Precise determination of Λ12C level structure by γ-ray spectroscopy
Precise determination of Λ12C level structure by γ-ray spectroscopy
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DOI：
10.1093/ptep/ptv113
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发表时间：
2015-03
影响因子：
3.5
通讯作者：
K. Hosomi;K. Hosomi;Y. Ma;S. Ajimura;K. Aoki;S. Dairaku;Yuanyong Fu;H. Fujioka;K. Futatsukawa;W. Imoto;Y. Kakiguchi;M. Kawai;S. Kinoshita;T. Koike;N. Maruyama;M. Mimori;S. Minami;Y. Miura;K. Miwa;Y. Miyagi;T. Nagae;D. Nakajima;H. Noumi;K. Shirotori;T. Suzuki;Toshiyuki Takahashi;T. Takahashi;H. Tamura;K. Tanida;N. Terada;A. Toyoda;K. Tsukada;M. Ukai;Shuhua Zhou
中科院分区：
文献类型：
--
作者：
K. Hosomi;K. Hosomi;Y. Ma;S. Ajimura;K. Aoki;S. Dairaku;Yuanyong Fu;H. Fujioka;K. Futatsukawa;W. Imoto;Y. Kakiguchi;M. Kawai;S. Kinoshita;T. Koike;N. Maruyama;M. Mimori;S. Minami;Y. Miura;K. Miwa;Y. Miyagi;T. Nagae;D. Nakajima;H. Noumi;K. Shirotori;T. Suzuki;Toshiyuki Takahashi;T. Takahashi;H. Tamura;K. Tanida;N. Terada;A. Toyoda;K. Tsukada;M. Ukai;Shuhua Zhou
Level structure of the $^{12}_{\Lambda}$C hypernucleus was precisely determined by means of $\gamma$-ray spectroscopy. We identified four $\gamma$-ray transitions via the $^{12}$C$(\pi^{+},K^{+}\gamma)$ reaction using a germanium detector array, Hyperball2. The spacing of the ground-state doublet $(2^{-}_{1},1^{-}_{1})$ was measured to be $161.5\pm0.3\text{(stat)}\pm0.3\text{(syst)}$\,keV from the direct $M1$ transition. Excitation energies of the $1^{-}_{2}$ and $1^{-}_{3}$ states were measured to be $2832\pm3\pm4$\,keV and $6050\pm8\pm7$\,keV, respectively. The obtained level energies provide definitive references for the reaction spectroscopy of $\Lambda$ hypernuclei.
Level structure of the $^{12}_{\Lambda}$C hypernucleus was precisely determined by means of $\gamma$-ray spectroscopy. We identified four $\gamma$-ray transitions via the $^{12}$C$(\pi^{+},K^{+}\gamma)$ reaction using a germanium detector array, Hyperball2. The spacing of the ground-state doublet $(2^{-}_{1},1^{-}_{1})$ was measured to be $161.5\pm0.3\text{(stat)}\pm0.3\text{(syst)}$\,keV from the direct $M1$ transition. Excitation energies of the $1^{-}_{2}$ and $1^{-}_{3}$ states were measured to be $2832\pm3\pm4$\,keV and $6050\pm8\pm7$\,keV, respectively. The obtained level energies provide definitive references for the reaction spectroscopy of $\Lambda$ hypernuclei.