Eur. Phys. J. D 37, 435-439 (2006)
https://doi.org/10.1140/epjd/e2006-00034-2

Ultra-long-range states in excited ³He₂

School of Natural Sciences (Physics), University of Newcastle, NE1 7, RU Newcastle upon Tyne, UK

Corresponding author: ^a A.S.Dickinson@ncl.ac.uk

Received: 24 November 2005
Published online: 14 February 2006

Abstract

Long-range potentials have been calculated for ³He₂ molecules dissociating to ³He 2 ³S + ³He 2 ³P, including the retarded dipole and the van der Waals interactions. Ultra-long-range wells with depths of up to about 2.4 GHz have been found in many of the adiabatic body-fixed potentials and rovibrational levels have been calculated for some of these wells, which have been found to support up to 4 rotationless vibrational levels.