Abstract

A small cw mixing laser operating on a single wavelength and tunable over about 400 MHz was used to measure absorption coefficients for HF and DF in the Doppler-broadened region and for HF in the pressure-broadened regime. At low pressure, the line profile was experimentally determined and from measurements at line center, values were obtained for the radiative lifetime of HF and DF of 6.16 × 10<sup>-3</sup> s and 3.13 × 10<sup>-3</sup> s, respectively. High-pressure measurements yielded the value of 1.30 × 10<sup>8</sup> s<sup>-1</sup> torr<sup>-1</sup> for the HF optical-broadening collision frequency.

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