Alpha cluster states and molecular orbitals in sd-shell nuclei Original Research Article

The α-clustering and molecular-orbitals of 22Ne and F isotopes are investigated based on antisymmetrized molecular dynamics (AMD). The observed candidates for the α cluster state of 22Ne are understood as the molecular-orbital states and α+18O di-nuclei states. The presence of the molecular-orbital states in the O and F isotopes and the drastic reduction of their excitation energy near the neutron-drip line are predicted.