Author/Authors :
Marquet، نويسنده , , Ch. and Piquemal، نويسنده , , F. and Arnold، نويسنده , , R. and Augier، نويسنده , , C. and Baker، نويسنده , , J. and Barabash، نويسنده , , A. and Bing، نويسنده , , O. and Blum، نويسنده , , D. and Brudanin، نويسنده , , V. and Caffrey، نويسنده , , J. P. Campagne، نويسنده , , J.E. and Caurier، نويسنده , , E. and Dassie، نويسنده , , D. and Egorov، نويسنده , , V. and Errahmane، نويسنده , , K. and Eschbach، نويسنده , , R. and F، نويسنده ,
Abstract :
To be sensitive to an effective Majorana neutrino mass, 〈mν〉, on the order of 0.1 eV, the NEMO 3 double beta (ββ(0ν)) decay experiment requires precise knowledge and control of the backgrounds. The effect of neutrons and γ-rays from the Fréjus underground laboratory (LSM, Laboratoire Souterrain de Modane) has been studied during 10 700 h of data collection. The data were taken with a NEMO 2 prototype detector using different shield configurations. Monte Carlo calculations with GEANT/MICAP code and a new library of γ-rays from neutron captures are presented. The implied consequences for the NEMO 3 detector which is under construction are discussed. The neutrinoless double beta decay background induced by neutrons and γ-rays within the LSM will be suppressed to the very suitable level of 0.1 event in a live time of five years given the appropriate shield and magnetic field.
Keywords :
Neutron , ?-Ray , Monte Carlo simulation , Background , Double-beta decay
