Abstract: According to the transnational periodically symmetry of crystal plane in its space, author introduce the Thomas-Fermi equation in crystal planar channeling electric fields; then calculate the electric fields of single crystal Si(110) and its critical angle. The good fits with the experimental data are obtained. The results show that the Thomas-Fermi equation in crystal planar channeling may describe the characters of planar channeling.

Key words: planar channeling, atomic kernel, critical angle

摘要： 根据同一晶向的晶面具有平移周期对称性，将托马斯-费米方程引入晶体的平面沟道中求解Si(110)平面沟道内的电场；然后把求得的结果用于计算平面沟道临界角。结果表明：用托马斯-费米方程求得的平面沟道场能较好地描述Si(110)平面沟道内的电场特征。

关键词: 平面沟道, 原子实, 临界角