III Characteristics of Environmental Gamma Rays and the Exposure Doses

Abstract

This article provides the fundamental information necessary for the appropriate evaluation of exposure doses in the environment. The basic characteristics of environmental γ rays from typical environmental sources are introduced; then, the dose conversion coefficients for the public at different ages are summarized which were obtained from the simulation considering the basic characteristics of environmental γ rays. Further, the variations of environmental exposure doses due to a variety of factors, and the relation of exposure doses to measured air dose rates are discussed.