Alpha Chain Structures of 12C
Abstract
N-α structures of light nuclei with axial symmetry are studied using relativistic Hartree approximation. Metastable excited states are searched in a configuration space which allows linear alpha chain structures. As a result, it is shown that 12C has 8Be + α resonance state at about 1 MeV above 8Be-α threshold as an asymmetric 3-α linear-chain structure, which plays an important role in stellar nucleosynthesis.
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