Near-infrared laser spectroscopy of TiS: The b1II-X3Δ transition

A. S.C. Cheung, Qin Ran, W. S. Tam, Kam Wah Mok, P. M. Yeung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


Laser-induced fluorescence spectrum of TiS in the 769-863 nm region has been recorded and analyzed. The TiS molecule was produced using the technique of laser vaporization/reaction with supersonic cooling. Twenty-one weak subbands have been assigned as being due to b1II-X3, B3II0-X3Δ1, and C3Δ-X3Δ transitions. Strong evidence shows that the b1II state is responsible for perturbing the v = 0, 1, and 2 levels of the C3Δ1subband. The molecular constants of the b1II state have been determined as follows: Te= 10 589.47 cm-1, ωe= 542.14 cm-1, ωexe= 3.16 cm-1, Be= 0.19568 cm-1, and αe= 0.00085 cm-1. The spin-orbit interaction between the b1II (v = 2 and 3) and C3Δ (v = 1 and 2) levels is discussed in terms of configuration interaction occurring between the b1II from the 11σ15π1configuration and the1II from the 5π11δ1configuration, and the C3Δ state from 12σ11δ1configuration,
Original languageEnglish
Pages (from-to)96-104
Number of pages9
JournalJournal of Molecular Spectroscopy
Issue number1
Publication statusPublished - 1 Jan 2000
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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