Relative dispersion of the second refractivity virial coefficient of xenon between 633 nm and 325 nm measured for temperatures up to 1100 K
Titel:
Relative dispersion of the second refractivity virial coefficient of xenon between 633 nm and 325 nm measured for temperatures up to 1100 K
Auteur:
HOHM, UWE TRUMPER, ULF
Verschenen in:
Molecular physics
Paginering:
Jaargang 89 (1996) nr. 4 pagina's 943-951
Jaar:
1996-11-01
Inhoud:
We report measurements of the difference of the reduced second refractivity virial coefficient ΔB*(T) = BR(325·13 nm, T)/AR(325·13 nm, T)—BR(632·99 nm, T)/AR(632·99 nm, T) of xenon in the temperature range between 295 K and 1100 K. AR(λ, T) and BR(λ,T) are the first and second refractivity virial coefficients measured at λ = 325·13 nm and λ = 632·99 nm respectively. ΔB*(T) is found to decrease with increasing temperature T as 107Δ;B*(T)/m3 mol-1 = 12·6(6·8) × exp[—0·0038(13) × (T/K)] with a standard deviation of 0·94 × 10-7 m3 mol-1. With the aid of one absolute value of BR(λ, T) and calculations based on an extended dipole-induced-dipole model, a normal dispersion of BR(λ, T) is found throughout the whole temperature range. This result is contrary to former room-temperature measurements, where an anomalous dispersion of BR(λ, T) of xenon has been reported.
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