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Zinc in stars is an important reference element because it is a proxy to Fein studies of damped Lyman-alpha systems, permitting a comparison of chemicalevolution histories of bulge stellar populations and DLAs. In terms ofnucleosynthesis, it behaves as an alpha element because it is enhanced inmetal-poor stars. The aim of this work is to derive the iron-peak element Znabundances in 56 bulge giants from high resolution spectra. These results arecompared with data from other bulge samples, as well as from disk and halostars, and damped Lyman-alpha systems, in order to better understand thechemical evolution in these environments. High-resolution spectra were obtainedusing FLAMES+UVES on the Very Large Telescope. We find [Zn/Fe]=+0.24+-0.02 inthe range -1.3 < [Fe/H] < -0.5 and [Zn/Fe]=+0.06+-0.02 in the range -0.5 <[Fe/H] < -0.1, whereas for [Fe/H] > -0.1, it shows a spread of -0.60 < [Zn/Fe]< +0.15, with most of these stars having low [Zn/Fe]<0.0. These low zincabundances at the high metallicity end of the bulge define a decreasing trendin [Zn/Fe] with increasing metallicities. A comparison with Zn abundances inDLA systems is presented, where a dust-depletion correction was applied forboth Zn and Fe. Finally, we present a chemical evolution model of Zn enrichmentin massive spheroids, representing a typical classical bulge.

Zinc abundances in Galactic bulge field red giants: implications for DLA systems