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New search for double electron capture in Cd-106 decay with the TGV-2 spectrometer

C. Briancon 1 V B. Brudanin V G. Egorov J M. Jose a A. Klimenko A. Kovalik S V. Rosov E N. Rukhadze N I. Rukhadze a V. Salamatin V V. Timkin L. Fajt R. Hodak F. Simkovic y A. Shitov M. Spavorova I. Stekl E A. Yakushev
CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609, CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Abstract : A new experiment devoted to searches for double electron capture in Cd-106 decay is being performed at the Modane underground laboratory (4800 mwe) with the 32-detector TGV-2 spectrometer. The limit T (1/2)(2 nu EC/EC) > 2.0x10(20) yr at a 90%confidence level (C.L.) was obtained from a preliminary analysis of data obtained over 2250 h of measurements with about 23.2 g sample enriched in the isotope Cd-106 to 99.57%. The limits T (1/2)(KL, 2741 keV) > 0.9 x 10(20) yr and T (1/2)(KK, 2718 keV) a parts per thousand << 1.4 x 10(20) yr at a 90% C.L. on the neutrinoless decay of Cd-106 were obtained from measurements performed with the Obelix low-background spectrometer from high-purity germanium (HPGe spectrometer) for a sample of mass about 23.2 g enriched in the isotope Cd-106.
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Submitted on : Friday, October 23, 2015 - 4:45:37 PM
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C. Briancon, V B. Brudanin, V G. Egorov, J M. Jose, a A. Klimenko, et al.. New search for double electron capture in Cd-106 decay with the TGV-2 spectrometer. Physics of Atomic Nuclei / Yadernaya Fizika, MAIK Nauka/Interperiodica, 2015, 78 (issue 6), pp.740-745. ⟨10.1134/S1063778815060058⟩. ⟨in2p3-01220009⟩



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