Status of $^{48}$Ca double beta decay search with CANDLES
Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)(2022)
摘要
We have studied the neutrino-less double beta decay(0) of 48 Ca with the CANDLES III system, which consists of CaF 2 (pure) scintillators.The first result of 48 Ca double beta decay with the CANDLES III system was obtained by using 130.4 days of data.In this measurement, we achieved a background free measurement and a low background condition of 10 -3 events/keV/yr/(kg of nat.Ca).The sensitivity of this measurement, however, was limited by the small amount of 48 Ca.For a more sensitive measurement of 48 Ca 0, we have developed new techniques for 48 Ca enrichment and CaF 2 scintillating bolometer.In this paper, we will also show the current status of these techniques.
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关键词
Double-Beta Decay
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