The radon is a radioactive noble gas produced in the series of uranium and thorium decay. In particular, the 222Rn isotope, whose decay period is 3.8 days, is one of the largest sources of naturally occurring radiation exposure. In particle and astroparticle physics of very rare and low-energy events like neutrinoless double beta decay and Direct Dark Matter research, the decay of 222Rn (Rn) and its daughters, is often the main sensibility limitation for many experiments. Radon, being a part of the uranium decay series, is found naturally in the air and is produced inside materials, indeed in few quantities, but enough to be the main background for zero background experiment. Therefore, the study of the production of radon by materials (emanation) and the study of radon purification method for gas and liquids are of critical interest.

In this context, the CPPM radon platform is a dedicated platform for the general study of radon physics. We are working in collaboration with zero background, such as DarkSide or SuperNEMO, but also with chemistry laboratory and geology laboratory. In this context, we developed two dynamic adsorption bench to characterize the radon adsorption coefficient of microporous material, from the industry or research laboratory, and we also do dedicated measurement of the emanation of radon from material in different gas and conditions. However, we also work on the development of new methods for the measurement or purification of radon, such as the emanation of materials inside water or liquid noble gas or the removal of radon and other components, such as ethanol inside gas, with the objective of recycling it, or the development of new material for the adsorption of radon inside xenon.