  We present a determination of optical potentials for $^{10}$Be-nucleus
collisions using the double-folding method to compute the real part and
Kramers-Kronig dispersion relations to derive the imaginary part. As
microscopic inputs we use chiral effective field theory nucleon-nucleon
interactions at next-to-next-to-leading order combined with state-of-the-art
nucleonic densities. With these potentials, we compute elastic scattering cross
sections for the exotic nucleus 10 Be off various targets, and compare them to
experiment. Without any fitting parameter, we obtain good agreement with data.
For collisions on light targets, we observe significant uncertainty related to
the short-range physics, whereas for heavy targets that uncertainty remains
small.
