  Globular clusters contain multiple stellar populations, with some previous
generation of stars polluting the current stars with heavier elements.
Understanding the history of globular clusters is helpful in understanding how
galaxies merged and evolved and therefore constraining the site or sites of
this historic pollution is a priority. The acceptable temperature and density
conditions of these polluting sites depend on critical reaction rates. In this
paper, three experimental studies helping to constrain astrophysically
important reaction rates are briefly discussed.
