Nuclear Physics in Astrophysics - X

The γ-process nucleosynthesis in core-collapse supernovae

6 Sept 2022, 18:00

3h

61/1-201 - Pas perdus - Not a meeting room - (CERN)

Poster Poster session

Speaker

Lorenzo Roberti (Konkoly Observatory, CSFK)

Description

The nucleosynthesis of elements heavier than iron in stars is one of the most relevant topics in nuclear astrophysics. The neutron-capture processes made most of the abundances of heavy elements in the solar system, but they are not able to make a number of rare proton-rich stable isotopes (p-nuclei) lying on the left side of the stability valley. The $\gamma$-process, i.e. a chain of photodisintegrations on heavy nuclei, is the most established process for the synthesis of p-nuclei in core-collapse supernovae. In this talk, I will present the main features of the $\gamma$-process nucleosynthesis in massive stars, considering a range of different progenitor stars and supernova explosions. I will discuss present uncertainties affecting the $\gamma$-process, and the discrepancies between theory and observations affecting the production of the stable p-nuclei and of the radioactive isotopes ${}^{92}\mathrm{N}\mathrm{b}$ and ${}^{146}\mathrm{S}\mathrm{m}$, which signature has been measured in Early Solar System material.

Presentation materials

NPA_X_Poster_Roberti.pdf