Measuring ${}^{19,20}$O(p,n)${}^{19,20}$F reactions using an active target detector

Proton capture on ${}^{19,20}$O nuclei is measured in inverse kinematics with the active target detector MuSIC@Indiana using CH${}_4$ as the target gas. Rejection of unreacted and inelastically scattered beam, along with transfer and fusion on the ${}^{12}$C allows extraction of the (p,n) cross section. As the cross-section for direct (p,n) processes at these energies is small, the measurement provides access to the proton fusion cross-section. An analysis approach that allows extraction of the proton fusion cross-section is detailed.