FOURIER TRANSFORM SPECTRA OF THE $A^{2}\Pi - X^{2}\Sigma^{+}$ TRANSITION OF MgBr NEAR 380 NM

Hirao, T.; Bernath, P. F.

FOURIER TRANSFORM SPECTRA OF THE $A^{2}\Pi - X^{2}\Sigma^{+}$ TRANSITION OF MgBr NEAR 380 NM

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1999-MJ-01.jpg (95.71 KB)

Date

1999

Authors

Hirao, T.

Bernath, P. F.

Publisher

Ohio State University

Abstract

It is well-known that the $A 2 Π$ state of the magnesium monohalide radicals $(M g X, X = F, C l, B r, I)$ are predissociated. Spectroscopic results of this predissociation are available, however, only for MgF and MgCl. In this study, the high-resolution emission spectra of the gascous magnesium bromide (MgBr) radical have been detected. The spectra of MgBr were recorded by using Bruker IFS120HR Fourier transform spectrometer, modified to record double-sided interferograms. The MgBr radical was generated in the microwave discharge of Ar buffer gas (1.5 Torr) with a trace of the vaporized $M g B r 2$ salt. The vapor of the $M g B r 2$ salt was obtained in a quartz tube heated to about $400 ∘ C$ with a heating tape. The (0,0) and (1,1) vibrational bands for the $A 2 I I 1 / 2 − X 2 Σ +$ were clearly identified near 380 nm, but only the (0,0) sub-band for the $A 2 I I 3 / 2 − X 2 Σ −$ was detected, probably due to a predissociation. The assignment is in progress.

Description

Author Institution: Centre of Molecular Beam and Laser Chemistry, Department of Chemistry, University of Waterloo

URI

http://hdl.handle.net/1811/19294

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999

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