The alpha particle in nuclear matter
The alpha particle in nuclear matter
复制标题
核物质中的α粒子
DOI：
10.1016/s0370-2693(00)00908-4
复制
发表时间：
2000
影响因子：
4.4
通讯作者：
P. Schuck
中科院分区：
文献类型：
--
作者：
M. Beyer;S. Sofianos;C. Kuhrts;G. Röpke;P. Schuck
在轻核团簇中，α粒子是迄今为止最强的束缚系统，因此预计将在原子核动力学和核物质相中发挥重要作用。为了系统地研究 α 粒子的性质，我们推导了 Alt-Grassberger-Sandhas (AGS) 类型的有效四体方程，其中包括主要的介质效应，即以一致的方式进行自能校正和泡利阻塞。利用子系统振幅的能量相关极展开来求解方程。我们发现静止状态下 α 粒子的莫特跃迁与微扰理论预期的不同，发生在核物质密度的大约 1/10 处。
Among the light nuclear clusters the α-particle is by far the strongest bound system and therefore expected to play a significant role in the dynamics of nuclei and the phases of nuclear matter. To systematically study the properties of the α-particle we have derived an effective four-body equation of the Alt–Grassberger–Sandhas (AGS) type that includes the dominant medium effects, i.e. self energy corrections and Pauli-blocking in a consistent way. The equation is solved utilizing the energy dependent pole expansion for the subsystem amplitudes. We find that the Mott transition of an α-particle at rest differs from that expected from perturbation theory and occurs at approximately 1/10 of nuclear matter densities.