论文标题
利用耗散反应，以执行中子缺陷同位素的光束$γ$ -Ray光谱\ nuc {38,39} {ca}
Exploiting dissipative reactions to perform in-beam $γ$-ray spectroscopy of the neutron-deficient isotopes \nuc{38,39}{Ca}
论文作者
论文摘要
由于中子缺陷的Ca同位素对测试同胞对称性的重要性以及它们在捕获Nova核合成感兴趣的反应中的相关性以及I型X型X射线突发中光曲线的形状而继续引起人们的注意。迄今为止，有关38,39 CA的光谱信息在很大程度上仅限于下旋转激发态的数据。在这里，我们报告了39个CA的互补高旋转，复杂结构状态的束内γ射线光谱，这些态在39个CA中，在快速光束诱导的，动量散引血的过程中，导致中子拾取到弹丸的激发构型，9 BE（38 Ca，39 Ca +γ）x。最近对这种耗散反应的表征是针对38 Ca Off 9 Be，9 Be（38 Ca，38 Ca +γ）X的无弹性散射的情况的表征。还提供了有关38 CA的核结构的其他数据和讨论。还提供了对更复杂的结构状态的解释，该状态在一个核子敲除反应中有小的横截面，并在其纵向动量分布的尾部观察到。
The neutron-deficient Ca isotopes continue to attract attention due to their importance for testing isospin symmetry and their relevance in capture reactions of interest for nova nucleosynthesis and the shape of light curves in Type I X-ray bursts. To date, spectroscopic information on 38,39 Ca is largely limited to data on lower-spin excited states. Here, we report in-beam γ-ray spectroscopy of complementary higher-spin, complex-structure states in 39 Ca populated in fast-beam-induced, momentum-dissipative processes leading to neutron pickup onto excited configurations of the projectile, 9 Be(38 Ca , 39 Ca + γ)X. Such a dissipative reaction was recently characterized for the case of inelastic scattering of 38 Ca off 9 Be, 9 Be(38 Ca, 38 Ca + γ)X. Additional data and discussion on the nuclear structure of 38 Ca is also presented. An explanation for the more-complex-structure states, populated with small cross sections in one-nucleon knockout reactions, and observed in the tails of their longitudinal momentum distributions, is also offered.
