Search for ²⁸Si cluster states through the ¹²C+¹⁶O radiative capture

The ¹²C+¹⁶O resonant radiative capture reaction has been studied at 5 bombarding energies around the Coulomb barrier, between E_lab = 15.4 and 21.4 MeV. These experiments have been performed at the TRIUMF laboratory (Vancouver, Canada) using the Dragon 0° spectrometer and the associated BGO array. The most remarkable result is the previously unobserved decay path through ²⁸Si doorway states of energies around 12 MeV leading to the measurement of new capture cross-sections. The feeding of specific, deformed states in ²⁸Si from the resonances is discussed, as well as the selective feeding of 1+ T=1 states around 11 MeV.