Hot atom chemistry of mixed cristals 35 years of research

A historical survey of the author's contribution to the progress of solid state hot atom chemistry including more personal commentaries is presented.Presented at the International Seminar on the Chemistry of High Energy Atoms, Tokyo Institute of Technology, Ookayama, Meguro-ko, Tokyo 152, Japan, October 28–30, 1992, organised by T. MATSUURA, Institute for Atomic Energy, Rikkyo University, Nagasaka, Yokosuka 240-01, co-editor of the Handbook of Hot Atom Chemistry. I thank Professor MATSUURA for the permission to publish my contribution to the seminar slightly modified compared with the version submitted in the seminar proceedings.