类铍离子激发态1s^22p^2~3P^e的能量、精细结构和跃迁波长的计算  

Relativistic energy,fine structure and wavelength of the low-lying excited state 1s^22p^2~3P^e for a beryllium-like system

作　　者：顾娟[1] 张孟[1] 陈晶[1] 芶秉聪[1] 

机构地区：[1]北京理工大学物理系,北京100081

出　　处：《原子与分子物理学报》2006年第4期606-610,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10374008);教育部博士点基金(20020007036);北京理工大学基础研究基金(BIT-UBF-200307A05)

摘　　要：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.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^23P^e for the beryllium isoelectronie 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 orhit-orhit interaction. The relativistic energy corrections and the mass polarization effects of the low-lying excited states 1s^22p^23P^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.

关 键 词：类铍离子 相对论能量 精细结构 

分 类 号：O562.4[理学—原子与分子物理]