类硼120Sn45+和132Xe49+离子朗德g因子的理论研究OA

When an atom or ion is placed in an external magnetic field,its energy levels split and the energy shift is related to the Landé g factor,a phenomenon known as the Zeeman effect.The Landé g-factor for highly charged state ions(HCIs)provides a good way to test the theory of quantum electrodynamics(QED).In addition,high-precision Landé g-factors have important applications in astrophysics,plasma physics,precision measurement physics and the accurate determination of electron masses as well as fine structure constants.Currently,the accuracy of the Landé g-factor measurements for Ar13+ions and Sn45+ions of B-like has been experimentally achieved to an accuracy of 10-11 using the Penning trap technique.However,the accuracy of the theoretical calculations is much smaller than the accuracy of the experimental measurements,and the theoretical calculations need to accurately include the contributions of electron correlation effects,Breit interactions,QED effects,and nuclear recoil effects.QED effects and nuclear recoil effects on the Landé g-factor were further analysed.For the 2s22p 2P1/2 and 2P3/2 states of Sn45+and Xe49+ions,the contribution to the positive energy state is calculated to be in the range of 10-3 using the MCDHF method,and the contribution to the negative energy state is in the range of 10-5 using the RCICP method,and the contribution to the total electronic correlation effect is in the range of 10-3.The contributions from self-energy(SE)and vacuum polarisation(VP)effects are on the order of 10-7 to 10-5,the correction to the g-factor from the magnetic interaction operator is on the order of 10-4,and the contribution from nuclear recoil effects is on the order of 10-8.The final g-factor value obtained for the 2s22p 2P1/2 state of the Sn45+ion is 0.644798,which is in good agreement with the most accurate experimental measurement to date 0.644 703 826 5(4),with a relative difference of about 9.4×10-5.The Landé g-factor for the 2s22p 2P3/2 state of the Sn45+ion is 1.317 904,and the g-factors for the 2s22p 2P1/2 and 2P3/2 states of the Xe49+ion are 0.640 923 and 1.315 048,respectively,and the theoretical prediction accuracies are also on the order of 10-5.