Long Range Binding in Alkali-Helium Pairs
Kleinekathöfer, U. (Corresponding Author)
Lewerenz, M. / Mladenović, M.
Jülich Supercomputing Center; JSC
Zentralinstitut für Angewandte Mathematik; ZAM
Physical review letters, 83 (1999) 23, S. 4717 - 4720
College Park, Md. APS 1999
Journal Article
ohne Topic
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.83.4717 in citations.
Please use the identifier: http://hdl.handle.net/2128/7887 in citations.
Variational calculations are performed to search for bound rovibrational states of diatomic molecules formed from alkali atoms and helium in the very shallow Σ2 electronic ground state. Examination of a recent set of potential surfaces and several older potentials indicates that all pairs possess a single very diffuse bound state with J=0. Such marginally bound states will have profound effects on low energy collisions between alkali atoms and helium atoms. The sensitivity of these states with respect to retardation effects has been studied. The variational calculations employ a basis set of generalized Laguerre functions and new analytical expressions for kinetic energy matrix elements.