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Cadmium tungstate crystal scintillators enriched in $^{116}$Cd to 82%($^{116}$CdWO$_4$, total mass of $\approx$1.2 kg) are used to search for2$\beta$ decay of $^{116}$Cd deep underground at the Gran Sasso NationalLaboratory of the INFN (Italy). The radioactive contamination of the$^{116}$CdWO$_4$ crystals has been studied carefully to reconstruct thebackground of the detector. The measured half-life of $^{116}$Cd relatively to2$\nu$2$\beta$ decay is $T^{2\nu2\beta}_{1/2}$ = [2.8 $\pm$ 0.05(stat.) $\pm$0.4(syst.)] $\times$ 10$^{19}$ yr, in agreement with the results of previousexperiments. The obtained limit on the 0$\nu$2$\beta$ decay of $^{116}$Cd(considering the data of the last 8696 h run with an advanced background0.12(2) counts/yr/kg/keV in the energy interval 2.7-2.9 MeV) is $T_{1/2} \ge1.0 \times 10^{23}$ yr at 90% C.L. The sensitivity of the experiment to the$0\nu2\beta$ process is $\lim T_{1/2} = 3 \times 10^{23}$ yr at 90% C.L. over 5years of the measurements and it can be advanced (by further reduction of thebackground by a factor 3-30) to the level of $\lim T_{1/2} = (0.5-1.5) \times10^{24}$ yr for the same period of the data taking.

Search for 2{\beta} decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators