Neutron-capture reactions on $^{ 18}$F in the helium-burning shell play an important role in the production of $^{ 15}$N during core-collapse supernovae. The competition between the $^{ 18}$F($n,p/\alpha$)$^{ 18}$O/$^{ 15}$N reactions controls the amount of $^{ 15}$N produced. The strengths of these reactions depend on the decay branching ratios of states in $^{ 19}$F above the neutron threshold. We report on an experiment investigating the decay branching ratios of these states in order to better constrain the strengths of the reactions.
Categories: nucl-ex
