CANDLES-III detector: Low-background spectrometer for studying neutrino-less double β decay of 48Ca

Le résumé fourni par la source

The CANDLES-III detector was installed at the Kamioka Observatory in Japan to investigate the double β decay of 48 Ca. This system combines an undoped calcium fluoride scintillator with a long attenuation length (larger than 100 cm), and a two-phase liquid scintillator, thereby serving as a larger-mass detector of 305 kg (contains 350 g of 48 Ca) while maintaining a high energy resolution ( σ = 2 . 6 % at Q -value of 48 Ca double beta decay). Low-background conditions are achieved in the energy region of interest by improving the light yield and collection efficiency of the detector system, allowing to access a high energy resolution, as well as by installing passive and active radiation shielding, and using pulse-shape analysis. This paper describes the details of the detector including its site and data acquisition system and presents its performance characterization.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.