title: Direct versus sequential double ionization of Mg with extreme-ultraviolet radiation.
abstract: We present an ab initio calculation of multiphoton double ionization in atomic magnesium, the first of its type in an atom with a complex core, showing that direct correlated double electron ejection can be studied through analysis of the photoelectron energy spectrum, using currently or upcoming extreme-ultraviolet radiation sources.
authors.affiliation: Institute of Electronic Structure and Laser, F.O.R.TH, Heraklion 711 10, Crete, Greece.
authors.forename: L A A
authors.initials: LA
authors.lastname: Nikolopoulos
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakajima
authors.forename: P
authors.initials: P
authors.lastname: Lambropoulos