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

N.I. Rukhadze , Ch. Briancon (1) , V.B. Brudanin , G.V. Egorov , L. Fajt , R. Hodak , A.A. Klimenko , A. Kovalik , P. Kouba , F. Piquemal (2) , S.V. Rozov , E. Rukhadze , F. Rychnovsky , A.V. Salamatin , F. Simkovic , Yu.A. Shitov , I. Stekl , V.V. Timkin , E.A. Yakushev

1 CSNSM SNO
2 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

A new experimental run of searching for EC/EC decay of Cd-106 was performed at the Modane underground laboratory (4800 m w.e.) using the TGV-2 spectrometer and similar to 23.2 g Cd-106 with enrichment of 99.57%. The limit on 2 nu EC/EC decay of Cd-106 -T-1/2(2 nu EC/EC) > 3.1x10(20) 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 Cd-106 were obtained from the measurement of similar to 23.2 g of Cd-106 with the low-background HPGe spectrometer OBELIX lasted 395 h -T-1/2(KL, 2741 keV) > 0.9x10(20) y and T-1/2(KK, 2718 keV) > 1.4x10(20) y at 90% C.L.

Mots clés: double beta decay; neutrino

Domaines: Physique [physics]; Physique Nucléaire Expérimentale [nucl-ex]

N.I. Rukhadze, Ch. Briancon, V.B. Brudanin, G.V. Egorov, L. Fajt, et al.. Double electron capture of 106Cd in the TGV-2 experiment. WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX15), Jun 2015, PRAGUE, Czech Republic. pp.020020, ⟨10.1063/1.4934909⟩. ⟨in2p3-01297919⟩