β Scribed by B. Schramm; Ursula Hebgen
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We present expe&ent?l d&t of second virial~coeffidients of a&n at temperatures of 77.3.87.2 and 90.2 K.
The results axe in excelledagreement with theoretical values.
In recent years considerable progress in the determination of the intermolecular potentials of, argon and the other noble gases has been made. Fqr argon some few-parameter potentials are used [l-5] for which calculated and experimental results of second virial coefficients and tratisport properties are in good a~eem~nt. These potktials, however, seem not to be flexible enough in order to describe other measurements as elastic scattering and spectroscopic data. Therefore some m~ti-parameter potential enerm. functions are introduced, which give a satisfactory ,.
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π SIMILAR VOLUMES
Second virid coeffitients for argon are calculated using a pair potentM'det&mined from scattetiigand spcctroswpic data by Parson and Lee. Agreement with experiment is poor. A potential due to Basker, Fisher end Watts agrees about as well as that of Parson and Lee with the scattering and spectroscopi
The Beth-Uhlenbeck formula is rederived using the notion of symmetrized and anti-symmetrized partition function introduced by Lee and Yang. By applying the method of complex angular momentum the summation of the phase shifts appearing in the formula is converted into an integral form. Consequently,
PubIisl~cd rrsuIts of vapour-liquid and vapour-solid equilibriun~ studies for neon-krypton and neon-oxygen mixtures iwe been m;tiysed to give V~IIICS for the interaction second virisi coefficients. 8,~~ Comparisons are made with other results for the Se-Kr system and with the predictions of some pro