_US dc.creator Ross, A. J. en_US dc.creator Crozet, P. en_US dc.creator Russier, I. en_US dc.creator Magnier, S. en_US dc.creator Linton, C. en_US dc.date.accessioned 2006-06-15T15:37:57Z dc.date.available 2006-06-15T15:37:57Z dc.date.issued 1996 en_US dc.identifier 1996-WH-01 en_US dc.identifier.uri http://hdl.handle.net/1811/13757 dc.description [1] Abraham et al., J. Chem. Phys. 103, 773 (1995) [2] Linton et al., J. Mol. Spec. 00, 00 (1996) [3] LeRoy, J. Chem, Phys. 73, 6003 (1980) en_US dc.description Author Institution: Laboratoire de Spectrom\'{e}trie Ionique et Mol\'{e}culaire, UMR 5579 CNRS et Universit\'{e} Lyon I; Centre for Laser Applications and Molecular Science and Department of Physics, University of New Brunswick en_US dc.description.abstract Using results from photoassociation experiments involving ultracold $^{6}Li$ atoms [1] and dispersed fluorescence data from optical-optical double resonance spectroscopy [2], we have constructed an experimental RKR curve for the $A_{1}$ state extending to 74 \AA. The dissociation energy $D_{e}$ with respect to the bottom of the $A_{1}$ state is obtained directly from a fit of the energy levels, $D_{e} =9352.03(1)$ cm $^{-1}$. The potential energy curve V(R) for the $A_{1}$ state deviates slowly from the usual $V(R) = D_{e} - C_{3}/R^{3} +\ldots$ expression [3], reflecting a gradual transition from Hund#### case a) to Hund#### case c) coupling in the molecule. The outer limb of the curve varies with $1/R^{n}$ in a more complex way because of interactions between the two $0_{u}^{+}$ components dissociating to Li(2s) + Li(2p). We present the general analytical form of the long-range part of the $A_{1}$ state derived from a treatment which includes all the off-diagonal terms in the interaction matrix. The lithium dimer data have provided a test of the validity of this model; energies are recalculated to within $0.008 cm^{-1}$ for 12$R_{74}$ \AA, with six parameters. en_US dc.format.extent 136899 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ON THE LONG RANGE PART OF THE POTENTIAL CURVE OF THE $A_{1}$ STATE IN $^{6}Li_{2}$ en_US dc.type article en_US