Abstract
The energy of the first excited state in the very neutron-rich nucleus 30Ne was determined via proton inelastic scattering. A liquid hydrogen target was bombarded by a radioactive 30Ne beam, and energies of the de-excitation γ rays emitted from excited 30Ne nuclei were measured. The observed transition is likely to be the one from the first 2 + state to the ground state of 30Ne. The excitation energy, 791 (26) keV, is lower than that of 32Mg, indicating an enhancement of deformation as the neutron excess increases in the N = 20 isotones.
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