The interaction of extreme ultraviolet (XUV) photon with matter is a meaningful way to understand the electronic structure of microscopic particles. In this paper, the electron angular distributions of single ionization and double ionization of Ne and Xe atoms interacting with XUV photons are investigated by utilizing a reaction microscope. The asymmetric parameters of 2p electrons of Ne atoms, and 5p, 5s electrons of Xe atoms combined with the reported experimental data are compared with different theoretical models. The result shows that the electron correlation effect can be ignored in the ionization of 2p electron of Ne atoms. While the ionization of 5p electron of Xe atoms is strongly influenced by the electron correlation effect, but not affected by the relativistic effect. Both of these two effects play an important role in 5s shell ionization of Xe atom. In addition, this study also finds that direct double ionization and indirect double ionization exist simultaneously during the ionization of Xe and the photoelectron angular distributions and asymmetry parameters of the first and second steps in indirect double ionization are given.

In the past two decades,the development of laser technology has made attosecond science become a cutting-edge research field,providing various novel perspectives for the study of quantum few-body ultrafast evolution.The attosecond pulses prepared in the current laboratory are widely used in experimental research in the form of isolated pulses or pulse trains.The ultrafast changing light field allows people to control and track the motion of electrons at the atomic-scale,and realizes real-time tracking of electron dynamics on the sub-femtosecond time-scale.This review focuses on the progress in the study of ultrafast dynamics of atoms and molecules,which is an important part of attosecond science.Firstly,the generation and development of attosecond pulses are reviewed,mainly including the principle of high-order harmonic and the separation method of single-attosecond pulses.Then the applications of attosecond pulses are systematically introduced,including photo-ionization time delay,attosecond charge migration,non-adiabatic molecular dynamics and so on.Finally,the summary and outlook of the application of attosecond pulses are presented.