Theoretical Study On The Scaling Laws Of Lithium-like Isoelectronic Sequence

The energy structure and spectral characteristics of highly ionized atomic systems with larger nuclear charges are closely related to some important research fields of national defense and aerospace.The study on highly ionized atomic systems along the isoelectronic sequence can not only reveal the basic laws of related physical interactions and characteristics of structure within the system,but also provide basic reference data for related research.Therefore,experimental and theoretical research on highly ionized atomic systems is one of the important topics in atom and molecular physics.In this work,the energy structure and transition behavior of 1s~22s and 1s~22p configurations along lithium-like isoelectronic sequences(Z=40,50,60,70,74,80,83,90,92)are studied theoretically using the multi-configuration Dirac Fock method.Based on the wave function constructed,the influence of different electron excitation modes on the number of configuration wave function and results calculated is analyzed and discussed,and the reasonable and effective description of electronic correlation is determined.Then,after fully considering the higher-order corrections such as quantum electrodynamics effect,transverse field interaction and nuclear mass effect,the contributions of different physical effects to the energy levels of all states of 1s~22s and 1s~22p configurations along lithium-like isoelectronic sequences are calculated.The theoretical calculations of energy levels,charge density at the nucleus,transition rate,oscillator strength are completed using the program package GRASP2K.It can be found that the calculated results obtained in this work are in good agreement with existing experimental data and other theoretical results.In addition,in order to make further understanding of the physical effects within the many electrons system,the scaling laws of the energy structures and transition parameters of1s~22s and 1s~22p configurations along lithium-like isoelectronic sequences(Z=40,50,60,70,74,80,83,90,92)are studied systematically,the quantum electrodynamics effect,transverse field interaction,nuclear mass effects and radiative transition related physical quantities,such as transition rate,oscillator strength,etc.,along the isoelectronic sequence are analyzed,which provide some reference for discovering the competitions among various physical interactions within the system.