Abstract
We present semiempirical calculations of long-range van der Waals interactions for two interacting metastable rare-gas atoms Ne through Xe. Dispersion coefficients $C_6$ are obtained for homonuclear molecular potentials asymptotically connecting to the $ns(3/2)_{2} + ns(3/2)_{2}$ atomic states. The estimated uncertainty of the calculated $C_6$ dispersion coefficients is 4%.
Highlights
Dispersion coefficients C6 are obtained for homonuclear molecular potentials asymptotically connecting to the ns(3/2)2 + ns(3/2)2 atomic states
Motivated by cold-collision studies of metastable rare-gas atoms [1,2,3,4] and prospects of achieving Bose-Einstein. Condensation in these systems [5], we present calculations of long-range dispersion coefficients for two atoms interacting in the ns(3/2)2 atomic states (n = 3 for Ne, n = 4 for Ar, n = 5 for Kr, and n = 6 for Xe)
The lack of hyperfine structure leads to a substantial simplification of molecular potentials, though some complexity arises due to the nonvanishing total electron angular momentum (J=2) of the metastable state
Summary
We present semiempirical calculations of long-range van der Waals interactions for two interacting metastable rare-gas atoms Ne through Xe. Dispersion coefficients C6 are obtained for homonuclear molecular potentials asymptotically connecting to the ns(3/2)2 + ns(3/2)2 atomic states. By using many-body methods and accurate experimental matrix elements for the principal transitions, leading dispersion coefficients C6 were determined to an accuracy better than 1% for Na, K, and Rb, and of 1% for Cs and 1.5% for Fr. The semiempirical values of C6 coefficients for metastable noble-gas atoms obtained here have an estimated uncertainty of 4%.
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