Influence of neutrons and gamma-rays in the Frejus underground laboratory on the NEMO experiment

Citation
C. Marquet et al., Influence of neutrons and gamma-rays in the Frejus underground laboratory on the NEMO experiment, NUCL INST A, 457(3), 2001, pp. 487-498
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
457
Issue
3
Year of publication
2001
Pages
487 - 498
Database
ISI
SICI code
0168-9002(20010121)457:3<487:IONAGI>2.0.ZU;2-T
Abstract
To be sensitive to an effective Majorana neutrino mass, [m(v)], on the orde r of 0.1 eV. the NEMO 3 double beta (beta beta (0v)) decay experiment requi res precise knowledge and control of the backgrounds. The effect of neutron s and gamma -rays from the Frejus 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 l ibrary of gamma -rays from neutron captures are presented. The implied cons equences for the NEMO 3 detector which is under construction are discussed. The neutrinoless double beta decay background induced by neutrons and gamm a -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 magnet ic field, (C) 2001 Elsevier Science B.V. All rights reserved.