Double beta decay of 48Ca studied by CaF2(Eu) scintillators

Saori Umehara,T. Kishimoto,Izumi Ogawa,Ryuta Hazama,H. Miyawaki,S. Yoshida, K. Matsuoka,K. Kishimoto,Atsunari Katsuki,Hideyuki Sakai,D. Yokoyama,K. Mukaida,S. Tomii,Y. Tatewaki, T. Kobayashi,A. Yanagisawa

Journal of physics（2008）

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摘要

We report the new limit on the half-life of neutrino-less double beta decay(0νββ) of 48Ca. In order to achieve the background free measurement, measurement of pulse shape was essential. We have observed no event in the Qββ-value region. We set the new limit on 0νββ half-life as T0νββ1/2 > 40 × 1022 year.

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double beta decay

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