Investigations of 2β decay of 106Cd and 58Ni with HPGe spectrometer OBELIX

Investigations of double beta decay processes to excited states of daughter nuclei were performed at the Modane underground laboratory (LSM, France, 4800 m w.e.) using the high sensitivity spectrometer OBELIX [1], which is a common activity of JINR Dubna, IEAP CTU in Prague and LSM. The spectrometer is based on the HPGe detector with the sensitive volume of 600 cm(3) and relative efficiency of 160%. Investigation of resonant neutrino-less double electron capture of Cd-106 was performed with similar to 23.2 g of Cd-106 (enrichment of 99.57%) during similar to 17 days. The experiment with natural Ni (similar to 21.7 kg of mass) was also carried out during similar to 47 days.. The preliminary experimental limits for 0 nu EC/EC resonant decay to the excited states of Pd-106 and different modes of beta beta decay Ni-58 are presented.