Invariant-mass spectroscopy of the neutron-drip line nucleus 14Be

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

Research output: Contribution to journalArticlepeer-review


We performed an experiment of the inelastic scattering of the two neutron halo nucleus 14Be at 68 A MeV on a carbon target. Since 14Be has no bound excited state, 14Be breaks up into 12Be and two neutrons. Using the invariant-mass method, the first excited state of 14Be is clearly observed at Eex 1.56(13) MeV. A distorted-wave Born approximation analysis is performed and the spin-parity corresponding to the peak is assigned to be Jπ 2 +. Deformation length of 14Be is extracted to be C 1.53(10) fm. These experimental results are compared with shell-model calculations.

Original languageEnglish
Article number010
Pages (from-to)43-44
Number of pages2
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2006 Oct 10
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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