Double beta decay of 100Mo |
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| Authors: | V. D. Ashitkov A. S. Barabash S. G. Belogurov G. Carugno S. I. Konovalov F. Massera G. Puglierin R. R. Saakyan V. N. Stekhanov V. I. Umatov |
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| Affiliation: | (1) Institute of Theoretical and Experimental Physics, ul. Bol’shaya Cheremushkinskaya 25, Moscow, 117259, Russia;(2) Dipartimento di Fisica e INFN, Università di Padova, I-35131 Padova, Italy;(3) INFN, Serzione di Bologna, 40126 Bologna, Italy;(4) Laboratory Nazionali del Gran Sasso dell’INFN, I-67010 Assergi (L’Aquila), Italy |
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| Abstract: | Two-neutrino double beta decay of 100Mo with half-life T 1/2=[7.2±0.9(stat)± 1.8(syst)]×1018 yr was detected using a liquid argon ionization chamber. With a C.L. of 68% (90%), the bounds on neutrinoless decay and decay with majoron emission were found to be 8.4(4.9)×1021 and 4.1(3.2)×1020 yr, respectively. An analysis of all available results provides the average “world” value T 1/2=(8.0±0.7)×1018 yr for the two-neutrino decay of 100Mo, and the corresponding nuclear matrix element is M GT=0.118±0.005. |
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