Abstract

A high resolution Fourier transform spectrometer has been constructed for working in the far infrared region. After a description of this instrument, its performance in the 10–40 cm−1 spectral region is demonstrated by studying the pure rotational spectra of CH3Cl and CH3Br. A working resolution of 0.05 cm−1 is verified, and isotopic splitting is observed in CH3Br out to 14 cm−1.

© 1974 Optical Society of America

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