The first excited state of 30Ne studied by proton inelastic scattering in reversed kinematics

• Published in: Physics letters. B 2003-07, Vol.566 (1-2), p.84-89
• Main Authors: Yanagisawa, Y, Notani, M, Sakurai, H, Kunibu, M, Akiyoshi, H, Aoi, N, Baba, H, Demichi, K, Fukuda, N, Hasegawa, H, Higurashi, Y, Ishihara, M, Iwasa, N, Iwasaki, H, Gomi, T, Kanno, S, Kurokawa, M, Matsuyama, Y.U, Michimasa, S, Minemura, T, Mizoi, T, Nakamura, T, Saito, A, Serata, M, Shimoura, S, Sugimoto, T, Takeshita, E, Takeuchi, S, Ue, K, Yamada, K, Yoneda, K, Motobayashi, T
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(03)00802-5

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’.