Li9中He6+t簇态的观察

IF 3.2 2区物理与天体物理 Q2 PHYSICS, NUCLEAR

Physical Review C Pub Date : 2017-09-08 DOI:10.1103/PhysRevC.103.L061302

W. Ma, D. Patel, Y. Yang, J. Wang, Y. Kanada-En’yo, R. F. Chen, J. Lubian, Y. Ye, Z. Yang, Z. Ren, S. Mukherjee, J. Ma, S. Jin, P. Ma, J. Li, Y. Song, Q. Hu, Z. Bai, M. Huang, X. Liu, Y. Zhou, J. Chen, Z. Gao, F. Duan, S. Jin, S. W. Xu, G. Yu, G. Shi, Q. Wang, T. Wang, X. Ju, Z. Hu, Y. Zhang, X. Zhou, H. Xu, G. Xiao, W. Zhan

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引用次数: 0

摘要

用32.7 MeV/核子的$^{9}$Li束轰击$^{208}$Pb靶，测量了$^{6}$He+$t$ Li的簇态。在激发能为9.8 MeV和12.6 MeV，自旋宇称分别为3/2$^{-}$和7/2$^{-}$的情况下，可以清楚地观察到两个共振态。这两种状态被认为是K$^{\pi}$=1/2$^{-}$带的成员。用角相关分析方法确定了它们的自旋宇称，并用连续离散耦合通道(CDCC)计算验证了它们的自旋宇称，与发电机坐标法(GCM)的预测一致。从畸变波玻恩近似(DWBA)计算中提取了3/2$^{-}$状态约为4 fm$^{2}$的单极矩阵元。这些结果首次有力地支持了富中子核$^{9}$Li中两个富中子团簇结构的特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Observation of He6+t cluster states in Li9

$^{6}$He+$t$ cluster states of exited $^{9}$Li have been measured by 32.7 MeV/nucleon $^{9}$Li beams bombarding on $^{208}$Pb target. Two resonant states are clearly observed with the excitation energies at 9.8 MeV and 12.6 MeV and spin-parity of 3/2$^{-}$ and 7/2$^{-}$ respectively. These two states are considered to be members of K$^{\pi}$=1/2$^{-}$ band. The spin-parity of them are identified by the method of angular correlation analysis and verified by the continuum discretized coupled channels (CDCC) calculation, which agrees with the prediction of the generator coordinate method (GCM). A monopole matrix element about 4 fm$^{2}$ for the 3/2$^{-}$ state is extracted from the distorted wave Born approximation (DWBA) calculation. These results strongly support the feature of clustering structure of two neutron-rich clusters in the neutron-rich nucleus $^{9}$Li for the first time.

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来源期刊

Physical Review C PHYSICS, NUCLEAR-

CiteScore

5.80

自引率

35.50%

发文量

863

期刊介绍： Physical Review C (PRC) is a leading journal in theoretical and experimental nuclear physics, publishing more than two-thirds of the research literature in the field. PRC covers experimental and theoretical results in all aspects of nuclear physics, including: Nucleon-nucleon interaction, few-body systems Nuclear structure Nuclear reactions Relativistic nuclear collisions Hadronic physics and QCD Electroweak interaction, symmetries Nuclear astrophysics