Abstract
A photoacoustic gas spectrometer using a wave-guide CO2 laser, tunable over 500-MHz windows in 70 lines, is described. The spectrometer is used for mapping Doppler-limited spectral signatures of ethylene and for measuring pressure-broadening rates for collisions with N2, Ar, and He. A total of 41 observed transitions are assigned to the v7, v10, and v4 bands of normal ethylene and to the v7 band of the 13C12CH4 isotopomer.
© 1992 Optical Society of America
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