On the temperature factors of X -ray reflexion for sodium and chlorine in the rock-salt crystal

摘要: 1. The influence of temperature on the intensity reflexion X-rays by crystals was first dealt with theoretically Debye, and later Waller, each whom based their work dynamical theory crystal lattices due to Born Karman. Measurements coefficient for rocksalt at high temperatures have been made James,! liquid air James Miss Firth. In paper, latter compare observed intensities, both low temperatures, those predicted Waller’s theoretical treatment, find, up about 500° Abs., a substantial agreement, although throughout that range diminution is rather less rapid than indicates. Above rate decrease much greater rate. making comparison several simplifying assumptions were which equivalent assuming lattice consist only one kind atom. Now Waller containing more atom shows it necessary consider separate type.