alpha-cluster structure in F-19 and Ne-19 in resonant scattering

The nuclear structure of 19F and 19Ne is important for understanding of alpha clustering in the A = 20 mass region and in questions related to astrophysics. However, the only high-resolution broad angular and energy range study of the 19F resonance structure in alpha +15N scattering was published over 60 years ago, and a detailed analysis of complex excitation functions of overlapping resonances with several decay channels was simply impossible at that time. We performed a modern R-matrix analysis of these old data to assign spins and specify resonant parameters of levels up to excitation energy of 8.2 MeV in 19F. We successfully tested our R-matrix parameters in a fit of the recent data on alpha +15N obtained by thick target inverse kinematics (TTIK) method at 180 degrees. We used the new parameters for 19F to fit TTIK data for alpha+15O, the mirror resonant reactions. The comparison of the data for isobaric mirror resonant reactions provides an interesting insight into the nuclear structure.