The Development Of Auger Electron Spectroscopy And Ar By Fast Electron Impact Study

The main contents of this dissertation include two parts. The first is to design and construct an Auger electron spectrometer, and the other is to study the inner-shell excitations of 2p electrons of argon with the method of the electron energy loss spectroscopy.In chapter 1, the purpose of establishing the Auger electron spectrometer is introduced. First, the basics of Auger effect are given. Then the studies of Auger spectroscopy based on synchrotron radiation are described briefly. Finally, the applications of Auger spectroscopy based on electron excitation in atomic and molecular physics are described in detail, and we learn that the Auger electron spectrometer can be used to study the inner shell, inner valence shell and autoionization states of atoms and molecules.In chapter 2, the design and construction of Auger electron spectrometer are expatiated in detail. First, the overall design and structure of the spectrometer are present. And then each component of the spectrometer, i.e., electron gun, reaction chamber, electric lens, analyzer, high vacuum system, power supply system, computer data acquisition and processing system, are described in detail.In chapter 3, electron energy loss spectra of inner-shell excitations of 2p electrons of argon are measured at an incident electron energy of 2500 eV and scattering angles of 0°and 4°. The dipole-allowed and dipole-forbidden transitions are observed in the measured spectra and assigned based on the calculations of the Cowan code. The positions and line widths for the excitations are determined.The final part is the summarizations of the dissertation and the prospects for the future works.