Neutrino-less Double Beta Decay of 48Ca studied by CaF2(Eu) Scintillators
Nuclear Experiment
2008-12-18 v1
Abstract
We searched for the neutrino-less double beta decay(0nbb) of 48Ca by using CaF2(Eu) scintillators. Analysis of their pulse shapes was effective to reduce backgrounds. No events are observed in the Q-value region for the data of 3394 kg days. It gives a lower limit (90% confidence level) of T > 2.7 x 10^22 year for the half life of 0nbb of 48Ca. Combined with our previous data for 1553 kg days, we obtained more stringent limit of T > 5.8 x 10^22 year.
Keywords
Cite
@article{arxiv.0810.4746,
title = {Neutrino-less Double Beta Decay of 48Ca studied by CaF2(Eu) Scintillators},
author = {S. Umehara and T. Kishimoto and I. Ogawa and R. Hazama and H. Miyawaki and S. Yoshida and K. Matsuoka and K. Kishimoto and A. Katsuki and H. Sakai and D. Yokoyama and K. Mukaida and S. Tomii and Y. Tatewaki and T. Kobayashi and A. Yanagisawa},
journal= {arXiv preprint arXiv:0810.4746},
year = {2008}
}
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