OBSERVATION OF LOW J TRANSITIONS OF LASER ABLATED ALKALI HALIDES
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Date
2011
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Publisher
Ohio State University
Abstract
Pulsed nozzle Fourier transform microwave spectroscopy has been used to observe low J transitions (J = 1 $\leftarrow$ 0 and J = 2 $\leftarrow$ 1) of several alkali halides produced by 532 nm laser ablation of pressed pellets. Spectra were readily located using predictions based on literature constants derived from higher J transitions but improvements of 10 to 100 kHz in spectral line positions are obtained. The additional accuracy could prove useful for astrophysical identification. The $^{41}$K isotopologue of KBr has been observed for the first time. Ablation of a mixed pellet of KCl and NaBr produces spectra of NaCl, indicating exchange between species produced by the ablation event. Aspects of the new experimental apparatus will be reported.
Description
Author Institution: Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, MN 55455; Institut fur Physikalische Chemie und Elektrochemie, Gottfried-Wilhelm-Leibniz-Universitat Hannover, Callinstrasse 3A, 30167 Hannover, Germany