Calculations For The Autoionization States Of Lithium-Like System By Saddle-Point Complex-Rotation Method

Investigations of the exited states of atom is an important researchfield of atomic physics, while the study of autoionization states ofatomic system is valuable for it. An important means for the study ofatomic structure is theoretical calculation.Recently, the saddle-point complex-rotation method is found to beresultful for the calculation of autoionization states. As an evolution ofthe traditional CI method, FCPC (full-core-plus correlation) method isadvantageous for the problem of correlation effects, since it improvesthe convergence. It will be more valuable for the investigation ofautoionization states to combine all the above method in use.In this paper, we investigate the autoionization states of thelithium-like system by using saddle-point method as well as FCPCmethod. We calculated some ~2p~0 and ~4p~e states of the He- system at firstand then the [(1s3p)~3P,3p] ~4p~e and [(1s3p)~3p,3p] ~4P~e states of lithiumioselectronic sequence. Throw the theoretical calculation, we investigatethe change of autoionization widths as the change of the nuclear charge-Z and the change of relative correction as the change of nuclear charge.Some other relational interesting questions are also discussed in thispaper.