High-lying excited states in 10 Be from the 9 Be( 9 Be, 10 Be) 8 Be reaction

A transfer-reaction experiment of 9 Be( 9 Be, 10 Be) 8 Be was performed at a beam energy of 45 MeV. Excited states in 10 Be up to 18.80 MeV are produced using missing mass and invariant mass methods. Most of the observed high-lying resonant states, reconstructed from the α + 6 He and t + 7 Li decay channels, agree with the previously reported results. In addition, two new resonances at 15.6 and 18.8 MeV are identified from the present measurement. The 18.55 MeV state is found to decay into both the t + 7 Li g.s . and t + 7 Li* (0.478 MeV) channels, with a relative branching ratio of 0.93 ± 0.33. Further theoretical investigations are encouraged to interpret this new information on cluster structure in neutron-rich light nuclei.