Dispersion coefficients for alkali-metal dimers

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.982· OSTI ID:5224570

Marinescu, M; Sadeghpour, H R; Dalgarno, A ^[1]

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1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States)

Knowledge of the long-range interaction between atoms and molecules is of fundamental importance for low-energy and low-temperature collisions. The electronic interaction between the charge distributions of two ground-state alkali-metal atoms can be expanded in inverse powers of [ital R], the internuclear distance. The coefficients [ital C][sub 6], [ital C][sub 8], and [ital C][sub 10] of, respectively, the [ital R][sup [minus]6], [ital R][sup [minus]8], and [ital R][sup [minus]10] terms are calculated by integrating the products of the dynamic electric multipole polarizabilities of the individual atoms at imaginary frequencies, which are in turn obtained by solving two coupled inhomogeneous differential equations. Precise one-electron model potentials are developed to represent the motion of the valence electron in the field of the closed alkali-metal positive-ion core. The numerical results for the static multipole polarizabilities for the alkali-metal atoms and the coefficients [ital C][sub 6], [ital C][sub 8], and [ital C][sub 10] for homonuclear and heteronuclear alkali-metal diatoms are compared with other calculations.

• OSTI ID: 5224570
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:2; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664100* -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
CHARGE DISTRIBUTION
DIMERS
DISPERSION RELATIONS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY LEVELS
GROUND STATES
INTERATOMIC FORCES
METALS
MULTIPOLES
PHYSICAL PROPERTIES
POLARIZABILITY
SERIES EXPANSION