title: Theoretical study of Rb2 in He(N): potential energy surface and Monte Carlo simulations.
abstract: An analytical potential energy surface for a rigid Rb₂ in the ³Σ(u)⁺ state interacting with one helium atom based on accurate ab initio computations is proposed. This 2-dimensional potential is used, together with the pair approximation approach, to investigate Rb₂ attached to small helium clusters He(N) with N = 1-6, 12, and 20 by means of quantum Monte Carlo studies. The limit of large clusters is approximated by a flat helium surface. The relative orientation of the dialkali axis and the helium surface is found to be parallel. Dynamical investigations of the pendular and of the in-plane rotation of the rigid Rb₂ molecule on the surface are presented.
authors: Institut de Physique de Rennes, UMR 6251, CNRS & Université de Rennes I, F-35042 Rennes, France.
authors: Grégroire
authors: G
authors: Guillon
authors: Alexandre
authors: A
authors: Zanchet
authors: Markku
authors: M
authors: Leino
authors: Alexandra
authors: A
authors: Viel
authors: Robert E
authors: RE
authors: Zillich