CHINESE JOURNAL OF PHYSICS VOL. 39, NO. 5 OCTOBER 2001

Hylleraas Basis Calculation of the Doubly Excited ^1,3G$^{\rm e}$ States
in Heliumlike Ions

I. A. Ivanov^*1,2 and Y. K. Ho<sup>2

1</sup>Faculty of Science, Northern Territory University, Darwin NT 0909, Australia

²Institute of Atomic and Molecular Sciences, Academia Sinica,

P. O. Box 23-166, Taipei, Taiwan, R.O.C.
(Received April 20, 2001)

For the ions of the helium isoelectronic sequence (Z=1-10) the resonance parameters (positions and widths) of the doubly excited Feshbach resonances of the ^1,3G^e symmetries associated with the N = 3 and N = 4 thresholds of the corresponding hydrogenlike ions have been calculated. The calculations have been carried out by using the complex rotation method, and highly-correlated Hylleraas-type wave functions are used as basis functions.

PACS. 31.25.Jf - Electron correlation calculations for atoms and ions: excited states.
PACS. 31.15.Pf - Variational techniques.

Full Text | Next Article | Previous Article | Contents | CJP mainpage