11Li双中子晕的新结合能。
New binding energy for the two-neutron halo of 11Li.
作者信息
Bachelet C, Audi G, Gaulard C, Guénaut C, Herfurth F, Lunney D, de Saint Simon M, Thibault C
机构信息
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), IN2P3-CNRS-Université Paris-Sud 11, 91405 Orsay, France.
出版信息
Phys Rev Lett. 2008 May 9;100(18):182501. doi: 10.1103/PhysRevLett.100.182501. Epub 2008 May 6.
The extended radius of a halo nuclide is very sensitive to the minute binding energy of its valence nucleons. The binding energy of 11Li has been measured with high precision by using the radio-frequency spectrometer MISTRAL at CERN's ISOLDE facility. The new two-neutron separation energy of 378+/-5 keV is 25% higher than the previously accepted value with an uncertainty 5 times smaller.
晕核素的扩展半径对其价核子的微小结合能非常敏感。通过使用欧洲核子研究中心（CERN）的ISOLDE设施中的射频光谱仪MISTRAL，已高精度测量了¹¹Li的结合能。新的两中子分离能为378±5 keV，比先前公认的值高25%，且不确定性小5倍。
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