原子核物理学的巨大进展(包括理论与实验)

本文根据《九十年代的物理学》(美国,1986年版)一书的内容,结合我们的看法,对近十年来原子核物理学所取得的巨大进展、特别是核物理工作者所关心的问题,进行了简要回顾。     

以巨共振为门口态的多步过程复合核反应

本文分析了以巨共振态为门口态的核反应过程的特点,对FKK理论作了适当修改,推导了以巨共振为门口态的多步过程复合核反应截面的一般公式并给出了扩充的激子模型公式.对以巨偶极共振为门口态的光核反应作了激子模型近似处理及考虑离壳(off-shell)效应后的修正.     

从量子力学与经典力学的相似性看量子体系的建立

本文比较了经典力学与量子力学在数学描述上的相似性，并以这种相似性出发对建立量子力学理论体系的薛定谔图象和海森伯图象等进行了讨论．     

Carbon materials with quasi-graphene layers: the dielectric, percolation properties and the electronic transport mechanism

We investigate the dielectric properties of multi-walled carbon nanotubes (MWCNTs) and graphite filling in SiO₂ with the filling concentration of 2-20 wt.% in the frequency range of 10²-10⁷ Hz. MWCNTs and graphite have general electrical properties and percolation phenomena owing to their quasi-structure made up of graphene layers. Both permittivity ε and conductivity σ exhibit jumps around the percolation threshold. Variations of dielectric properties of the composites are in agreement with the percolation theory. All the percolation phenomena are determined by hopping and migrating electrons, which are attributed to the special electronic transport mechanism of the fillers in the composites. However, the twin-percolation phenomenon exists when the concentration of MWCNTs is between 5-10 wt.% and 15-20 wt.% in the MWCNTs/SiO₂ composites, while in the graphite/SiO₂ composites, there is only one percolation phenomenon in the graphite concentration of 10-15 wt.%. The unique twin-percolation phenomenon of MWCNTs/SiO₂ is described and attributed to the electronic transfer mechanism, especially the network effect of MWCNTs in the composites. The formation of network plays an essential role in determining the second percolation threshold of MWCNTs/SiO₂.     

用近似处理下的扩充激子模型分析巨偶极共振光核反应截面

本文运用扩充的激子模型,在进一步近似下,对²⁰⁸Pb,¹⁸⁶W,¹⁸¹Ta,¹⁷⁵Lu,⁷⁵As,⁵⁵Mn巨偶极共振光核反应进行了计算.计算结果与实验有较好的符合,从而基本支持了我们在前文^[1]所提出的理论框架.