Photoionization with excitation and double photoionization of the Li+ ground 1S1 state and metastable 2S1,3 states

Partial cross-sections for photoionization with excitation of ${\mathrm{Li}}^{+}$ leaving the remaining bound electron in the $1s,$ $2s,$ $2p,$ $3s,$ $3p$, and $3d$ states and total cross-sections for double photoionization have been calculated employing the time-dependent close-coupling method. The calculations include both the ground state $1{s}^{2}\phantom{\rule{0.3em}{0ex}}^{1}S$ and the two lowest metastable excited states $1s2s\phantom{\rule{0.3em}{0ex}}^{1,3}S$. Photon energies below and up to about 200 eV above the respective thresholds for double ionization are considered. Comparisons are drawn mainly with convergent close-coupling results [A. S. Kheifets and I. Bray, Phys. Rev. A 58, 4501 (1998)] and $B$-spline based $R$-matrix results [H. W. van der Hart and L. Feng, J. Phys. B 34, L601 (2001)].