The new technique of Wampler and Gentry for determining the temperature and density of a gas by measuring UV gas absorption at two wavelengths [ WamplerF. B. GentryR. A., J. Appl. Phys. 52, 1583 1981)] has been applied to gaseous UF6. At 266 nm the absorption cross section σ of UF6 appears to be constant, σ = (1.15 ± 0.01) 10−18 cm2 from 0–100°C. The absorption cross section at 245 nm over the same temperature range may be represented with the empirical polynomial σ = [1.37 ± 0.05 + (9.7 ± 1.5) 10−3 ⋅ T − (4.2 ± 1.1)10−5 ⋅ T2] 10−18 cm2, where T is in degrees Celsius. Differences in (dσ/dT)λ at 266 and 245 nm allow both UF6 temperature and density to be determined by UV absorption measurements. The strengths and limitations of this technique are discussed.
© 1981 Optical Society of America
Original Manuscript: March 9, 1981
Published: August 1, 1981
W. W. Rice, R. C. Oldenborg, F. B. Wampler, and J. J. Tiee, "Gas temperature and density of UF6 determined by two-wavelength UV absorption," Appl. Opt. 20, 2625-2629 (1981)