Narrow Results

The 3α resonant states of ¹²C are investigated by taking into account the correct boundary condition for three-body resonant states. In order to show how the 3α resonant states having complex eigenvalues contribute to the real energy, we calculated the Continuum Level Density in the Complex Scaling Method.

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.