Ab initio rotational and rovibrational transitions and linestrengths of He2N2+

Ab initio calculations of transition frequencies and linestrengths for the rotational spectrum and nu (2) fundamental rovibrational of He2N2+ have bee n calculated. The calculations are based on variational solutions of an Eck art-Watson rovibrational Hamiltonian, which has embedded a highly accurate ab initio force field of Hughes and von Nagy-Felsobuki. Although experiment al data are unavailable, the ab initio data presented may be timely in assi sting laboratory and possibly interstellar detection of this helide ion. (C ) 2001 Academic Press.