论文标题
2n转移反应的实验研究$^{138} $ ba（$^{18} $ o，$^{16} $ o）$^{140} $ ba在弹丸能量范围内61-67 MEV
Experimental study of the 2n-transfer reaction $^{138}$Ba($^{18}$O,$^{16}$O)$^{140}$Ba in the projectile energy range 61-67 MeV
论文作者
论文摘要
在核图表的中子富部分中，两种中子转移反应是核结构研究的重要工具。在本文中，我们报告了第一次实验尝试，该尝试填充了$^{140} $ ba的激发状态，该态度采用了2n-Neutron转移反应$^{138} $ ba（$^{18} $ o，$ o，$^{16} $^{16} $ o）$^{140} $ ba。 $^{140} $ ba非常重要，因为它放置在八杆相关性的开始，其激发态的寿命是完全未知的，除了第一个2 $^+$状态外，唯一的除外。该实验是在罗马尼亚玛格勒市的Horia Hulubei国家物理与核工程研究所（Ifin-HH）进行的。据报道，据报道，地面状态频段的寿命下限至8 $^+$状态。此外，已经推导了有关融合和总非弹性反应通道的2N转移反应的相对横截面。还讨论了$^{140} $ ba的核结构的进一步调查指示。
Two-neutron transfer reactions serve as an important tool for nuclear structure studies in the neutron rich part of the nuclear chart. In this article, we report on the first experimental attempt to populate the excited states of $^{140}$Ba employing the 2n-neutron transfer reaction $^{138}$Ba($^{18}$O,$^{16}$O)$^{140}$Ba. $^{140}$Ba is highly important, as it is placed on the onset of octupole correlations and the lifetimes of its excited states are completely unknown, with the sole exception of the first 2$^+$ state. The experiment was carried out at the Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH) in Magurele, Romania. Lower limits on the lifetimes of ground state band up to the 8$^+$ state are reported. Furthermore, relative cross sections regarding the 2n-transfer reaction with respect to the fusion and the total inelastic reaction channels have been deduced. Further investigation directions of the nuclear structure of $^{140}$Ba are also discussed.
