Gamma-ray spectroscopy of 12 Λ C via the (π+,K+) reaction

K Hosomi,S Ajimura, Kenji Aoki,Masayuki Dairaku,Y Y Fu, Hisashi Fujioka,Toshio Fukuda,K Futatsukawa,W Imoto, Y Kakiguchi, Motoharu Kawai,Saori Kinoshita,Takao Koike,Yungdae Ma, N Maruyamai, M Mimori,Shohei Minami, Yoshiaki Miura,Koji Miwa,Yohei Miyagi,T Nagae, D Nakajima,H Noumi,K Shirotori,Tsutomu Suzuki, T Takahashi,H Tamura,K Tanida,Nobuo Terada,Atsushi Toyoda,K Tsukada,M Ukai,S H Zhou

Nuclear Physics A（2013）

引用 20|浏览45

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摘要

A γ-ray spectroscopy experiment via the C12(π+,K+) reaction was carried out at KEK-PS in 2005. The K6 beam line and Superconducting Kaon Spectrometer (SKS) were employed to obtain a missing mass spectrum for 12ΛC. An upgraded germanium detector array, Hyperball2, was introduced to detect γ rays emitted from hypernuclei in coincidence with the (π+,K+) reaction. As a result of further analysis, a γ-ray peak at 6048 keV (preliminary) was newly observed and assigned as the M1 transition from the 6-MeV excited state to the ground state.

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关键词

Λ hypernuclei,γ-Ray spectroscopy,ΛN interaction,Hyperball

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