Theoretical Study On The Photoionization Of The Excited State 3d¹⁰4p²P_1/2 Of Copper Atom

In the field of atom and molecule,atomic structure,dynamic processes,atomic spectrum and collision process are very important directions.Atomic spectrum is widely used in astrophysics,plasma physics and atmospheric science.Atomic spectroscopy is also an important means of molecular chemistry,geology,metallurgy,mining,medicine laboratories.The main results of the interaction between photons and atoms are atomic photoexcitation,photoionization,photoelectric effect or photodissociation.These effects are that the matter absorbs photon energy and the photon disappears.In the process of photoionization,electrons break away from the bonds of atoms and form free electrons,which are called photoelectrons.In this paper,based on multiconfiguration Dirac-Hartree-Fock?MCDHF?methods and relativistic configuration interaction?RCI?theory the photoionization process of excited state3d¹⁰4p²P_1/2/2 of copper atom is studied theoretically.Chapter one briefly introduces the physical image of photoionization process and the research progress of copper atom.Chapter two briefly introduces the Dirac-Hartree-Fock method and Fano theory of photoionization cross section.In chapter three,the wave functions and energy level structures of the single excited state 3d¹00 4p ²P_1/2,the doubly excited states 3d⁹4s?³D?5s ⁴D_3/2,3d⁹4s?³D?5s ⁴D_1/2,3d⁹4s?³D?5s ²D_3/2,3d⁹4s?¹D?5s ²D_3/2/2 and the ionic state 3d^{10 1}S₀ were calculated in three different correlation models C₁,C₂ and C₃,which were based on multiconfiguration Dirac-Hartree-Fock methods and relativistic configuration interaction theory.By analyzing the results of the three correlation models,we find that the energy level structure of copper atom is extremely sensitive to the selection of the correlation model,and the energy level structure obtained in C₃ of the correlation model is in better agreement with the experimental results,so C₃ of the correlation model is reasonable.Based on the wave function and energy level calculated in the correlation model C₃,the Auger width and related Fano parameters of the double excitation resonance 3d⁹4s?³D?5s ⁴D_3/2,3d⁹4s?³D?5s ⁴D_1/2,3d⁹4s?³D?5s ²D_3/2,3d⁹4s?¹D?5s ²D_3/2/2 are further calculated,and the photoionization cross section of single excited state 3d¹⁰4p ²P_1/2/2 is given by using Fano theory,in which direct photoionization and photoinduced autoionization interference are considered.The chapter four gives the summary and prospect of this paper.