EFFECT OF THE NEON IMPURITY WITH CONCENTR ATIONS EXCEEDING THE LIMIT SOLUBILITY ON THERMAL-CONDUCTIVITY OF SOLID PARAHYDROGEN

Investigation of thermal conductivity of solid solutions of Ne in p-H- 2 with Ne concentrations 1 . 10(-3)-1.3 . 10(-2) in the temperature ra nge 1.5-8 K has been made. For crystals produced by condensation from gaseous phases (without the liquid phase), increase of thermal conduct ivity has been found with increasing Ne concentration. Annealing of sa mples in the pre-melting region led to decrease of thermal conductivit y from that of unannealed crystals obtained from the gaseous phase. Th ermal conductivity of solid solutions obtained by crystallization from liquid appeared to be lower than thermal conductivity of annealed and unannealed samples obtained from the gaseous phase. An attempt is mad e to explain qualitativelly anusual behavior of thermal conductivity o f solid solutions of Ne in p-H-2 with the concentrations of Ne more th an 1 . 10(-4).