The autoionizing energy levels of neon-like Al IV

Abstract

The photoionization of the ground state of neon-like ions is investigated, and the autoionizing spectrum of 2 s 22 p 5 ( 2 P 1/2) ns, nd and 2 s2 p 6 ( 2 S 1/2) np Rydberg series of Al IV is studied by using the Breit–Pauli Hamiltonian within the R-matrix theory combining with the QB method of Quigly–Berrington (Quigley L, Berrington K A, Pelan J. Comput Phys Commun 1998;144:225). We predict the autoionizing energy levels and widths of four Rydberg series of Al IV.