Analysis of the fractal intrinsic quality in the ionization of Rydberg helium and lithium atoms

作     者：张延惠 徐秀兰 康丽莎 蔡祥吉 唐旭 Yanhui Zhang1,Xiulan Xu1, Lisha Kang1, Xiangji Cai2, and Xu Tang1

作者机构：College of Physics and ElectronicsShandong Normal University School of PhysicsShandong University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2018年第27卷第5期

页      面：166-171页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Project supported by the Natural Science Foundation of Shandong Province,China(Grant No.ZR2014AM030) partially supported by the Program for Outstanding PhD Candidate of Shandong University,China 

主　　题：ionization dynamics Rydberg atoms fractal rhythm kinetic energy spectrum 

摘      要：We study the fractal rhythm in the ionization of Rydberg helium and lithium atoms in an electric field by using the semiclassical method. The fractal structures present a nested relationship layer by layer in the initial launch angles of the ionized electrons versus the escape time, which is defined as the rhythm attractor, and exhibit similar rhythm endings. The gradually enhanced chaotic regions of the escape time plots tend to broaden as the scaled energy increases. In addition,the fractal rhythm changes synchronously with the oscillations of the kinetic energy spectrum. We note that the intrinsic quality of the fractal rhythm is closely related to the kinetic energy distribution, that is, the inherent dynamic properties of the Hamiltonian equations have an impact on the fractal regularities. In addition, different ionizing closed trajectories exhibit iterate properties and the inherent beauty of symmetry. Our results and analysis can not only reveal new laws in the ionization of Rydberg atoms, but also promote the establishment of the dynamic mechanism of fractals.