ANALYSIS OF THE HIGH-RESOLUTION MID-INFRARED SPECTRUM OF DEUTERATED WATER CLUSTERS

Author Institution: Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801; Departments of Chemistry and Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801We have obtained rotationally-resolved infrared spectra of fully deuterated water clusters and Ar-D${_2}$O clusters in the D${_2}$O bending region near 1185-1205 cm$^{-1}$ using a continuous-wave cavity ringdown spectrometer (cw-CRDS) with a quantum cascade laser (QCL) light source. These clusters were produced in a continuous supersonic expansion from a 150 $\mu$m x 1 cm slit using argon carrier gas, giving rovibrational transitions with a full width at half maximum of approximately 20 MHz. We will present our assignment of the Ar-D${_2}$O spectra and preliminary analysis of spectra of other clusters (particularly our results for (D${_2}$O)${_2}$)