ALPHA-CHAIN STATES IN C-12

Alpha-chain states in C12 are studied by employing the isomorphic shell model. Where possible α particles and their spatial distribution are derived, instead of being assumed as usual in α-cluster models. It has been found that the average forms of both the ground state and the first 0+ excited state can be associated with an α chain composed of three α particles in a row. The ground state and the first 0+ excited state energies and their rotational bands, together with their charge radii and intrinsic quadrupole moments, have been computed and compared with the predictions of α-particle models. With reference to experimental data, all quantities examined lend support to the present approach. © 1995 The American Physical Society.