Spectroscopy of medium-heavy Λ hypernuclei via the (π+,K+) reaction

H. Hotchi, T. Nagae, H. Outa, H. Noumi, M. Sekimoto, T. Fukuda, H. Bhang, Y. D. Kim, J. H. Kim, H. Park, K. Tanida, O. Hashimoto, H. Tamura, T. Takahashi, Y. Sato, T. Endo, S. Satoh, J. Nishida, T. Miyoshi, T. SaitohT. Kishimoto, A. Sakaguchi, S. Ajimura, Y. Shimizu, T. Mori, S. Minami, M. Sumihama, R. Sawafta, L. Tang

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162 Citations (Scopus)


Excitation energy spectra of 89ΛY, 51ΛV, and 12ΛC have been measured via the (π+, K+) reaction by using the SKS spectrometer at the K6 beam line in the KEK 12-GeV Proton Synchrotron. In the 89ΛY spectrum, obtained with an energy resolution of 1.65 MeV (FWHM) and in the highest statistics so far, we have succeeded in clearly observing a characteristic fine structure in heavy Λ hypernuclear systems and precisely obtaining a series of Λ single-particle energies in the very wide excitation energy range of more than 20 MeV, for the first time. Also in the 51ΛV spectrum, a similar structure to that of 89ΛY was observed. In the 12ΛC spectrum, new core-excited states were clearly resolved thanks to the best energy resolution of 1.45 MeV so far achieved by using the SKS spectrometer.

Original languageEnglish
Article number044302
Pages (from-to)443021-4430215
Number of pages3987195
JournalPhysical Review C - Nuclear Physics
Issue number4
Publication statusPublished - 2001 Oct

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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