The dependence of the mean dipole polarizability α(ω,T, ρ) of small molecules in the gas phase on electromagnetic radiation frequency ω, temperature T, and molar density ρ is discussed. Experimental results are presented for the noble gases, the molecular gases H2, N2, O2, CO2, CH4, C(CH3)4, CH3OH, CF2Cl2, and the gas mixture air. Hints to some rather unusual effects concerning α(ω,T, ρ) are given, too. In each case α(ω,T, ρ) was derived from precise interferometric measurements of the refractive index n(ω,T, ρ) of the gas in the visible (VIS) frequency range.
In this contribution we discuss briefly some experimental results of the mean dipole volume polarizability ct(w,T,e) of some small molecules as a function of electromagnetic radiation frequency w (dispersion), temperature T, and molar density @ of the corresponding gases, which should be of interest in physics and chemistry of the atmosphere. Selected gases are the noble gases, the molecular gases H2, N2, 02, C02, CH4, C(CH3)4. CH,OH, CF2CI2, and the gas mixture air. A more detailed discussion including an extended list of references is given elsewhere [I].
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