  Globular clusters have been widely studied in terms of light element
variations present in their different stellar populations. However, the nature
of the polluter(s) responsible for this phenomenon is still debated. The study
of heavy elements and their relation to light ones can provide further
constraints. In particular, we aim to explore the possible contribution of
asymptotic giant branch stars of different stellar masses to the internal
pollution in the cluster. We derive abundances of elements from different
nucleosynthetic chains, such as Na, Mg, Ca, Sc, Cu, Y, and Ba. We did not find
clear relations between the light s-process elements (represented by Y II) or
heavy ones (represented by Ba II) with light elements (Li, Na or Al). This
indicates that the polluter(s) responsible for the Na (Al) or Li production
does not produce large amounts of Y II and Ba II. Furthermore, the comparison
with models discards a possible significant contribution to the cluster
pollution from AGB stars with masses lower than 5M$_{\odot}$. In addition, we
found a potential CH-star in our sample.
