DISCHARGE MODULATION TECHNIQUE FOR DETECTION OF CARBON CHAIN IONS IN THE GAS PHASE BY FREQUENCY MODULATION ABSORPTION SPECTROSCOPY

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1999

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Ohio State University

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A technique combining discharge modulation with frequency modulation absorption experiments has been developed for the sensitive detection of electronic spectra of carbon chain cations generated in a liquid-nitrogen cooled hollow $cathode.^{a}$ The rotationally resolved spectra of the $A^{2}\Pi\leftarrow X^{2}\Pi 0_{0}^{0}$ transitions of polyacetylene and cyanopolyacetylene cations have been obtained at Doppler limited resolution using this technique. The double modulation technique has been extended to the detection of species generated in a pulsed supersonic jet and preliminary results will also be presented.

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$^{a}$W.E. Sinclair, D. Pfluger, H. Linnartz and J.P. Maier, J. Chem. Phys. 110, 296, (1999).
Author Institution: Institute of Physical Chemistry, University of Basel

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http://hdl.handle.net/1811/19500

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999