Theoretical Research On Fine Structure And Dipole Transition Of 1s²nl (l=p,d) States For Zn²⁷⁺ Ion

This thesis first introduced the general situation of atomic and molecular physics, the development and the significance of the research about highly charged ions. Next, it mainly described the theoretical methods and results of calculating the energy structure of the Lithium-like Zn27+ion. The non-relativistic energies of 1s2np and 1s2nd states for this ion are calculated by using FCPC method in the thesis. The mass polarization and relativistic effects are included from the first-order perturbation theory. To get highly accurate results, the higher order relativistic and quantum electrodynamics (QED) contributions to the energy and fine structure splitting are considered by introducing effective nucleus charges. Then the thesis calculated the ionization potentials, excitation energies, fine structure of 1s2np and 1s2nd states and transition energies, wavelengths of 1s2np-1s2n'd for Zn27+ ion. Fine structure splittings of 1s2np and 1s2nd states are composed of the expectations of spin-orbit and spin-other-orbit interactions, QED and higher order relativistic corrections. Moreover, based on the Single Channel Quantum Defect Theory, the thesis calculated the quantum defects of 1s2np and 1s2nd states for Zn27+ ion. The ionization potentials from the FCPC method comply very well with the results from semi-empirical method. Finally, the oscillator strengths for 1s2np-1sn'd for Zn27+ ion are calculated. And then, combining the quantum defect theory with the discrete oscillator strengths, the oscillator strengths are extrapolated to the whole energy region including a highly excited state and continuum levels. The theoretical results in this thesis agree very well with the experimental data available, and provide significant value for reference to the study of abundant of the relative fields of science and research.