Mixing processes during the evolution of red giants with moderate metal deficiencies : the role of molecular-weight barriers

Corinne Charbonnel, Jeffery A. Brown, George Wallerstein

We have assembled accurate abundance data for Li, C, and N as well as the 12C/13C ratio for five field giants with [Fe/H]=-0.6 including Arcturus and two stars in the globular clus…