Effects of Proton Bombardmemt on CaF₂ Crystals

Abstract

New features were observed in synthetic CaF₂ crystals which were colloidally colored by intense proton bombardmemt. There are (1) a surface of discontinuity at the end of the proton range, (2) a colloidally colored thin layer between the bombarded plane and the range end, and (3) the presence of plane where the dislocations were most decorated. These phenomena were explained to result from the inhomogeneous ionization and heat release during the proton penetration, and the atomic displacements and hydrogen introduction upon stopping of the protons in the crystal.