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VELOCITY MODULATED LASER ABSORPTION SPECTROSCOPY OF TiCl⁺: ANALYSIS OF THE [17.9]³ Delta

-(1)³

TRANSITION.

LEONID A. KALEDIN AND MICHAEL C. HEAVEN, Department of Chemistry, Emory University, Atlanta, GA 30322.

The [17.9]³ Delta -(1)³ Delta (0,0) band of TiCl⁺ in the 17400-17500 cm^-1 region has been studied using a dual-beam laser absorption technique. Spectra have been recorded using velocity modulation at the frequency of the discharge (1 f mode) and concentration modulation at the double frequency of the discharge (2 f mode). TiCl⁺ ions were produced in a 1 m long, 10 mm internal diameter glass cell. The discharge was modulated at 25 kHz by a power supply which produced a bipolar sine wave. Principal molecular parameters for the (1)³ Delta state of the ⁴⁸Ti³⁵Cl⁺ isotopomer are:

TABLE

\Lambda-doubling was observed in the (1)³ Delta ₁ component of the (1)³ Delta state. As no (1)³ state has been observed, the parity assignment was arbitrarily chosen such that the e- parity component lies above the f- parity component.

Work supported by AFOSR and the Mission Research Corporation under grant F19628-93-C-0186.