  Context. Globular clusters are considered key objects for understanding the
formation and evolution of the Milky Way. In this sense, their characterisation
in terms of their chemical and orbital parameters can provide constraints to
the chemical evolution models of the Galaxy. Aims. We use the heavy element
abundances of globular clusters to trace their overall behaviour in the Galaxy,
aiming to analyse potential relations between the hot H-burning and s-process
elements. Methods. We measured the content of Cu I and s- and r-process
elements (Y II, Ba II, La II, and Eu II) in a sample of 210 giant stars in 18
Galactic Globular Clusters from high-quality UVES spectra. The clusters span a
large metallicity range, and the sample is the largest uniformly analysed for
what concerns heavy elements in Globular Clusters. Results. Cu abundances did
not show considerable spread in the sample nor correlation with Na, meaning
that the Na nucleosynthesis process does not affect the Cu abundance. Most GCs
closely follow the Cu, Y, Ba, La, and Eu field stars' distribution, revealing a
similar chemical evolution. The Y abundances in mid-metallicity regime GCs
(-1.10 dex <[Fe/H]<-1.80 dex) display a mildly significant correlation with the
Na abundance, which should be further investigated. Finally, we did not find
any significant difference between the n-capture abundances among GCs with
Galactic and extragalactic origin.
