Multilayer scintillator responses for mo observatory of neutrino experiment studied using a prototype detector MOON-1

作者：Nakamur Hidehito^*; Doe Peter J; Ejiri Hiroyasu; Elliott Steven R; Engel Jonathan; Finger Miroslav; Finger Michael Jr; Fushimi Kenichi; Gehman Victor M; Greenfield Mark B; Hai Vo H; Hazama Ryuta; Imaseki Hitoshi; Kavitov Petr; Kekelidze Vladimir D; Kitamura Hisashi; Matsuoka Kenji; Nomachi Masaharu; Ogama Takeo; Para Adam; Robertson R G Hamish; Sakiuchi Takuya; Shima Tatsushi; Slunecka Milos; Shirkov Grigori D; Sissakian Alexei N; Titov Alexander I

来源：Journal of the Physical Society of Japan, 2007, 76(11): 114201.

DOI：10.1143/JPSJ.76.114201

• neutrino mass
• double beta decay
• plastic scintillator
• energy resolution

An ensemble of multilayer scintillators is discussed as an option of the high-sensitivity detector MOON (Mo Observatory of Neutrinos) for spectroscopic measurements of neutrinoless double beta decays. A prototype detector MOON-1, which consists of 6-layer plastic scintillator plates, was built to study the photon responses of the MOON-type detector. The photon responses, i.e., the number of scintillation photons collected and the energy resolution, which are key elements for high-sensitivity experiments, are found to be 1835 +/- 30 photoelectrons for 976 keV electrons and sigma = 2.9 +/- 0.1% (Delta E/E = 6.8 +/- 10.3% in FWHM) at the Q(beta beta) similar to 3 MeV region, respectively. The multilayer plastic scintillator structure with high energy resolution as well as a good signal for the background suppression of beta-gamma rays is crucial for the MOON-type detector to achieve inverted-hierarchy neutrino-mass sensitivity. It will also be useful for medical and other rare-decay experiments as well.

• 出版日期2007-11