THE PURE ROTATIONAL SPECTRA OF TIO(X-3-DELTA) AND TIN(X-2-SIGMA(+))

The pure rotational transitions in the 220-460 GHz spectral range of T iO (X(3)Delta(r)) and TiN(X(2)Sigma(+)) have been observed using a sou rce-modulated submillimeter-wave spectrometer. In addition, the two lo west rotational transitions of TiO at 63 and 94 GHz have been observed using molecular beam pump/probe microwave optical double resonance (P PMODR) technique. An improved set of spectroscopic parameters for TiO( X(3)Delta) was generated by combining the new PPMODR and submillimeter -wave absorption measurements. Similarly, an improved set of spectrosc opic parameters for TiN(X(2)Sigma(+)) was generated by combining the n ew submillimeter-wave absorption measurements with the previously reco rded PPMODR measurements (D. A. Fletcher, C. T. Scurlock, K. Y. Jung, and T. C. Steimle, 1993, J. Chem. Phys. 99, 4288). The determined h-ty pe doubling parameter for the TiO(X-3 Delta) is compared with the theo retical model. (C) 1998 Academic Press.