Author/Authors :
Y Yanagisawa، نويسنده , , M Notani، نويسنده , , H Sakurai، نويسنده , , M. Kunibu، نويسنده , , H Akiyoshi، نويسنده , , N Aoi، نويسنده , , H Baba، نويسنده , , K. Demichi، نويسنده , , N Fukuda، نويسنده , , H Hasegawa، نويسنده , , Y Higurashi، نويسنده , , M Ishihara، نويسنده , , N Iwasa، نويسنده , , H Iwasaki، نويسنده , , T Gomi، نويسنده , , S Kanno، نويسنده , , M Kurokawa، نويسنده , , Y.U Matsuyama، نويسنده , , S Michimasa، نويسنده , , T Minemura، نويسنده , , et al.، نويسنده ,
Abstract :
The energy of the first excited state of the very neutron-rich nucleus 30Ne was determined by proton inelastic scattering. A liquid hydrogen target was bombarded by a beam of radioactive 30Ne at 48 MeV/nucleon, and energies of the de-excitation γ rays emitted from the excited 30Ne 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 enhancement of deformation as the neutron excess increases in the N=20 isotones. The results indicate that 30Ne belongs to the ‘island of inversion’.
