Abstract
The photoionization cross section of Be from $1s^{2}2s2p ^{1}P^{o}$ is studied with the saddle-point complex-rotation method for photon energies from 23 to 117 eV. A full-core plus correlation wave function is used for the initial states. The nonrelativistic energy of this wave function is -14.472984 a.u. For the resonances in the continuum, the energy and width for the singly core-excited Be-like $1s2s2p^{2}\,^{1}S,\, ^{1}P,$ and $^{1}D$ states are calculated to high precision. The Auger decay branching ratios of these states are studied to check the spin alignment theory recently proposed by Chung.