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>Multipolar longhyphen;range electrostatic, dispersion, and induction energy terms for the interactions between two identical alkali atoms Li, Na, K, Rb, and Cs in various electronic states
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Multipolar longhyphen;range electrostatic, dispersion, and induction energy terms for the interactions between two identical alkali atoms Li, Na, K, Rb, and Cs in various electronic states
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机译：Multipolar longhyphen;range electrostatic, dispersion, and induction energy terms for the interactions between two identical alkali atoms Li, Na, K, Rb, and Cs in various electronic states
For the alkali dimers Li2, Na2, K2, Rb2, and Cs2longhyphen;range potential energy curves of the molecular states corresponding to the asymptotesns+nsandns+nphave been investigated from standard perturbation method up to second order in the multipolar expansion approximation of the interaction energy. Two different cases have been considered: (i) neglecting spinhyphen;orbit effects and then values of the longhyphen;range expansion coefficientsCn,n=(3), 6, 8, (10) have been determined (ii) including spinhyphen;orbit effects and then potential energy curves have been determined numerically and are graphically displayed. Very good agreement is obtained between present curves and very recent longhyphen;range experimental ones for theXthinsp;1Sgr;+gstate of Li2and for theXthinsp;1Sgr;g+and1Pgr;gstates of Na2. The position and the energy of purely longhyphen;range extrema of the states 1u(2S1/2+2P1/2), 1u(2S1/2+2P3/2) and 0gminus;(2S1/2+2P3/2) have been determined for each alkali dimer investigated.
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