The molecular polarisation of compressed non-polar gases

Melting transition of two-dimensional crystals

“…It follows from this that the perturbation theory for the calculation of S(n,, T) = B~n, + qn~ + O(n~) can be patterned according to the theory developed by De Boer et al 13 We have to point out, however, that we did not prove that the general expression for the instability condition K' =O has to have the form of Eq. (20).…”

Some remarks on the theory of the dielectric constant of non-polar dense gases

“…The condition (6) in this case leads to a frequency zero, while for a negative value of 1 + ~x2v (for some v) the oscillator model is seen to break down. In view of the situation discussed above one may ask: what are the eigenvalues 2~ of the matrix J'?…”

“…For instance an exact evaluation of the c~ 2 term would require knowledge of the 3-particle, as well as of the 2-particle molecular distribution function. De Boer et al 6) have approximately evaluated the c~ 2 term in the case of a Lennard-Jones interaction between the atoms by expanding it into powers of the density o and computing the terms o and 9 2 numerically. The 2-and 3-particle distribution functions are accurately known to this order in the density.…”

Étude théorique de la largeur spectrale de la partie dépolarisée du rayonnement diffusé par un gaz rare comprimé

“…Theimer [9] introduisit la structure de l'atome et l'inhomog6n6it6 du champ polarisant. Sans chercher fi atteindre le degr6 de rigueur des expos6s [6] et [7], nous nous sommes toutefois efforc6 [10][11][12] d'aboutir hun calcul du taux de d6polarisation plus 6labor6 que celui de la r6f6rence [8] L'influence des modifications de polarisabilit6 avec l'environnement a dt6 l'objet de nombreuses dtudes [13][14][15][16]. Ces calculs ont dtd surtout ddveloppds pour prdciser la partie isotropique de la polarisabilitd.…”