Role of the ? Resonance in the Population of a Four-Nucleon State in the ^{56}Fe?^{54}Fe Reaction at Relativistic Energies.
Role of the ? Resonance in the Population of a Four-Nucleon State in the ^{56}Fe?^{54}Fe Reaction at Relativistic Energies.
复制标题
的作用？
DOI：
10.1103/physrevlett.117.222302
复制
发表时间：
2016
影响因子：
8.6
通讯作者：
Podolyák Z
中科院分区：
文献类型：
--
作者：
Podolyák Z
核是由能量为 的光束撞击 Be 目标而形成的。通过亚稳态的射线发射观察到内部衰变。由于这种异构态的结构必须涉及至少四个不成对的核子，因此它不能通过简单的从基态去除两个中子的反应来填充。异构态是在平行动量（能量）分布的低动量（能量）尾部产生的，表明它是通过共振衰变成质子而填充的。这个过程允许四核子状态的聚集，例如观察到的异构体。因此，得出的结论是，观察到的这种亚稳态是核子夸克结构的结果。
Thenucleus was populated from abeam impinging on a Be target with an energy of. The internal decay via-ray emission of themetastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from theground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of, suggesting that it was populated via the decay of theresonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of thismetastable state inis a consequence of the quark structure of the nucleons.