Measurement of Sodium-Vapor Density at Very Low Pressures by an Optical Method*
作者： N. Ioli , F. Strumia , A. Moretti
关键词: Doppler effect 、 Analytical chemistry 、 Magnetic field 、 Line (formation) 、 Vapour density 、 Light beam 、 Materials science 、 Attenuation coefficient 、 Spectral line 、 Optics 、 Hyperfine structure
摘要: The density of sodium-saturated vapor has been measured in the range 100°C–180°C. values were obtained by measuring absorption coefficient DI line magnetic scanning. was scanned placing a spectral lamp variable field and filtering out one components emitted D1 line. experimental points have fitted with equation logp = A − B/T + C logT. Together our measurements we considered as well all other available data below 300°C. best A, B, found to be −55.182 40; B 1081.2523; 20.029 33.
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