Abstract
The energy and Auger width for the singly core-excited Be-like $1s2s^2 2p\;{}^3 P^{o}$, $(1s2s)^3 S,2p^2 \; {}^3 P$,\ $(1s2s)^1 S,2p^2\;{}^3 P$,\ $1s2s2p^{2}\;{}^{3}S$,and ${}^3 D$ states are calculated using a saddle-point complex-rotation method. The decay branching ratios of these states are calculated to check the spin-alignment dependent theory recently proposed by Chung (K. T. Chung, to be published). In addition, we have calculated the photoionization cross section (PICS) from the Be $1s^2 2s2p\; {}^3 P^o$ state. A full-core plus correlation wave function with E=-14.566901 a.u. is used for this initial state. We found that although the Auger width of the $(1s2s)^3 S,2p^2 \;{}^3 P$ is smaller than that of $(1s2s)^1 S,2p^2\; {}^3 P$ by a factor of 2.5, its peak PICS is larger than that of the latter by a factor more than 300.