Performances of a large mass ZnMoO4 scintillating bolometer for a next generation 0νDBD experiment

The European Physical Journal C

F. Bellini¹  L. Cardani¹  E. Gorello¹  G. Piperno¹  F. Ferroni¹  N. Casali²  L. Gironi³  M. Pavan³  C. Brofferio³  S. S. Nagorny⁴  J. W. Beeman⁵  V. N. Shlegel⁶  E. N. Galashov⁶  S. Di Domizio⁷  E. Previtali⁸  C. Rusconi⁸  S. Pirro⁸  G. Pessina⁸  L. Pattavina⁸  O. Cremonesi⁸  F. Orio⁹  M. Vignati⁹  I. Dafinei⁹  C. Tomei⁹ 

[1] Dipartimento di Fisica, Sapienza Università di Roma, 00185, Rome, Italy;Sezione di Roma, INFN, 00185, Rome, Italy;Dipartimento di Fisica, Università degli studi dell’Aquila, 67100, L’Aquila, Italy;Laboratori Nazionali del Gran Sasso, INFN, 67010, L’Aquila, Italy;Dipartimento di Fisica, Università di Milano-Bicocca, 20126, Milano, Italy;Sezione di Milano Bicocca, INFN, 20126, Milano, Italy;Institute for Nuclear Research, 03680, Kyiv, Ukraine;Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA;Nikolaev Institute of Inorganic Chemistry - SB RAS, 630090, Novosibirsk, Russia;Sezione di Genova, INFN, 16146, Genova, Italy;Sezione di Milano Bicocca, INFN, 20126, Milano, Italy;Sezione di Roma, INFN, 00185, Rome, Italy;

关键词: Discrimination Power;    Neutrinoless Double Beta Decay;    Scintillation Light;    Pulse Shape Discrimination;    Neutron Transmutation Dope;   

DOI  :  10.1140/epjc/s10052-012-2142-7

来源: Springer

【 摘 要 】

We present the performances of a 330 g zinc molybdate (ZnMoO4) crystal working as scintillating bolometer as a possible candidate for a next generation experiment to search for neutrinoless double beta decay of 100Mo. The energy resolution, evaluated at the 2615 keV γ-line of 208Tl, is 6.3 keV FWHM. The internal radioactive contaminations of the ZnMoO4 were evaluated as <6 μBq/kg (228Th) and 27±6 μBq/kg (226Ra). We also present the results of the α vs β/γ discrimination, obtained through the scintillation light as well as through the study of the shape of the thermal signal alone.

【 授权许可】

CC BY