Chu CC, Huang C, Tsai CC, Whang TJ. Spectroscopic Study of the
B 1Π State of NaH.
ACS OMEGA 2021;
6:20629-20636. [PMID:
34396008 PMCID:
PMC8359152 DOI:
10.1021/acsomega.1c02767]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
In this study, the B 1Π excited state of NaH has been experimentally studied for the first time. Pulsed laser-induced fluorescence excitation spectroscopy was used to investigate the B 1Π electronic state of NaH. A total of 48 ro-vibronic transitions were observed, including within the B-X (0-0) and B-X (0-1) transition bands. Only one B-state vibrational level was identified, and a series of PQR lines, with eight e-parity and eight f-parity sublevels (v' = 0, J' = 1-8), were assigned. The level assignment was supported by a comparison of the experimental line positions with the ab initio calculations, the dispersed laser-induced fluorescence spectrum of the NaH B 1Π → X 1∑+ emission, and the V-type optical-optical double resonance spectra. The Dunham-type coefficients, the mean internuclear distance, the harmonic vibrational frequency ω, and the dissociation energies D 0 and D e of the B 1Π state were determined.
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