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

Y Guan; X Han; J Yang; Z Zhou; X Dai; E H Ahmed; A M Lyyra; S Magnier; V S Ivanov; A S Skublov; V B Sovkov

doi:10.1063/1.4823496

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

J Chem Phys. 2013 Oct 14;139(14):144303. doi: 10.1063/1.4823496.

Authors

Y Guan¹, X Han, J Yang, Z Zhou, X Dai, E H Ahmed, A M Lyyra, S Magnier, V S Ivanov, A S Skublov, V B Sovkov

Affiliation

¹ Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA.

PMID: 24116615
DOI: 10.1063/1.4823496

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.