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Spectral interpretation of the refractivity and dielectric virial coefficients of atomic gases

✍ Scribed by M.O. Bulanin

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
449 KB
Volume
217
Category
Article
ISSN
0009-2614

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✦ Synopsis

Second electrooptical virial coeffkients are expressed in terms of collision-induced intensity redistribution in absorption spectra of gases. Simple relations are obtained giving explicit frequency dependence of the contributions to the incremental dynamic polarixability due to pressure shift and asymmetric broadening of a single spectral line. The dispersion of the second virial coefficient is shown to be either normal, or reversed (anomalous), depending on the pattern of the absorption cross section redistribution.

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Corrections to the third viri4 coefficient derived from the first-order three-body exchange forces, AC, (71, in helium, neon and argon have been calculated. Inclusion of aC1 and the corrections due to the non-eschaqe three-body forces leads to a satisfactory agreement vdith esperimental data.