First bolometric measurement of the two neutrino double beta decay of 100Mo with a ZnMoO4 crystals array

L. Cardani, L. Gironi, N. Ferreiro Iachellini, L. Pattavina, J. W. Beeman, F. Bellini, N. Casali, O. Cremonesi, I. Dafinei, S. Di Domizio, F. Ferroni, E. Galashov, C. Gotti, S. Nagorny, F. Orio, G. Pessina, G. Piperno, S. Pirro, E. Previtali, C. RusconiC. Tomei, M. Vignati

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

25 Цитирования (Scopus)

Аннотация

The large statistics collected during the operation of a ZnMoO4 array, for a total exposure of 1.3kg day of 100Mo, allowed the first bolometric observation of the two neutrino double beta decay of 100Mo. The observed spectrum of each crystal was reconstructed taking into account the different background contributions due to environmental radioactivity and internal contamination. The analysis of coincidences between the crystals allowed the assignment of constraints to the intensity of the different background sources, resulting in a reconstruction of the measured spectrum down to an energy of ∼300keV. The half-life extracted from the data is T1/2 2v= [7.15 ± 0.37 (stat) ± 0.66 (syst)] × 1018 y.

Язык оригиналаанглийский
Номер статьи075204
ЖурналJournal of Physics G: Nuclear and Particle Physics
Том41
Номер выпуска7
DOI
СостояниеОпубликовано - июл 2014

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