The Ground State Structure of 8 He Probed by the Knockout Reaction
The Ground State Structure of 8 He Probed by the Knockout Reaction
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DOI：
10.7566/jpscp.1.013024
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Z. Tian;Y. Ye;Z. Yang;Z. Cao;J. Xiao;L. Lv
中科院分区：
文献类型：
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作者：
Z. Tian;Y. Ye;Z. Yang;Z. Cao;J. Xiao;L. Lv
用质子靶在82mev /核子下的逆运动学敲除反应研究了he核。在本实验中，反冲质子与堆芯碎片和正向发射的中子是一致的。确定了6氦核团的准自由敲除机制，提取的光谱因子接近统一。利用质子标记技术获得了较窄的7氦基态共振谱。推导出与6氦核片段重合的两个价中子的相对动量相关函数，表明8氦基态可能存在较强的两个中子相关。
8He nucleus has been studied by the knockout reaction in inverse kinematics with the proton target at 82 MeV/nucleon. In this experiment, the recoil protons were detected in coincidence with the core fragments and the neutrons emitted in the forward direction. The quasi-free knockout mechanism is identified and the extracted spectroscopic factor for 6 He core cluster is close to unity. A narrower resonant spectrum of 7 He ground state was obtained by applying the proton tagging technique. Relative momentum correlation function for the two valence neutrons in coincidence with the 6 He core fragment was also deduced, indicating a possible strong two neutron correlation in 8 He ground state.