Cluster approach to formation of nitrogen–rare gas cryoalloys
A.A. Solodovnik, V.V. Danchuk, and N.S. Mysko
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
Received December 28, 2012
Structure of solid binary N2–Kr and N2–Ar solutions were studied by transmission electron diffraction (THEED). The samples were prepared in situ by deposition of gaseous mixture onto an Al substrate cooled to 20 K. The lattice parameters for low concentrations of one of the components were measured. The relative change of the lattice parameter per unit concentration is determined for N2 impurity in Kr and Ar as well as for Kr and Ar in N2. Analysis of the concentration dependence of the lattice parameters for low fractions of both components was performed within a cluster model in the three-particle approximation.
PACS: 78.55.Kz Solid organic materials; PACS: 61.05.J– Electron diffraction and scattering.