A numerical Hartree self-consistent field calculation of an autoionization resonance parameters for a doubly excited 2s2, 3s2, and 4s2 states of He atom with a complex absorbing potential
Tsednee Tsogbayar †, Yeager Danny L
       

(color online) The η-trajectories for (black diamonds) and (blue diamonds) for the 2s state of the He atom. Crosses are for and and the Padé extrapolated values (end point of the green line), respectively. The computational parameters are N = 256, b = 60 a.u. (panels (a) and (b)), and a.u. (a) and 10 a.u. (b), respectively. The values of strength parameter for (black crosses) are 2.1 (a) and 2.2 (b), respectively. The (blue crosses) are 4.7 (a) and 5 (b), respectively and (panels (a) and (b)).