Method and apparatus for measuring the isotropic radon gas concentration in the atmosphere.

摘要

Apparatus for implementing the method according to Claim 1, characterised in that it consists of a vessel (2) fitted with an inlet pipe (4) and an outlet pipe (8) for the gaseous atmosphere. The inside of the vessel, forming the closed sampling space, is subdivided into a large number of small elementary volumes which communicate with each other to allow the gas sample to become homogeneous, and to allow a spatially homogeneous diffusion and trapping of all the solid daughter products. In this way, the system forms a homogeneous gamma-emitting volume source for the gamma spectrometer system which is used to investigate the source from the outside.