论文标题
首次探索铅和超越$ \ boldsymbol {n = 126} $以上的中子壳结构
First Exploration of Neutron Shell Structure Below Lead and Beyond $\boldsymbol{N=126}$
论文作者
论文摘要
下面的细胞核铅，但有超过126个中子对于了解天体物理$ r $ $ $ $ $ $ r $ process的原子核的重量至关重要。尽管它们的重要性，但这些核的结构和特性仍然在实验中未经测试，因为它们在具有稳定梁的核反应中很难产生。在对该区域的外壳结构的首次探索中，使用中子添加（$ d $，$ p $）反应中的$^{207} $ hg中的中子激发。 $^{206} $ Hg的放射性光束以库仑屏障上方的能量传递到新的Isolde螺线管光谱仪。 $^{207} $ hg的光谱标志着我们对我们对$ r $ process涉及的核的相关结构特性的理解的第一步。
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 $A\sim190$. 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.
