The Relativistic Research Of Neutral Sr And Rb Atomic

The large-scale program GRASP based on MCDF theory has been mature in calculating atomic wave function,and can be widely used in astrophysics,laser nuclear physics,medicine,life sciences,atomic frequency clock and other interdisciplinary disciplines.It can solve the difficulties that independent disciplines can not solve before.How to improve the accuracy of calculation and make the results more real and effective to reflect the atomic wave function is particularly important,which depends on how to choose a suitable configuration space expansion mode.Based on the above background,this paper is focused on calculating the atomic wave function by MCDF method,and further help us to understand the true information of the nucleus.This work mainly includes four parts:Firstly,for neutral Sr atom,the electron configuration space is expanded to the quasi-complete basis group?n?10?in the form of energy level,to express the atomic wave functions of the ground state energy level 5s^{2 1}S₀ and excited state energy level 5s5p ³P_0,1,2,1,2 and5s5p ¹P₁ of neutral Sr atom.The contributions of S,D and T excited electrons to different observable measurements are quantitatively discussed by observable measurements of energy level spacing,isotope shifts,hyperfine structure and transition probability.The calculation results show that the energy level spacing between 5s5p ³P_0,1,2,1,2 and 5s5p ¹P₁ and the ground state energy level 5s^{2 1}S₀ is less than 1%.Discuss the Sr isotopes of ⁸⁴Sr-⁸⁶Sr two different transition level 5s²¹S₀-5s5p ³P₁ and 5s^{2 1}S₀-5s5p ¹P₁ isotope shift,get the calculation error of IS less than 2.3‰and1.56%,respectively,on the basis of the calculation of ⁸⁸Sr-^80-90Sr isotope quality of normal mass shift?NMS?,special mass shift?SMS?,the field shift?FS?,and get satisfactory isotope shift?IS?the calculation results,further calculation method IS applied to the ^80-90Sr between different isotope IS the result.Finally,the hyperfine structure of the excited state energy levels 5s5p ³P_1,2and 5s5p ¹P₁ and the transition probability of two different energy levels 5s^{2 1}S₀-5s5p ³P₁ and 5s²¹S₀-5s5p ¹P₁ are calculated respectively,and the influence of the number of T excited electrons of S,D and on the calculation results is discussed quantitatively.Secondly,the energy level spacing of D₁ line(5s_1/2-5p_1/2)and D₂ line(5s_1/2-5p_3/2)of neutral Rb atom is calculated by using the method similar to that of neutral Sr atom.At the same time,the isotope shift and hyperfine structure constant of ⁸⁵Rb-⁸⁷Rb are calculated in detail,the numerical analysis and variation trend are given quantitatively,and the nuclear dipole distance and quadrupole moment of Rb are deduced.Finally,this work is summarized and prospected,and the next step is to apply the existing calculation methods to more Sr-like ion calculations,so that the calculation methods can be effectively promoted,laying a theoretical foundation for relevant experimental work in the laser nuclear physics laboratory of Lanzhou University.