Microwave spectrum of the FS2 radical in the ground electronic X̃ 2A″ state

Jian Tang, Shuji Saito

Research output: Contribution to journalArticle

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Abstract

The FS2 radical has been detected in the glow discharge of the SF6 gas by microwave spectroscopy. Both a-type and b-type rotational transitions with the fine and hyperfine structure were observed in the millimeter-wave range of 120-185 GHz. The least-squares analysis for the 440 line frequencies led to the determination of the rotational constants, the centrifugal distortion constants, the spin-rotation interaction constants with the centrifugal distortion corrections, and the hyperfine interaction constants. Especially, the off-diagonal constants (εabba)/2 and Tab were determined in good precision because, some nearly degenerate energy levels were mixed strongly by the off-diagonal spin-rotation interaction, which separated the energy levels up to 3 GHz and even induced the forbidden transitions to be observed strongly. The spin density on the fluorine atom and the chemical bond moments were derived for FS2, and the possible signs of Tab and (εab+ εba)/2 were discussed. The behaviors of the FS2 radical and other related transient species in the SF6-discharge system were compared by using the corresponding rotational transitions observed in the microwave spectra.

Original languageEnglish
Pages (from-to)7437-7443
Number of pages7
JournalThe Journal of Chemical Physics
Volume104
Issue number19
Publication statusPublished - 1996
Externally publishedYes

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microwave spectra
Electron energy levels
Microwave spectroscopy
Microwaves
Fluorine
Chemical bonds
Glow discharges
electronics
Millimeter waves
Gases
Atoms
energy levels
forbidden transitions
interactions
chemical bonds
hyperfine structure
glow discharges
millimeter waves
fluorine
fine structure

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Microwave spectrum of the FS2 radical in the ground electronic X̃ 2A″ state. / Tang, Jian; Saito, Shuji.

In: The Journal of Chemical Physics, Vol. 104, No. 19, 1996, p. 7437-7443.

Research output: Contribution to journalArticle

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