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New limits on double beta decay of 106Cd

Abstract : Investigation of double electron capture in 106Cd was performed at the Modane underground laboratory (4800 m.w.e.) using the multi-detector spectrometer TGV-2. In Phase I of the experiment, ∼10 g of 106Cd with an enrichment of 75% was measured during 8687 hours. In Phase II, the TGV-2 background was significantly suppressed in comparison with Phase I and the 106Cd mass was increased to ∼13.6 g. New half-life limits (at 90% CL) were obtained for 2νEC/EC decay of 106Cd to the ground state of 106Pd - T1/2 > 3.0 × 1020 y (Phase I) and T1/2 > 3.6 × 1020 y (Phase II, 9000 hours), and for 0νEC/EC decay of 106Cd to the 2741 keV excited state of 106Pd - T1/2 > 1.1×1020 y (Phase II).
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Submitted on : Friday, April 15, 2011 - 10:39:36 AM
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N.I. Rukhadze, A.M. Bakalyarov, Ch. Briançon, V.B Brudanin, P. Čermák, et al.. New limits on double beta decay of 106Cd. Nuclear Physics A, Elsevier, 2011, 852, pp.197-206. ⟨10.1016/j.nuclphysa.2011.01.006⟩. ⟨in2p3-00586055⟩



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