The Initial Effect of Molecular Radiation Biology

This is the typical presentation of the course in which molecules absorb the energy of radistion and, through complicated time-course phenomena, are led to visible biologic death, or to exerting genetic effect. They go through physicsl, physicochemical, chemical, and biologic stages. Various phenomena in the stages prior to the biologic one as the initial process of the effect of molecular radiation biology are reviewed. First, in the physical process, energy is absorbed by substances where ionized and excited molecules are formed. Second, in the physicochemical process, the ionized and excited molecules formed in