Double electron capture of 106Cd in the TGV-2 experiment.

A new experimental run of searching for EC/EC decay of ¹⁰⁶Cd was performed at the Modane underground laboratory (4800 m w.e.) using the TGV-2 spectrometer and ~23.2 g ¹⁰⁶Cd with enrichment of 99.57%. The limit on 2νEC/EC decay of ¹⁰⁶Cd - T_1/2(2νEC/EC) > 3.1×10²⁰ y, at 90% C.L was obtained from the preliminary calculation of experimental data accumulated for 7018 h of measurement. The limits on the resonance neutrino-less double electron capture decay of ¹⁰⁶Cd were obtained from the measurement of ~23.2 g of ¹⁰⁶Cd with the low-background HPGe spectrometer OBELIX lasted 395 h - T_1/2(KL, 2741 keV) > 0.9×10²⁰ y and T_1/2(KK, 2718 keV) > 1.4×10²⁰ y at 90% C.L. [ABSTRACT FROM AUTHOR]