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Selective detection of molecular ions in dc discharges by dual-beam Fourier transform spectroscopy

P. A. Martin and G. Guelachvili

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Abstract

A new method to detect molecular ions selectively in gas discharges by Fourier transform emission spectroscopy is proposed. This method is by dual-beam optical subtraction. The difference spectrum between blue and red Doppler-shifted components is obtained directly thus eliminating the large background that is due to neutral precursors.

© 1996 Optical Society of America

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