Hypernuclear fine structure in Λ9Be

H. Akikawa, S. Ajimura, R. E. Chrien, P. M. Eugenio, G. B. Franklin, J. Franz, L. Gang, K. Imai, P. Khaustov, M. May, P. H. Pile, B. Quinn, A. Rusek, J. Sasao, R. I. Sawafta, H. Schmitt, H. Tamura, L. Tang, K. Tanida, L. YuanS. H. Zhou, L. H. Zhu, X. F. Zhu

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138 Citations (Scopus)


γ rays from 9∧Be produced by the 9Be(K--) reaction were measured. Two γ ray peaks corresponding to the 5/2+ → 1/2+ and 3/2+ → 1/2+ transitions were observed. The energies of the γ rays are 3029 ± 2 ± 1 keV and 3060 ± 2 ± 1 keV, and their energy spacing is 31.4-3.6+0.28 keV. The lifetime of the γ-decaying states is 0.51-0.14+0.28 ps which converts to a reduced transition probability of B(E2) = 5.7-2.0+2.1 e2 fm4. The result of a small spacing gives a very small ∧-spin-dependent ∧N spin-orbit force.

Original languageEnglish
Pages (from-to)082501/1-082501/4
JournalPhysical review letters
Issue number8
Publication statusPublished - 2002 Feb 25
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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