Single and Double Photoionization of Mg

Single and double photoionization cross sections for Mg are calculated using a time-dependent close-coupling method. The correlation between the two $3s$ subshell electrons of Mg is obtained by relaxation of the close-coupled equations in imaginary time. An implicit method is used to propagate the close-coupled equations in real time to obtain single and double ionization cross sections for Mg. Energy and angle triple differential cross sections for double photoionization at equal energy sharing of $E_1 = E_2 = 16.4$ eV are compared with Elettra experiments and previous theoretical calculations [1].\\[4pt] [1] E. Sokell \emph{et al.}, Phys Rev. Letts. {\bf 110}, 083001 (2013).