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TAKASHI IMAJO, YUKI KOBAYASHI, YOSHIHIRO NAKASHIMA, KEIICHI TANAKA AND TAKEHIKO TANAKA, Department of Chemistry, Faculty of Science, Kyushu University 33, Hakozaki, Higashi ku, Fukuoka 812-8581, Japan.; , .
High resolution UV emission spectrum of the 407~nm band of the TiF radical was measured by a Fourier transform spectrometer (Bruker IFS120HR) with the resolution of 0.04~cm-1. This band was formerly assigned as the electronic transition 2
- 2
of the TiF radical by Shenyavskaya and Dubov [1], but recent a study of ZrCl[2] suggested that this band might be 4
- X 4
or 4
- X 4
. In the present work a new electronic assignment of 4
- X 4
was proposed. The (0-0) band was rotationally analyzed for each of the 4
5/2 - 4
3/2, 4
7/2 - 4
5/2, 4
9/2 - 4
7/2, and 4
11/2 - 4
9/2 components.
The TiF radical was produced in an ac discharge of He/TiF4. Ultraviolet emission from the discharge was focused onto the input aperture of the FTS. Unwanted emission from the discharge was filtered by an optical interference filter centered at 410~nm with the bandwidth of 10~nm. Total accumulation time was 7~hours.
The band origins, rotational constants, and centrifugal distortion constants were determined by the least squares method. The rotational constants were consistent with those reported by Ram and Bernath [3] within the experimental error. Line intensities of the P- and R- branch lines showed that
=+1, and therefore the upper state was assigned to 4
.
\noindent , 163-172 (1989).
\noindent 2. Ram and Bernath, J. Mol. Spectrosc. 186, 335-348 (1997).
\noindent 3. Ram et al , J. Mol. Spectrosc. 184, 186-201 (1997).