Correlativity of nucleosynthesis in low-mass AGB stars

In a self-consistent treatment, an LM-AGB TP model of HHe-burning and no-branch reaction passway for s-process from Fe-Bi with correlative reaction network from C-Ne is used to reproduce the enrichment of F, C and heavy elements in the surface of MS and S stars (with Tc). The growing of the core mass and the mass loss through steller winds are also considered. Comparisons between the computed correlation: {[F/O], C/O}; {[F/O], (s/Ti)} and that of the observations are then presented. It appears that fluorine and heavy elements can be synthesized where the nucleosynthesis events occur in a fit temperature range, and then are dredged up to the surface of the star. Because F production only occurs in a narrow temperature range, the synthesis events are sensitive to temperature. The observation of this case is discussed specially.