title: Accurate ab initio based multisheeted double many-body expansion potential energy surface for the three lowest electronic singlet states of H3+.
abstract: The authors present diabatic and adiabatic potential energy surfaces for the three lowest electronic singlet states of H3+. The modeling of the surfaces is based on the multi-sheeted double many-body expansion method which consists of dressing the various matrix elements of the diatomics-in-molecules potential matrix with three-body terms. The avoided crossing between the two lowest states and the conical intersection between the second and the third state are accurately represented by construction.
authors.affiliation: Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal.
authors.forename: Luís P
authors.initials: LP
authors.lastname: Viegas
authors.forename: Alexander
authors.initials: A
authors.lastname: Alijah
authors.forename: António J C
authors.initials: AJ
authors.lastname: Varandas