Investigation of the Majoron-accompanied double-beta decay mode of 76Ge.

Marcus Beck, F. Bensch, J. Bockholt, G. Heusser, M. Hirsch, Hans Volker Klapdor-Kleingrothaus,Berenike Maier, F. Petry, A. Piepke, H. Strecker, M. Völlinger, K. Zuber, A. Balysh,S. T. Belyaev, A. Demehin, A. Gurov, I. Kondratenko,V. I. Lebedev, Axel H. E. Müller

Physical Review Letters（1993）

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摘要

We have examined the double-beta decay mode accompanied by Majoron emission. After 223 days of measurement corresponding to about 615 kg d or 19.3 mol yr of exposure we find a lower half-life limit for this decay channel of [ital T][sub 1/2][sup 0[nu][chi]][gt]1.66(1.99)[times]10[sup 22] yr [90% (68%) C.L.] yielding a new limit for the Majoron-neutrino coupling of [l angle][ital g][sub [nu][chi]][r angle][lt]1.8[times]10[sup [minus]4] (90% C.L.).

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