Knowledge Bank

We have previously reported the observation and analysis of several bands belonging to the OH/D-Ne $A-X$ $systems1.$ These were all associated with the 0 - 0 transitions of OH or OD. More recently, bands associated with the 1 - 0 and 2 - 1 transitions have been observed. Preliminary analyses of these data indicate that the OH/D-Ne interaction is weakly perturbed by vibrational excitation of the O-H/D stretch. Wavelength-resolved fluorescence spectra show that $OH/D(A,v\prime =1)-Ne$ complexes undergo vibrational predissociation. Most of the bands involving excitation of the -Ne stretching motion dissociated to leave the OH/D fragments in specific rotational states (N^{\prime} = 12 for OH: N^{\prime} = 15 for OD). Time-resolved measurements yielded vibrational predissociation rates in the range of $2-7\times 105s-1.$ Lifetime measurements for $OH(A),v\prime -2)-Ne$ indicate that electronic predissociation of OH is inhibited by the presence of the Ne atom. Analyses of the spectroscopic and kinetic data will be presented. Correlations between the predissociations of the complexes and the relaxation dynamics of $OH/D(A)$ isolated in solid Ne will be discussed.