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In this letter, we report on our successful systematic search for lines ofelements beyond the Ba-peak in spectra of s-process enriched post-AGB stars.Using newly released atomic data from both the VALD database and the D.R.E.A.M.project, we could derive abundances for several elements heavier than europiumfor three objects, on the base of high quality VLT+UVES spectra. The abundancesof these elements are of particular interest since they turn out to be powerfulconstraints for chemical evolutionary AGB models. Their high abundancesindicate that, also in only moderately metal deficient AGB stars, production oflead is expected to be significant.Comment: 5 pages, 2 figures, accepted for publication as A&A Lette

Detection of elements beyond the Ba-peak in VLT+UVES spectra of post-AGB stars