title: Updated potential energy function of the Rb2 a(3)Σu(+) state in the attractive and repulsive regions determined from its joint analysis with the 2(3)Π0g state.
abstract: We report new experimental data for the Rb2 a(3)Σu(+) and 2(3)Π0g states obtained using the Perturbation Facilitated Infrared-Infrared Double Resonance (PFIIDR) technique. The results include ro-vibrational term values of the 2(3)Π0g state and resolved fluorescence spectra of the 2(3)Π0g→a(3)Σu(+) transitions for a wide range of rotational and vibrational quantum numbers. An analysis of these data confirms the initial assignment of the transitions to the a(3)Σu(+) state reported in our earlier work [B. Beser, V. B. Sovkov, J. Bai, E. H. Ahmed, C. C. Tsai, F. Xie, L. Li, V. S. Ivanov, and A. M. Lyyra, J. Chem. Phys. 131, 094505 (2009)]. The potential energy functions of the Rb2 a(3)Σu(+) and 2(3)Π0g states are derived from a simultaneous fit of the available experimental data. The improved potential function of the Rb2 a(3)Σu(+) state spans both the attractive and repulsive regions starting with internuclear distance R ∼ 4.5 Å.
authors.affiliation: Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Guan
authors.forename: X
authors.initials: X
authors.lastname: Han
authors.forename: J
authors.initials: J
authors.lastname: Yang
authors.forename: Z
authors.initials: Z
authors.lastname: Zhou
authors.forename: X
authors.initials: X
authors.lastname: Dai
authors.forename: E H
authors.initials: EH
authors.lastname: Ahmed
authors.forename: A M
authors.initials: AM
authors.lastname: Lyyra
authors.forename: S
authors.initials: S
authors.lastname: Magnier
authors.forename: V S
authors.initials: VS
authors.lastname: Ivanov
authors.forename: A S
authors.initials: AS
authors.lastname: Skublov
authors.forename: V B
authors.initials: VB
authors.lastname: Sovkov