Observation of the shallow 2 Π 1 state of NaH

The 2 Π state of NaH has been observed up to the last bound vibrational level using pulsed optical-optical double resonance fluorescence depletion spectroscopy. A total of 20 rovibrational energy levels ( = 2-4 and = 1-9) were assigned to this electronic state by means of comparing the successive ro...

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Published inThe Journal of chemical physics Vol. 150; no. 2; p. 024303
Main Authors Chu, Chia-Ching, Huang, Hsien-Yu, Lin, Hsiang-Chin, Hsiao, Yi-Hsiang, Whang, Thou-Jen, Tsai, Chin-Chun
Format Journal Article
LanguageEnglish
Published United States 14.01.2019
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Summary:The 2 Π state of NaH has been observed up to the last bound vibrational level using pulsed optical-optical double resonance fluorescence depletion spectroscopy. A total of 20 rovibrational energy levels ( = 2-4 and = 1-9) were assigned to this electronic state by means of comparing the successive rovibrational spectra to the eigenvalues of the potential energy curve. The decrease of background fluorescence near the atomic asymptotic limit Na(3d) + H(1s) is an indication of reaching the dissociation limit of the NaH 2 Π state. Unobserved rovibrational levels ( = 0 and 1) are due to poor Franck-Condon overlap of 2 Π ← Σ transition within the accessible rovibrational levels of intermediate Σ state of this work.
ISSN:1089-7690
DOI:10.1063/1.5065460