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, Hiroki Kanda, M. Kaneta, S. Kato, M. Kawai, H. Khanal, M. Kohl, A. Liyanage, W. Luo, Kazushige 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, Kyo 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

研究成果: Article査読

抄録

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.

本文言語English
論文番号L041301
ジャーナルPhysical Review C
103
4
DOI
出版ステータスPublished - 2021 4

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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