Core-collapse SN models predict enhanced heavy element abundances in the r-process by extending the reaction network to include light, neutron-rich nuclei (Z<10). Based on the sensitivity study, ^11,12B(n,γ)^12,13B are found to be important for the production of the carbon isotopes, which can immediately convert to heavier seed nuclei in the neutrino-driven wind model. We have measured the (d,p) reaction with a radioactive ¹²B beam and stable ¹¹B beam using the ATLAS in-flight facility at ANL. The spectroscopic factors and the branching ratio from these measurements are used in determining the reaction rates that are compared with theoretical calculations. The astrophysical implications using the present reaction rates of ¹¹B(n,γ) and ^12BB(n,γ) will be discussed.

ANL Physics Division Seminar Schedule