Seasonal subsurface heat conduction can have a large influence on Triton’s N, frost distribution. Increasing surface thermal inertia reduces the thickness and extent of seasonal N, frosts. If the thermal inertia of the nonvolatile substrate is greater than about 30% of the value for nonporous Hz0 or CO,, or if nonporous Hz0 or CO, is overlaid by a porous regolith of low thermal inertia but less...

Three stages of thermal and chemical processing of Vycor glass were carried out. Raw material, the glass with small and big pores was studied. In each stage of study various crystallinity degrees of investigated material were obtained. The relation between crystallinity degree and the intensity of o-Ps components was determined. In nonporous material a high correlation between o-Ps intensity an...