Search for 2 processes in 106Cd with 106CdWO4 crystal scintillator

An experiment to search for double beta decay (2beta) decay of 106Cd with the help of a low background cadmium tungstate crystal scintillator developed from cadmium enriched in 106Cd to 66% (106CdWO4; 215 g) is in progress at the STELLA facility of the GRan Sasso underground Laboratory (INFN, Italy). The 106CdWO4 scintillator is viewed by low background PMTs through a PbWO4 crystal light guide produced from deeply purified archeological lead. The detctor operates in coincidence with the four low background HPGe to search for 2beta processes with the emission of gamma quanta. Sensitivity of the experiment after 10678 h of data taking to different channels of 2beta decay of 106Cd is on the level of limT_{1/2}=10^{19} - 10^{21} yr. In particular the limit on the T_{1/2}(2neutrinosECbeta+)>/=1.3 x 10^{21} yr at 90% C.L. reached the region of theoretical predictions.