Accurate Calculations Of Atomic Data Relevant In Nuclear Physics

In 1909,Rutherford first estimated the size of nuclei.The size and deformation of nuclei have always been an important research issue in nuclear physics.In traditional atomic structure calculations,nuclei are often described as point charge models without geometry,in fact,the nucleus is a microstructure that is composed of protons and neutrons with the finite mass,size and different shape.The fine effect of atomic models on atomic energy levels and wave functions is called the nuclear volume effect.The interaction between nuclei and extra core electrons?which is mainly expressed by hyperfine and isotope shift?,it can be used as an effective tool to detect the properties of the nucleus,which is a cross research field involving atomic physics and nuclear physics.This paper is based on the multiconfiguration Dirac-Hartree-Fock?MCDHF?theory method,using the active space method to construct computational model to consider the influence of electron-electron correlation effect and obtain electron wave function.This method ensures the accuracy of the required physical quantities and greatly improves the computational efficiency.On this basis,we calculated preciously the 134 fine-structure energy levels of the3 p⁶3d²,3 p⁶3d4s,3 p⁵3 d³ and 3 p⁶ 3d4 p configurations in Fe VII.we compare our results with previous calculation results and NIST experimental results,we find that our results are better than others and our results have a good agreement with NIST database.Another,we also get the electric dipole transition rates and electric quadrupole transition rates and the oscillator strengths,which makes a comparison with others'results and we get the pretty good results with experimental measurements.Another,we calculated the isotope shift parameters for the long and short lives isotopes about the two energy transitions3s ²S_1/2-3p ²P_1/2 and3s ²S_1/2-3p ²P_3/2of Mg⁺ion by using the restricted excited method,which have a important application on researching the nuclear charge radii,cold atom physics,astrophysics and the fine structure constant variation.