Long range binding in alkali-helium pairs

Citation
U. Kleinekathofer et al., Long range binding in alkali-helium pairs, PHYS REV L, 83(23), 1999, pp. 4717-4720
Citations number
43
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
23
Year of publication
1999
Pages
4717 - 4720
Database
ISI
SICI code
0031-9007(199912)83:23<4717:LRBIAP>2.0.ZU;2-3
Abstract
Variational calculations are pet-formed to search for bound rovibrational s tates of diatomic molecules formed from alkali atoms and helium in the very shallow (2)Sigma electronic ground state. Examination of a recent set of p otential surfaces and several older potentials indicates that all pairs pos sess a single very diffuse bound state with J = 0. Such marginally bound st ates will have profound effects on low energy collisions between alkali ato ms and helium atoms. The sensitivity of these states with respect to retard ation effects has been studied. The variational calculations employ a basis set of generalized Laguerre functions and new analytical expressions for k inetic energy matrix elements.