The coupled system (2)2Σ+ and (1)2Π of 7Li88Sr. (4th March 2020)

• Record Type: Journal Article
• Authors: Schwanke, Erik; Gerschmann, Julia; Knöckel, Horst; Ospelkaus, Silke; Tiemann, Eberhard
• Is Part Of: Journal of physics. Volume 53:Number 6(2020:Mar. 15)
• Publication Date: 2020-03-04
• Subjects: rotation -- vibration and vibration–rotation constants -- molecular spectra -- potential energy surfaces; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/ab68f8
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: We analyse rovibrational transitions of the (2) 2 Σ + – X (1) 2 Σ + system of LiSr and find the energy levels of the (2) 2 Σ + state to be perturbed by coupling between the (2) 2 Σ + and (1) 2 Π states. We present an analysis of the coupled system yielding molecular parameters for the lowest vibrational levels of the (2) 2 Σ + state and for higher vibrational levels of the (1) 2 Π state together with molecular coupling constants. Improved Dunham coefficients for the rovibrational levels of the X (1) 2 Σ + state are also obtained, where the correlation with the parameters of the excited states is removed completely.