Third-order perturbation theory for van der Waals interaction coefficients

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.052502· OSTI ID:22093503

Liyan, Tang; Tingyun, Shi ^[1]; Zongchao, Yan ^[2]; Mitroy, J. ^[3]

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1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)
2. Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071 (China)
3. School of Engineering, Charles Darwin University, Darwin NT 0909 (Australia)

The third-order expression for the dispersion interaction between two atoms is written as a sum over lists of transition matrix elements. Particular attention is given to the C{sub 9}/R{sup 9} interaction which occurs in the homonuclear case when one atom is in an S state and the other is in a P state. Numerical values of the C{sub 9} coefficient are given for the homonuclear alkali-metal dimers. The size of the C{sub 9}:C{sub 3} dispersion coefficient ratio increases for the heavier alkali-metal atoms. The C{sub 11} and C{sub 13} coefficients between two helium atoms and lithium atoms in their ground states are also given.

• OSTI ID: 22093503
• Journal Information: Physical Review. A, Vol. 84, Issue 5; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
DIMERS
GROUND STATES
HELIUM
LITHIUM
MATRIX ELEMENTS
P STATES
PERTURBATION THEORY
S STATES
VAN DER WAALS FORCES