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26 April 2024

» arxiv » nucl-ex/0609008

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Multi-layer scintillation detector for the MOON double beta decay experiment: Scintillation photon responses studied by a prototype detector MOON-1
H. Nakamura ; P. Doe ; H. Ejiri ; S.R. Elliott ; J. Engel ; M. Finger ; M. Finger. Jr ; K. Fushimi ; V. Gehman ; A. Gorin ; M. Greenfield ; V.H. Hai ; R. Hazama ; K. Higa ; T. Higashiguchi ; K. Ichihara ; Y. Ikegami ; J. Imoto ; H. Ishii ; T. Itahashi ; H. Kaneko ; P. Kavitov ; H. Kawasuso ; V. Kekelidze ; K. Matsuoka ; T. Mizuhashi ; D. Noda ; M. Nomachi ; K. Onishi ; T. Ogama ; A. Para ; R.G.H. Robertson ; M. Sakamoto ; T. Sakiuchi ; Y. Samejima ; Y. Shichijo ; T. Shima ; Y. Shimada ; G. Shirkov ; A. Sissakian ; M. Slunecka ; Y. Sugaya ; A. Titov ; M. Uenoyama ; S. Umehara ; A. Urano ; V. Vatulin ; V. Voronov ; J.F. Wilkerson ; D.I. Will ; K. Yasuda ; S. Yoshida ; M. Yoshihuku ;
Date:	8 Sep 2006
Abstract:	An ensemble of multi-layer scintillators is discussed as an option of the high-sensitivity detector Mo Observatory Of Neutrinos (MOON) for spectroscopic measurements of neutrino-less double beta decays. A prototype detector MOON-1, which consists of 6 layer plastic-scintillator plates, was built to study the sensitivity of the MOON-type detector. The scintillation photon collection and the energy resolution, which are key elements for the high-sensitivity experiments, are found to be 1835+/-30 photo-electrons for 976 keV electrons and sigma = 2.9+/-0.1% (dE/E = 6.8+/-0.3 % in FWHM) at the Qbb ~ 3 MeV region, respectively. The multi-layer plastic-scintillator structure with good energy resolution as well as good background suppression of beta-gamma rays is crucial for the MOON-type detector to achieve the inverted hierarchy neutrino mass sensitivity.
Source:	arXiv, nucl-ex/0609008
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