Austin Nelson

Re-measurement of the S33(α,p)Cl36 cross section for early solar system nuclide enrichment

Short-lived radionuclides (SLRs) with half-lives less than 100 Myr are known to have existed around the time of the formation of the solar system around 4.5 billion years ago. Understanding the production sources for SLRs is important for improving our understanding of processes taking place just after solar system formation as well as their timescales. Early solar system models rely heavily on calculations from nuclear theory due to a lack of experimental data for the nuclear reactions taking place. In 2013, Bowers et al. measured

Activity measurement of Fe60 through the decay of Co60m and confirmation of its half-life

{}^{36}

Precision half-life measurement of

Cl production cross sections via the

^{11}\mathrm{C}

{}^{33}

: The most precise mirror transition

S(

\mathcal{F}t

\alpha

value

,p) reaction and reported cross sections that were systematically higher than predicted by Hauser-Feshbach codes. Soon after, a paper by Peter Mohr highlighted the challenges the new data would pose to current nuclear theory if verified. The

Precision half-life measurement of C11: The most precise mirror transition Ft value

{}^{33}

Re-measurement of the

S(

{}^{33}

\alpha