975 articles – 4377 Notices  [english version]
 HAL : in2p3-00506430, version 1
 arXiv : 1005.0343
 Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 622 (2010) 120-128
 Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils
 SuperNEMO Collaboration(s)
 (2010)
 The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in $^{208}$Tl and $^{214}$Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 $m^2$ of sensitive surface area, has been running in the Modane Underground Laboratory since February, 2008. The goal of BiPo-1 is to measure the different components of the background and in particular the surface radiopurity of the plastic scintillators that make up the detector. The first phase of data collection has been dedicated to the measurement of the radiopurity in $^{208}$Tl. After more than one year of background measurement, a surface activity of the scintillators of $\mathcal{A}$($^{208}$Tl) $=$ 1.5 $\mu$Bq/m$^2$ is reported here. Given this level of background, a larger BiPo detector having 12 m$^2$ of active surface area, is able to qualify the radiopurity of the SuperNEMO selenium double beta decay foils with the required sensitivity of $\mathcal{A}$($^{208}$Tl) $<$ 2 $\mu$Bq/kg (90% C.L.) with a six month measurement.
 équipe(s) de recherche : Intéractions fondamentales
 Thème(s) : Physique/Physique des Hautes Energies - ExpériencePhysique/Physique/Instrumentations et Détecteurs
 Mot(s)-clé(s) : Double beta decay – NEMO-3 – SuperNEMO – BiPo – Majorana neutrino – Radiopurity
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1005.0343
 in2p3-00506430, version 1 http://hal.in2p3.fr/in2p3-00506430 oai:hal.in2p3.fr:in2p3-00506430 Contributeur : Françoise Marechal <> Soumis le : Mardi 27 Juillet 2010, 16:20:05 Dernière modification le : Mercredi 15 Septembre 2010, 09:18:34