Evidence for α‐cluster condensation in the 0 2 + state at E x = 7.654 MeV in 12 C via the ( p , p′ ) reaction at 300 MeV

We measured the differential cross sections for the 0(2)(+) state at E-x=7.654 MeV in C-12 via the (p,p') reaction at an incident energy of 300 MeV, and in an angular range from 2.7 degrees to 40 degrees. We analyzed the data with the distorted-wave Born-approximation (DWBA) employing transition densities obtained in a macroscopic collective model, a microscopic alpha-cluster model, and a microscopic alpha-cluster condensation model. It is concluded that the present results for the C-12(p,p') reaction at 300 MeV is quite consistent with the assumption that the 0(2)(+) state at E-x=7.654 MeV has the wave function with the alpha-cluster condensation.