Spectroscopy of A=9 hyperlithium with the (e,e′K+) reaction

T. Gogami, C. Chen, D. Kawama, P. Achenbach, A. Ahmidouch, I. Albayrak, D. Androic, A. Asaturyan, R. Asaturyan, O. Ates, P. Baturin, R. Badui, W. Boeglin, J. Bono, E. Brash, P. Carter, A. Chiba, E. Christy, S. Danagoulian, R. De LeoD. Doi, M. Elaasar, R. Ent, Y. Fujii, M. Fujita, M. Furic, M. Gabrielyan, L. Gan, F. Garibaldi, D. Gaskell, A. Gasparian, Y. Han, O. Hashimoto, T. Horn, B. Hu, Ed V. Hungerford, M. Jones, H. Kanda, M. Kaneta, S. Kato, M. Kawai, H. Khanal, M. Kohl, A. Liyanage, W. Luo, K. Maeda, A. Margaryan, P. Markowitz, T. Maruta, A. Matsumura, V. Maxwell, D. Meekins, A. Mkrtchyan, H. Mkrtchyan, S. Nagao, S. N. Nakamura, A. Narayan, C. Neville, G. Niculescu, M. I. Niculescu, A. Nunez, Nuruzzaman, Y. Okayasu, T. Petkovic, J. Pochodzalla, X. Qiu, J. Reinhold, V. M. Rodriguez, C. Samanta, B. Sawatzky, T. Seva, A. Shichijo, V. Tadevosyan, L. Tang, N. Taniya, K. Tsukada, M. Veilleux, W. Vulcan, F. R. Wesselmann, S. A. Wood, T. Yamamoto, L. Ya, Z. Ye, K. Yokota, L. Yuan, S. Zhamkochyan, L. Zhu

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3 Citations (Scopus)


Missing mass spectroscopy with the (e,e′K+) reaction was performed at Jefferson Laboratory's Hall C for the neutron-rich Λ hypernucleus LiΛ9. The ground-state (g.s.) energy was obtained to be BΛg.s.=8.84±0.17stat.±0.15sys.MeV by using shell-model calculations of a cross-section ratio and an energy separation of the spin doublet states (3/21+ and 5/21+). In addition, peaks that are considered to be states of [Li8(3+) - sΛ=3/22+,1/2+] and [Li8(1+) - sΛ=5/22+,7/2+] were observed at EΛ(no.2)=1.74±0.27stat.±0.11sys. and EΛ(no.3)=3.30±0.24stat.±0.11sys.MeV, respectively. The EΛ(no.3) is larger than shell-model predictions by a few hundred keV, and the difference would indicate that a He5+t structure is more developed for the 3+ state than those for the 2+ and 1+ states in a core nucleus Li8 as a cluster model calculation suggests.

Original languageEnglish
Article numberL041301
JournalPhysical Review C
Issue number4
Publication statusPublished - 2021 Apr


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