G2C2 - IV: A novel approach to study the radial distributions of
  multiple populations in Galactic globular clusters
  We use the HB morphology of 48 Galactic GCs to study the radial distributions
of the different stellar populations known to exist in globular clusters.
Assuming that the (extremely) blue HB stars correspond to stars enriched in
Helium and light elements, we compare the radial distributions of stars
selected according to colour on the HB to trace the distribution of the
secondary stellar populations in globular clusters. Unlike other cases, our
data show that the populations are well mixed in 80% of the cases studied. This
provides some constraints on the mechanisms proposed to pollute the
interstellar medium in young globular clusters.
