He implantation and concentrations in minerals and lunar regolith particles

Solar-wind erosion of rocks on the lunar surface and the implanting of solar-wind particles in minerals of lunar regolith are principally important processes of space weathering. The latter process leads to the accumulation of inert gases in mineral particles of lunar regolith. Literature data indicate that, depending on the composition and structure of the particles, the concentrations of implanted He in various minerals range within roughly three to four orders of magnitude. The lowest He implantation coefficient was determined in amorphous particles (glass), and very low implantation coefficients were also obtained in experiments on He implantation in glass (obsidian).