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Given the established 2 alpha structure of 8Be, a realistic model of 4interacting alpha clusters must be used to obtain a 8Be+8Be interactionpotential. Such a four-body problem poses a challenge for the determination ofthe 8Be+8Be optical potential (OP) that is still unknown due to the lack of theelastic 8Be+8Be scattering data. The main goal of the present study is to probethe complex 8Be+8Be optical potential in the coupled reaction channel (CRC)study of the alpha transfer 12C(alpha,8Be) reaction measured at 65 MeV, and toobtain the spectroscopic information on the alpha+8Be cluster configuration of12C. The 3- and 4-body Continuum-Discretized Coupled Channel (CDCC) methods areused to calculate the elastic alpha+8Be and 8Be+8Be scattering at the energyaround 16 MeV/nucleon, with the breakup effect taken into account explicitly.Using the CDCC-based OP and alpha spectroscopic factors given by the clustermodel calculation, a good CRC description of the alpha transfer data withoutany adjustment of the (complex) potential strength.

Coupled reaction channel study of the 12C(alpha,8Be) reaction, and the 8Be+8Be optical potential