HIGH-RESOLUTION ELECTRONIC SPECTROSCOPY OF THE NE-CENTER-DOT-OH AND NE-CENTER-DOT-OD (A)OVER-TILDE[-(X)OVER-TILDE BANDS

The high-resolution laser-induced fluorescence spectra of the Ne.OH (A ) over tilde (0, 1(1), 1) <-- (X) over tilde (0, 0(0), 0) and Ne.OD (A ) over tilde (0, 0(0), 0) <-- (X) over tilde (0, 0(0), 0), (A) over ti lde (0, 0(0), 1) <-- (X) over tilde (0, 0(0), 0), (A) over tilde (0, 1 (0), 1) <-- (X) over tilde (0, 0(0), 0), (A) over tilde (0, 1(1), 1) < -- (X) over tilde (0, 0(0), 0), transitions were obtained. Analyses of these spectra determine precise bond lengths and reveal interesting s pin-rotation and parity structure. In the (A) over tilde (0, 1(K=0,1), 1) levels of Ne.OH and Ne.OD, the spin-rotation structure is described with the parameter gamma, whose magnitude is larger than in the other observed levels of Ne.OH, Ne.OD, and Ar.OH, and Ar.OD. For the K = 1 level an additional term kappa is introduced and is found to be an ord er of magnitude larger than gamma. A model based on perturbation theor y is proposed and successfully explains the peculiar spin-rotation str ucture in the (A) over tilde (0, 1(K), 1) levels. In addition, a parit y-splitting (P-type doubling) for the (X) over tilde (0, 0(0), 0) leve l of Ne.OD was determined to be a factor of 10 larger than that in Ar. OD. The parity splitting (K-type doubling) for the (A) over tilde (0, 1(1), 1) level of Ne.OH is also observed and measured.