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.
|ジャーナル||Physical Review C - Nuclear Physics|
|出版ステータス||Published - 2001 10|
ASJC Scopus subject areas
- Nuclear and High Energy Physics