Corrigendum to “Single-neutron knockout from 20 C and the structure of 19 C” [Phys. Lett. B 769 (2017) 503–508]
Corrigendum to “Single-neutron knockout from 20 C and the structure of 19 C” [Phys. Lett. B 769 (2017) 503–508]
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“20 C 的单中子敲除和 19 C 的结构”的勘误表 [Phys. Lett. (2017) 503–508]
DOI：
10.1016/j.physletb.2017.08.072
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
K. Yoneda
中科院分区：
文献类型：
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作者：
J. Hwang;S. Kim;Y. Satou;N. Orr;Y. Kondo;Takashi Nakamura;J. Gibelin;N. Achouri;T. Aumann;H. Baba;F. Delaunay;P. Doornenbal;N. Fukuda;N. Inabe;T. Isobe;D. Kameda;D. Kanno;N. Kobayashi;Toshio Kobayashi;T. Kubo;S. Leblond;Jenny Lee;F. M. Marqués;R. Minakata;T. Motobayashi;D. Murai;T. Murakami;K. Muto;T. Nakashima;N. Nakatsuka;A. Navin;S. Nishi;S. Ogoshi;H. Otsu;H. Sato;Y. Shimizu;Hiroshi Suzuki;K. Takahashi;H. Takeda;S. Takeuchi;R. Tanaka;Y. Togano;A. Tuff;M. Vandebrouck;K. Yoneda
用280 MeV/核子的20 C单中子轰击碳靶，研究了晕核19 C的低位未束缚能级结构.研究发现，由向前行进的束流速度18 C碎片和中子的动量导出的不变质谱由一个非常窄的近阈值（E rel= 0.036（1）MeV）峰主导。在Erel = 0.84（4）和2.31（3）MeV处也观察到两个不太强烈的类共振特征，这两个特征都表现出与中子p壳层空穴态一致的特征。将能量、测量截面和平行动量分布与壳模型和程函反应计算结果进行比较，得出在E x= 0.62（9）和2.89（10）MeV，Sn = 0.58（9）MeV时，自旋宇称分别为5/2 1+和1/2 1−。光谱因子也被推导出来，并发现在合理的雅阁壳模型计算。价中子配置的20 C基态，因此被认为包括，除了已知的1 s 1/2 2组件，一个显着的0 d 5/2 2的贡献。19 C的能级方案，包括1/2 1−交叉壳层态，可以很好地用从基于夸克的普适相互作用发展而来的YSOX壳层模型相互作用来解释。
The low-lying unbound level structure of the halo nucleus 19 C has been investigated using single-neutron knockout from 20 C on a carbon target at 280 MeV/nucleon. The invariant mass spectrum, derived from the momenta of the forward going beam velocity 18 C fragment and neutrons, was found to be dominated by a very narrow near threshold (E rel= 0.036 (1) MeV) peak. Two less strongly populated resonance-like features were also observed at E rel= 0.84 (4) and 2.31 (3) MeV, both of which exhibit characteristics consistent with neutron p-shell hole states. Comparisons of the energies, measured cross sections and parallel momentum distributions to the results of shell-model and eikonal reaction calculations lead to spin-parity assignments of 5/2 1+ and 1/2 1− for the levels at E x= 0.62 (9) and 2.89 (10) MeV with S n= 0.58 (9) MeV. Spectroscopic factors were also deduced and found to be in reasonable accord with shell-model calculations. The valence neutron configuration of the 20 C ground state is thus seen to include, in addition to the known 1 s 1/2 2 component, a significant 0 d 5/2 2 contribution. The level scheme of 19 C, including significantly the 1/2 1− cross-shell state, is well accounted for by the YSOX shell-model interaction developed from the monopole-based universal interaction.