Chapter XV radiation sensitive and luminescent materials

A series of papers given at a symposium on October 12–14, 1950, at Pocono Manor, form the basis for a book entitled “Imperfections in Nearly Perfect Crystals” (1). This subject has important implications for many aspects of the theory of solids, including electrical and optical properties of ionic crystals, diffusion phenomena, etc. The stimulating discussions accompanying the papers pointedly indicate the state of our knowledge, as well as the existence of major deficiencies. The conference and the book represent a major step toward a better understanding of the solid state.