Energy exchange between inert gas atoms and a solid surface

摘要: 1. Introduction . — If gas atoms, having energy corresponding to a temperature T2, are incident on solid surface at T1, then the reflected atoms will have mean some new T2', which is function of T1 and T2. For simplicity it convenient define Knudsen’s thermal accommodation coefficient as α = lim → T2 T T'2 - / The depends nature atom, surface, T. Accommodation coefficients been measured by various workers, present paper an attempt give theoretical explanation results Roberts, who has for helium tungsten temperatures, taking particular precautions obtain clean surface.