The role of 13C excited states in α+9Be reaction and scattering cross sections

The spectroscopy of 13 C excited states above the alpha emission threshold has been investigated by studying data on 9 Be(α,α )9 Be and 9 Be(α ,n)12 C collisions at bombarding energies in the range Eα ≈2-10 MeV. A multichannel R -matrix fit allowed us to better constrain the spectroscopy of 13 C states above the α threshold (10.65 MeV). Preliminary results on this analysis will be discussed.