DEVELOPMENT OF BROAD RANGE SCAN CAPABILITIES WITH JET COOLED CAVITY RINGDOWN SPECTROSCOPY
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Date
2011
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Publisher
Ohio State University
Abstract
We have developed a technique for obtaining broad scans, $>$100 cm$^{-1}$, for jet cooled cavity ringdown spectroscopy $($CRDS$)$ spectra. Previously the scans of the jet cooled, CRDS apparatus were limited to $<$10 cm$^{-1}$ due to the use of a narrow linewidth radiation source. However, by coupling our jet cooled, CRDS apparatus with a moderate resolution~($\simeq$ 0.05 cm$^{-1}$) dye laser we are able to greatly increase our rate of data acquisition thereby gaining the capability to perform broad spectral surveys of jet cooled molecules. As a test of the capabilities of the technique we have scanned the $\tilde{A}$--$\tilde{X}$ transition of NO$_3$ previously reported by Deev \emph{et al.} at room temperature. We believe that this will be a very useful technique to search for transitions of cold molecules whose frequencies are not well known and which later can be studied using high resolution methods.
Description
Author Institution: Laser Spectroscopy Facility, The Ohio State University, Columbus, Ohio 43210