Study of the 71Π u state of sodium dimer by polarisation labelling spectroscopy. (18th October 2022)

• Record Type: Journal Article
• Authors: Kowalczyk, P.; Grochola, A.; Jastrzebski, W.
• Is Part Of: Molecular physics. Volume 120:Number 19/20(2022)
• Publication Date: 2022-10-18
• Subjects: Laser spectroscopy -- alkali dimers -- electronic states -- molecular constants -- potential energy curves; Molecules -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Molécules -- Périodiques; Chimie physique et théorique -- Périodiques; 539.6.05
• DOI: 10.1080/00268976.2022.2027536
• Languages: English
• ISSNs: 0026-8976

Abstract

Abstract : Two-colour polarisation labelling experiment measuring excitation spectra of Na 2 in the spectral range 34, 600−39, 400 cm − 1 has furnished observation of the previously unknown 7 1 Π u electronic state. The excited state is characterised by a set of Dunham coefficients describing the f parity levels up to vibrational level v = 28 and the corresponding potential energy curve is constructed by the inverted perturbation approach method. Molecular parameters determined in the fit include T e = 36583.86 ± 0.03 cm − 1, ω e = 107.50 ± 0.03 cm − 1 and R e = 3.640 ± 0.001 Å. GRAPHICAL ABSTRACT: UF0001