The Rb2 31Π g state: Observation and analysis

Phillip T Arndt; Vladimir B Sovkov; Jie Ma; Xinhua Pan; David S Beecher; Jeng Y Tsai; Yafei Guan; A Marjatta Lyyra; Ergin H Ahmed

doi:10.1063/1.5058282

The Rb₂ 3¹Π _g state: Observation and analysis

J Chem Phys. 2018 Dec 14;149(22):224303. doi: 10.1063/1.5058282.

Authors

Phillip T Arndt¹, Vladimir B Sovkov², Jie Ma³, Xinhua Pan¹, David S Beecher¹, Jeng Y Tsai¹, Yafei Guan¹, A Marjatta Lyyra¹, Ergin H Ahmed¹

Affiliations

¹ Physics Department, Temple University, Philadelphia, Pennsylvania 19122-6082, USA.
² St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia.
³ State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, College of Physics and Electronics, Shanxi University, Taiyuan 030006, China.

PMID: 30553240
DOI: 10.1063/1.5058282

Abstract

This paper reports observations and analysis of the Rb₂ 3¹Π _g state. A total of 323 rovibrational term values spanning the range of the rotational quantum number J = 7 through 77 and the vibrational quantum number $v$ = 2 through 23 (about 1/3 of the potential well depth) were measured using the optical-optical double resonance technique. The term values are simulated within a model of a piece-wise multi-parameter potential energy function based on the generalized splines. This function not only enables a reproduction of the experimental data with a reasonable quality but also approximates the available ab initio function in its whole range with a uniform accuracy.