The first 2+ state of 14Be

T. Sugimoto, T. Nakamura, Y. Kondo, N. Aoi, H. Baba, D. Bazin, N. Fukuda, T. Gomi, H. Hasegawa, N. Imai, M. Ishihara, T. Kobayashi, T. Kubo, M. Miura, T. Motobayashi, H. Otsu, A. Saito, H. Sakurai, S. Shimoura, A. M. VinodkumarK. Watanabe, Y. X. Watanabe, T. Yakushiji, Y. Yanagisawa, K. Yoneda

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


The first excited state of the most neutron-rich beryllium isotope, 14Be, has been studied by inelastic scattering with a 12C target at 68   MeV / nucleon. The state has been observed at Ex = 1.54 (13)   MeV, and its spin-parity has been determined as Jπ = 2+ from the measurement of the angular distribution. This provides a complete set of energies of the first 2+ states in the beryllium isotopic chain. The extracted deformation length of 14Be has been found to be substantially smaller than that of the neighboring nucleus 12Be, in which the N = 8 shell closure is quenched, indicating hindered collectivity in the 14Be nucleus.

Original languageEnglish
Pages (from-to)160-164
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number5-6
Publication statusPublished - 2007 Oct 18
Externally publishedYes


  • Collectivity
  • Drip-line nucleus
  • Shell evolution

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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