Angular Distribution Of Ejected Electron From The Eu6p_1/28s Autoionizing States With The VMI Method

The rare-earth atom is a sort of complex atoms with an unfull-filled inner shell, which can play an important role in development of novel light sources, laser isotope separation, observation of the universe, and autoionization laser.Not only the study on the spectrum and the dynamics of autoionization Rydberg states of rare-earth atom is important for providing experimental evidence on related study, but also it is helpful to extensively test the quantum theory.In this work, the spectrum of autoionization Rydberg states is investigated using isolated-core excitation and resonance-ionization spectroscopy scheme. Moreover, the autoionization Rydberg states of different energy region are surveyed by different excited scheme, the interseries interaction is discussed. Not only the experimental data, the level energy, the line width and effective quantum number of the spectrum of autoionization Rydberg state are presented, but also the fingerprints of these series are identified which is the complex features superimposed on the top of a broad basis.The papers not only discuss the theory but also reveal the process of simulation, design, and optimizing parameters of of electron lens. Thus, the installation and adjustment is made according to the design parameters. It demonstrates that the aim of design of the system of electron lens is achieved by the experiment test.The spectrum of autoionization Rydberg states, the velocity-mapping image and AD of electron of autoionization states are investigated. Furthermore, the3D photograph is reconstructed by inverse Abel transform and the theory explanation is also given.Moreover, the AD of ejected electron of Eu autoionization states4f76p1/28s is studied by programming, and the change of AD with energy growing is revealed. On one hand, this work will provide experimental evidence for testing the accuracy and validity of the quantum theory. On the other hand, the differential cross-section and the phasic information of wavefunctions are revealed in this work, and the photograph of AD is shown. In sum, through the study on AD, the phasic information of the wavefunctions will promote the research in the experiment and theory in further.In the experiment, not only the accuracy of the wavelength and intensity calibration can be made, but also the laser is made horizontal polarization which is rigid demand, or the inverse Abel transform can not be performed. This work not only enrich the information of spectrum of Eu atom, the AD of ejected electron of autoionization states, but also enrich the experimental methods, such as the velocity-mapping image method which is firstly used in research of Eu atom.