激光金等离子体中Au48+离子的光谱分析和能级寿命

根据扩展的全相对论多组态Dirac-Fock理论,采用"多功能相对论原子结构程序GRASP2(General-Purpose Relativistic Atomic Structure Program 2,1992),考虑量子电动力学(QED)效应和Breit修正,结合惯性约束聚变(ICF)实验室等离子体中已经观察到的激光照射Au元素所产生的一些多重电荷态离子的外壳层共振线跃迁光谱,选取重要的电子组态,计算激光金等离子体中类镓Au48+离子的光谱跃迁波长、能级寿命和能级宽度.计算所得波长值与实验值符合较好,能级寿命与能级宽度的大小关系符合海森堡的能量与时间测不准原理.计算结果对金等离子体中的离子平均寿命、电荷态分布和平均电离度的研究具有一定的参考价值.

Spectrum Analysis and Level Lifetimes of Au48+ in Au Laser Plasma

The results of inertia confinement fusion (ICF) experiment indicate that the spectra of laser Au plasma contains the transitions of 3d→4p, 3d→ 4f and 3p→ 5d of Au48+. Based on the extended relativistic multiconfiguration Dirac-Fock theory and the General-Purpose Relativistic Atomic Structure Program 2 (GRASP2) with quantum electrodynamical effect (QED) and Breit correction, the transition wavelengths, level lifetimes and level widths of Au48+ have been calculated. The transitions mentioned above have been considered in the calculation. The wavelengths obtained are in good agreement with the experimental data available. The relationship between the level lifetimes and the level widths satisfies with the, Heisenberg uncertainty principle. The results provide reference valuable for average ionic lifetime, charge state distribution and average ionization degree of Au plasma.