Phys. Rev. A 67, 054702 (2003) [4 pages]Three-body nonadditive forces between spin-polarized alkali-metal atomsReceived 5 November 2002; published 28 May 2003 Three-body nonadditive forces in systems of three spin-polarized alkali-metal atoms (Li, Na, K, Rb, and Cs) are investigated using high-level ab initio calculations. The nonadditive forces are found to be large, especially near the equilateral equilibrium geometries. For Li, they increase the three-atom potential well depth by a factor of 4 and reduce the equilibrium interatomic distance by 1.07Å. The nonadditive forces originate principally from chemical bonding arising from sp mixing effects. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.67.054702
DOI:
10.1103/PhysRevA.67.054702
PACS:
34.20.Mq, 31.50.Bc
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