Abstract
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 C9/R9 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 C9 coefficient are given for the homonuclear alkali-metal dimers. The size of the C9:C3 dispersion coefficient ratio increases for the heavier alkali-metal atoms. The C11 and C13 coefficients between two helium atoms and lithium atoms in their ground states are also given.
Original language | English |
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Article number | 052502 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 84 |
Issue number | 5 |
DOIs | |
Publication status | Published - 4 Nov 2011 |