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

摘要

Partial cross-sections for photoionization with excitation of 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 1s(2) S-1 and the two lowest metastable excited states 1s2s S-1,S-3. 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)].