The role of radium distribution and porosity in radon emanation from solids

Abstract

Essential features of the grain emanation and aggregation models are presented. The presence of thin layers containing Ra is shown to enhance the Rn emanation from the grains. A multiple α‐recoil mechanism is suggested to create a nonuniform Ra distribution. It is also shown that the rnesoporosity may increase Rn emanation and the macroporosity may contribute to Rn transport.