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Search for double beta decay of Cd-106 in the TGV-2 experiment

Author
Rukhadze N.I. JINR
Brudanin V.B. JINR
Bakalyarov A.M. RRC Kurchatov Institute
Briancon Ch. CSNSM Orsay
Vylov Ts. JINR
Egorov V.G. JINR
Zhukov S.V. RRC Kurchatov Institute
Zinatulina D.R. JINR
Klimenko A.A. JINR
Kovalík Alojz, Ing. DrSc. Nuclear Physics Institute of the ASCR, JINR Dubna
Lebedev V.I. RRC Kurchatov Institute
Timkin V.V. JINR
Čermák Pavel, Ing. Ph.D. Institute of Experimental and Applied Physics CTU
Štekl Ivan, doc. Ing. CSc. Institute of Experimental and Applied Physics CTU
Shitov Yu. A. JINR

Year
2010

Scientific journal
Bulletin of the Russian Academy of Sciences: Physics, 74 (6), 821-824

Web


Abstract
An investigation of double beta decay (β+β+, β+/EC, EC/EC) of 106Cd was performed at the Modane underground laboratory (at a water equivalent depth of 4800 m) using a TGV-2 spectrometer with 32 detectors. Evaluation of the experimental data accumulated over 12 400 h of measuring ∼13.6 g of 106Cd with an enrichment of 75% was performed. New limits (at a confidence level of 90%) on the half-lives of the 0νEC/EC resonant decay of 106Cd to the 2741 keV excited state of 106Pd − T 1/2 ≥ 1.5 × 1020 y and on 2νEC/EC decay to the ground state of 106Pd (0+ → 0+, g.s.) − T 1/2 ≥ 3.9 × 1020 y were obtained. The limits of the 2νEC/EC decay of 106Cd to the 2+, 512 keV and 0 1 + , 1334 keV excited states of 106Pd and 2νβ+β+- and the 2νβ+ EC decays of 106Cd to the ground and excited states of 106Pd were improved.

Cite article as:
N. Rukhadze, V. Brudanin, A. Bakalyarov, C. Briancon, T. Vylov, V. Egorov, S. Zhukov, D. Zinatulina, A. Klimenko, A. Kovalík, V. Lebedev, V. Timkin, P. Čermák, I. Štekl, Y. Shitov, "Search for double beta decay of Cd-106 in the TGV-2 experiment", Bulletin of the Russian Academy of Sciences: Physics, 74 (6), 821-824 (2010)