1. Status of activities of the WP4 on Radiopurity of Materials Pia Loaiza Laboratoire Souterrain de Modane JRA1 meeting Paris February 20 th, 2007

2. http://radiopurity.in2p3.fr The database is stored in a dedicated server of the Centre de Calcul de Lyon. It is built using MySQL system combined with php scripts which allow to communicate from the web page to the database. Database on radiopurity of materials A reminder: WP4-Pia Loaiza, Feb. 2007 Measurements from gamma spectroscopy ICPMS Neutron activation analysis Radon emanation

3. WP4-Pia Loaiza, Feb. 2007 Between 1- 4 October 2006 the 2 nd Topical Workshop In Low Radioactivity Techniques was held in Aussois. Low background screening facilities Radio-isotopes of concern in low background detectors: Pb/Bi/Po-210, Xe,Kr,Ar Radon reduction Neutron backgrounds Application in other disciplines Topics: Proceedings to be published by AIP Conference Proceedings

4. Milestones for third year

5. Articles included in the LRT Proceedings by ILIAS people: Low Background Gamma-Ray Spectrometry in the ‘Laboratoire Souterrain de Modane’ Ph. Hubert and F. Hubert The BiPo detector for ultralow radioactivity measurements M. Bongrand A Comparison of Low-level Gamma-spectrometers within the GERDA Collaboration…..? D. Budj áš et al Radon reduction and radon monitoring in the NEMO experiment A. Nachab and NEMO Col. Surface events identification in the EDELWEISS Germanium bolometers X. F Navick Copper electroforming at the Canfranc Underground Laboratory. Status Report S. Borjabad et al Background reduction for Germanium Double Beta Decay Experiments H. Gomez et al Background studies for the pn-CCD detector of CAST A. Rodríguez et al Muon-induced signals and isotope production in the GERDA experiment L. Pandola et al Radon by Gregorz, Hardy, copper surfaces by Marcin? Surface events in CUORE?