Radon-induced surface contaminations in neutrinoless double beta decay and dark matter experiments / Luca Pattavina ; sous la direction de Ezio Previtali et de Corinne Augier

Date :

Type : Livre / Book

Type : Thèse / Thesis

Langue / Language : anglais / English

Catalogue Worldcat

Matière sombre (astronomie)

Radon

Désintégration bêta double

Classification Dewey : 530

Previtali , Ezio (19..-....) (Directeur de thèse / thesis advisor)

Augier, Corinne (Directeur de thèse / thesis advisor)

Ragazzi , Stefano (Président du jury de soutenance / praeses)

Piquemal, Fabrice (Rapporteur de la thèse / thesis reporter)

Bucci, Carlo Alberto (19..-....) (Rapporteur de la thèse / thesis reporter)

Ille, Bernard (19..-....) (Membre du jury / opponent)

Université Claude Bernard (Lyon) (Organisme de soutenance / degree-grantor)

Università degli studi di Milano - Bicocca (Organisme de cotutelle / degree co-grantor)

École doctorale de Physique et Astrophysique de Lyon (Ecole doctorale associée à la thèse / doctoral school)

Institut de Physique Nucléaire de Lyon (Laboratoire associé à la thèse / thesis associated laboratory)

Résumé / Abstract : Pas de résumé en français

Résumé / Abstract : In experiments looking for rare events, like neutrinoless double beta decay (DBD0v) and dark matter search (DM), one of the main issues is to increase the experimental sensitivity through the material selection and production. In the specific the background contribution coming from the materials used for the detector realization has to be minimized. Moreover the net reduction of the background produced by the bulk part of the apparatus has raised concerns about the background contribution coming from the surfaces. Many procedures and techniques were developed during the last years in order to remove and to minimize the presence of possible contaminants on detector surfaces. To succeed in this strategy a big effort was put in defining all possible mechanisms that lead to surface contaminations, as well as specific cleaning procedures, which are able to reduce and control the surface radioactivity. The presence in air and gases of possible radioactive elements that can stick on the detector surfaces can lead to a recontamination process that will vanish all the applied cleaning procedures. Here is presented and analyzed the contribution to the background of rare events experiments like CUORE (DBD0v) and EDELWEISS (DM) produced by an exposure of their detector components to a big activity of 222Rn, radioactive daughter isotope from the 238U chain