8th p-process workshop 2024

Impact of temperature- and density-dependent decay rates on the production of p-nuclei in low-mass AGB stars

16 Oct 2024, 15:50

10m

Oral presentation Afternoon session

Speaker

Balázs Szányi (Konkoly Observatory, University of Szeged)

Description

By definition, the proton-rich isotopes that cannot be reached by neutron-capture processes are the p-only isotopes or the p-nuclei. However, several p-nuclei can produced by the s process in low-mass AGB stars, e.g. (1) ${}^{94}\mathrm{Mo}$ by two consecutive neutron captures of ${}^{92}\mathrm{Mo}$ and following the decay of ${}^{93}\mathrm{Zr}$ and ${}^{94}\mathrm{Nb}$, (2) ${}^{108}\mathrm{Cd}$ depending on the $\beta$-decay rate of ${}^{107}\mathrm{Pd}$ and ${}^{108}\mathrm{Ag}$, and (3) ${}^{152}\mathrm{Gd}$ due to the operation of ${}^{151}\mathrm{Sm}$ and ${}^{152}\mathrm{Eu}$ branching points. We present how the use of temperature- and density-dependent $\beta$-decay and electron-capture rates instead of terrestrial/constant values affects the production of ${}^{94}\mathrm{Mo}$, ${}^{108}\mathrm{Cd}$ and ${}^{152}\mathrm{Gd}$ in Monash s-process nucleosynthesis models.

Presentation materials

presentation_Balazs_Szanyi.pdf