The second 2+ state in the 10 MeV region of 12C was investigated by measuring decay-α particles in the 12C nucleus excited by inelastic α scattering at 0°. Angular correlation functions were obtained at backward angles from 115° to 255°. Those for 9.64 MeV 3-, 15.4 MeV 2+, and 18.2 MeV 2+ states were good agreement with the PWBA calculation. The third 0+ state was also investigated. The coincidence spectra at 245° of decay-α particles seem to be consisted of two 0+ components.
- Alpha decay
- Cluster model