15min:

COLAN LINTON, Centre for Laser Atomic and Molecular Sciences and Physics Department, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; SARAH FREY AND TIMOTHY C. STEIMLE, Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604.

A gas phase study of the ⁴ _2.5 - A⁴ _1.5 (0, 0) band in the astrophysically important titanium hydride molecule, TiH, has recently been undertaken. Low resolution dispersed fluorescence spectra of TiH and TiD have yielded information on the vibrational structure. A high resolution study at a linewidth of ~40 MHz has shown doubling due to resolved hydrogen hyperfine structure in the main ⁴⁸TiH (74% abundance) isotopologue, and the much weaker ⁴⁶TiH (8%) and ⁵⁰TiH (5%) species. Titanium hyperfine structure was also resolved in the weak ⁴⁷TiH (8%, I = 2.5) and ⁴⁹TiH (5%, I = 3.5) isotopologues. The magnetic tuning properties of TiH have been examined by studying the Zeeman effect on the low-J lines. The analysis is presently in progress and the latest results will be presented at the symposium.