In:
Journal of Physics: Conference Series, IOP Publishing, Vol. 1468, No. 1 ( 2020-02-01), p. 012132-
Abstract:
CANDLES(CAlcium fluoride for the study of Neutrinos and Dark matters by Low Energy Spectrometer) is the experiment to search for the neutrino-less double beta decay(0 vββ ) of 48 Ca with CaF 2 scintillator. 48 Ca has the highest Q ββ -value (4.3 MeV) among all isotope candidates for 0 vββ . It enables us to measure signals with very low background condition. After rejection analysis with 131 days × 86 kg data for background events from radioactive contaminations in the CaF 2 scintillators, no events are observed in the Q ββ -value region. As a result, the half-life of 48 Ca is greater than 6.2 × 10 22 yr (90% confidence level). For further high sensitive measurement of 48 Ca 0 vββ search, we have been developing the 48 Ca enrichment and CaF 2 scintillating bolometer techniques. In this paper, the latest result for CANDLES and the status of scintillating bolometer development are described.
Type of Medium:
Online Resource
ISSN:
1742-6588
,
1742-6596
DOI:
10.1088/1742-6596/1468/1/012132
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2020
detail.hit.zdb_id:
2166409-2
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