外电场中金属表面附近里德堡氢原子的动力学行为

摘要

The dynamical properties of Rydberg hydrogen atom in an electric field near a metal surface are presented by analyzing the phase space. The dynamical behavior of the excited hydrogen atom depends sensitively on the atom-surface distance and the electric field strength. The evolutions of the Poincar ´e surface of section and the electric orbit are analyzed for a certain atom-surface distance and different electric field strengths. The results indicate that the electric field accelerates the adsorption of electron. With the increase of the electric field strength, the controlling factor of dynamical behavior changes from the atom-surface distance to the electric field strength. As the electric field strength becomes very large, the system is integrable and all the electric orbits become vibrational type of orbits.%利用相空间分析方法研究了外电场中金属表面附近里德堡氢原子的动力学性质。结果表明，体系的动力学性质敏感地依赖于原子与金属表面间的距离和电场强度。通过固定原子与金属表面间的距离，分析了外加电场作用下里德堡电子的Poincar´e截面和运动轨迹的演化过程。研究表明：电场的出现加速了金属表面对电子的吸附，随着电场强度的增加，体系的动力学性质由原子与金属表面间的距离控制逐渐变为由电场起主导作用，体系逐渐由不可积变为可积，电子的运动轨道最终全部变为振动型轨道。