Proton inelastic scattering to the dilute α-cluster condensed 02+ state at Ex=7.654 MeV in 12C

Differential cross sections for the 02+ state at Ex=7.654 MeV in 12C were measured with the (p,p') reaction at an incident energy of Ep=300 MeV, and in an angular range from θLab=2.7 deg. to 40 deg. The cross-section data were compared with the distorted-wave Born-approximation calculations employing three types of transition densities obtained in a macroscopic collective model, a microscopic α-cluster model, and a microscopic α-cluster condensation model. It is concluded that the measured angular distribution of the differential cross sections for the 12C(p,p') reaction at 300 MeV is consistently described with the assumption that the 02+ state at Ex=7.654 MeV is the dilute α-cluster condensed state.