Observation of the shallow 2 Π 1 state of NaH

Chia Ching Chu, Hsien Yu Huang, Hsiang Chin Lin, Yi Hsiang Hsiao, Thou Jen Whang, Chin Chun Tsai

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Abstract

The 2 1Π 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 (v = 2-4 and J = 1-9) were assigned to this electronic state by means of comparing the successive rovibrational spectra to the eigenvalues of the ab initio 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 1Π state. Unobserved rovibrational levels (v = 0 and 1) are due to poor Franck-Condon overlap of 2 1Π ← A 1Σ+ transition within the accessible rovibrational levels of intermediate A 1Σ+ state of this work.

Original languageEnglish
Article number024303
JournalJournal of Chemical Physics
Volume150
Issue number2
DOIs
Publication statusPublished - 2019 Jan 14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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