Resonance energies and autoionization widths of the 2p21De, 3d21Ge and 4f21Ie doubly excited states of the helium isoelectronic sequence

The energies and autoionization widths of the 2p21De, 3d21Ge and 4f21Ie doubly excited Feshbach resonances are calculated for Z=1, 2-10. The complex eigenvalue Schroedinger equations are solved. The calculations have been carried out by using the complex rotation method, and analytic real and complex orbitals as basis set functions. Our results are compared to available experimental data and to other theoretical calculations.