First Exploration of Neutron Shell Structure below Lead and beyond N=126.
First Exploration of Neutron Shell Structure below Lead and beyond N=126.
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DOI：
10.1103/physrevlett.124.062502
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发表时间：
2020-01
影响因子：
8.6
通讯作者：
T. L. Tang;B. Kay;C. Hoffman;J. Schiffer;D. Sharp;L. Gaffney;S. Freeman;M. Mumpower;A. Arokiaraj;E. Baader;P. Butler;W. Catford;G. de Angelis;F. Flavigny;M. Gott;E. Gregor;J. Konki;M. Labiche;I. Lazarus;P. MacGregor;I. Martel;R. Page;Z. Podolyák;O. Poleshchuk;R. Raabe;F. Recchia;J. F. Smith-J. F.-Smith-2127105908;S. Szwec;J. Yang
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文献类型：
--
作者：
T. L. Tang;B. Kay;C. Hoffman;J. Schiffer;D. Sharp;L. Gaffney;S. Freeman;M. Mumpower;A. Arokiaraj;E. Baader;P. Butler;W. Catford;G. de Angelis;F. Flavigny;M. Gott;E. Gregor;J. Konki;M. Labiche;I. Lazarus;P. MacGregor;I. Martel;R. Page;Z. Podolyák;O. Poleshchuk;R. Raabe;F. Recchia;J. F. Smith-J. F.-Smith-2127105908;S. Szwec;J. Yang
低于铅但超过126个中子的原子核对于理解产生比A190重的原子核的天体物理过程至关重要。尽管它们的重要性，这些原子核的结构和性质仍然未经实验测试，因为它们很难在具有稳定束的核反应中产生。在对该区域壳层结构的首次探索中，利用逆运动学中的中子加成（d，p）反应探测了^{207}Hg中的中子激发。将^{206}Hg的放射性束以高于库仑势垒的能量输送到新的ISOLDE螺线管光谱仪。^{207}Hg的光谱学标志着我们在提高对r过程路径的关键部分所涉及的核的相关结构性质的理解方面迈出了第一步。
The nuclei below lead but with more than 126 neutrons are crucial to an understanding of the astrophysical r process in producing nuclei heavier than A∼190. Despite their importance, the structure and properties of these nuclei remain experimentally untested as they are difficult to produce in nuclear reactions with stable beams. In a first exploration of the shell structure of this region, neutron excitations in ^{207}Hg have been probed using the neutron-adding (d,p) reaction in inverse kinematics. The radioactive beam of ^{206}Hg was delivered to the new ISOLDE Solenoidal Spectrometer at an energy above the Coulomb barrier. The spectroscopy of ^{207}Hg marks a first step in improving our understanding of the relevant structural properties of nuclei involved in a key part of the path of the r process.