非表示:
キーワード:
-
要旨:
BOREXINO and GERDA are experiments which require an ultra-low background. The first one is a large scale, real-time liquid scintillation detector for low energy solar neutrinos, where only a few tens of events per day are expected. GERDA will look for the neutrinoless double decay of 76Ge. To minimize the background bare germanium crystals (enriched up to 86% in 76Ge) will be operated in ultra-pure liquid nitrogen or liquid argon.
