High-temperature ²⁰⁵Tl decay clarifies ²⁰⁵Pb dating in early Solar System.

ABSTRACT: Radioactive nuclei with lifetimes on the order of millions of years can reveal the formation history of the Sun and active nucleosynthesis occurring at the time and place of its birth^1,2. Among such nuclei whose decay signatures are found in the oldest meteorites, ²⁰⁵Pb is a powerful example, as it is produced exclusively by slow neutron captures (the s process), with most being synthesized in asymptotic giant branch (AGB) stars^3-5. However, making accurate abundance predictions for ²⁰⁵Pb has so far been impossible because the weak decay rates of ²⁰⁵Pb and ²⁰⁵Tl are very uncertain at stellar temperatures^6,7. To constrain these decay rates, we measured for the first time the bound-state β^- decay of fully

SUBMITTER: Leckenby G 

PROVIDER: S-EPMC11560843 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature