Shell-model description of 16 C with the Idaho N 3 LO NN potential

The structure of the neutron-rich carbon nucleus 16 C is described within a new microscopic shell-model framework. The model space is composed of the 0s ,0 p ,1 s0d and 1p0f shells, and thus a sort of no-core type. The effective interaction is microscopically derived from the Idaho N 3 LO NN potential and the Coulomb force through a unitary transformation theory. Calculated low-lying energy levels of 16 C agree well with the experimental values. Furthermore, the anomalously hindered B(E2; 2 + → 0 + ) value for 16 C, measured recently, is well described by the calculation with the bare charges.