Low Radioactivity in CANDLES

Journal Article · Thu Sep 08 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2060460· OSTI ID:20719224

Kishimoto, T; Ogawa, I; Hazama, R; Yoshida, S; Umehara, S; Matsuoka, K; Sakai, H; Yokoyama, D; Mukaida, K; Ichihara, K; Tatewaki, Y; Kishimoto, K; Hirano, Y; Yanagisawa, A; Ajimura, S ^[1]

---

1. Department of Physics, Osaka University, Toyonaka, Osaka, 560-0043 (Japan)

CANDLES is the project to search for double beta decay of 48Ca by using CaF2 crystals. Double beta decay of 48Ca has the highest Q value among all nuclei whose double beta decay is energetically allowed. This feature makes the study almost background free and becomes important once the study is limited by the backgrounds. We studied double beta decays of 48Ca by using ELEGANTS VI detector system which features CaF2(Eu) crystals. We gave the best limit on the lifetime of neutrino-less double beta decay of 48Ca although further development is vital to reach the neutrino mass of current interest for which CANDLES is designed. In this article we present how CANDLES can achieve low radioactivity, which is the key for the future double beta decay experiment.

• OSTI ID: 20719224
• Journal Information: AIP Conference Proceedings, Vol. 785, Issue 1; Conference: LRT 2004: Topical workshop on low radioactivity techniques, Sudbury, ON (Canada), 12-14 Dec 2004; Other Information: DOI: 10.1063/1.2060460; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CALCIUM 48
CALCIUM FLUORIDES
CRYSTALS
DOUBLE BETA DECAY
LIFETIME
MASS
NEUTRINOS
Q-VALUE
RADIOACTIVITY