类铍离子激发态1s22P2 3Pe的能量、精细结构和跃迁波长的计算

采用多组态相互作用方法及Rayleigh-Ritz变分法,计算了类铍离子等电子系列(Z=4-10)激发态1s22p2 3Pe的非相对论能量,利用截断变分方法得到能量改进量,进一步考虑相对论效应和质量极化效应,从而获得了高精度的能量计算值.给出了类铍离子等电子系列激发态1s22p2 3Pe的相对论能量修正和质量极化效应随核电荷数Z变化的情况.同时还计算了激发态1s22p23Pe的精细结构能级和劈裂,以及1s22s2p3Po到1s22p2 3Pe态的辐射跃迁波长.计算结果与其他理论和实验符合得很好.

Relativistic energy, fine structure and wavelength of the low-lying excited state 1s22p2 3pe for a beryllium-like system

The Rayleigh-Ritz variational method is carried out with a multiconfiguration interaction wave function and restricted variational method to obtain the relativistic energies and fine structure of the low-lying state 1s~22p~2~3P~e for the beryllium isoelectronic sequence(Z=4-10).To saturate the wave functional space and to improve the energy,the restricted variational method is used to compute energy contributions from each chosen angular-spin series.To further improve the energy,relativistic corrections and the mass polarization effects are evaluated with the first-order perturbation theory.The relativistic perturbation operators considered in this work are correction to the kinetic energy(P~4),Darwin term,electron-electron contact term,and orbit-orbit interaction.The relativistic energy corrections and the mass polarization effects of the low-lying excited states 1s~22p~2~3P~e for beryllium isoelectronic sequence(Z=4-10) are demonstrated with figures.The oscillator strengths,transition rates and wavelengths are also calculated.The calculated results are compared with other theoretical and experimental data in the literature.