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A search for the double beta decay of zinc and tungsten isotopes has beenperformed with the help of radiopure ZnWO4 crystal scintillators (0.1-0.7 kg)at the Gran Sasso National Laboratories of the INFN. The total exposure of thelow background measurements is 0.529 kg yr. New improved half-life limits onthe double beta decay modes of 64Zn, 70Zn, 180W, and 186W have been establishedat the level of 10^{18}-10^{21} yr. In particular, limits on double electroncapture and electron capture with positron emission in 64Zn have been set:T_{1/2}(2\nu 2K) > 1.1 10^{19} yr, T_{1/2} (0\nu 2\epsilon) > 3.2 10^{20} yr,T_{1/2} (2\nu \epsilon \beta^+) > 9.4 10^{20} yr, and T_{1/2} (0\nu \epsilon\beta^+) > 8.5 10^{20} yr, all at 90% C.L. Resonant neutrinoless doubleelectron capture in 180W has been restricted on the level of T_{1/2} (0\nu2\epsilon) > 1.3 10^{18} yr. A new half-life limit on alpha transition of 183Wto the metastable excited level 1/2^- 375 keV of 179Hf has been established:T_{1/2} > 6.7 10^{20} yr.

Final results of an experiment to search for 2beta processes in zinc and tungsten with the help of radiopure ZnWO4 crystal scintillators