出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Many nucleosynthesis and mixing processes of low−mass stars as they evolve from the Main Sequence
to the thermal-pulse Asymptotic Giant Branch phase (TP−AGB) are well understood (although
of course important physics components, e.g. rotation, magnetic fields, gravity wave mixing,
remain poorly known). Nevertheless, in the last years presolar grain measurements with high
resolution have presented new puzzling problems and strong constraints on nucleosynthesis processes
in stars. The goal of the NuGrid collaboration is to present uniform yields for a large range
of masses and metallicities, including low−mass stars and massive stars and their explosions.
Here we present the first calculations of stellar evolution and high−resolution, post−processing
simulations of an AGB star with an initial mass of 2 M⊙ and solar−like metallicity (Z=0.01),
based on the post−processing code PPN. In particular, we analyze the formation and evolution
of the radiative 13C−pocket between the 17th TP and the 18th TP. The s-process nucleosynthesis
profile of a sample of heavy isotopes is also discussed, before the next convective TP occurrence.
