title: First observation of two-electron one-photon transitions in single-photon K-shell double ionization.
abstract: Experimental evidence for the correlated two-electron one-photon transitions (1s(-2)→2s(-1)2p(-1)) following single-photon K-shell double ionization is reported. The double K-shell vacancy states in solid Mg, Al, and Si were produced by means of monochromatized synchrotron radiation, and the two-electron one-photon radiative transitions were observed by using a wavelength dispersive spectrometer. The two-electron one-photon transition energies and the branching ratios of the radiative one-electron to two-electron transitions were determined and compared to available perturbation theory predictions and configuration interaction calculations.
authors.affiliation: Department of Physics, University of Fribourg, Fribourg, Switzerland. joanna.hoszowska@unifr.ch
authors.forename: J
authors.initials: J
authors.lastname: Hoszowska
authors.forename: J-Cl
authors.initials: JC
authors.lastname: Dousse
authors.forename: J
authors.initials: J
authors.lastname: Szlachetko
authors.forename: Y
authors.initials: Y
authors.lastname: Kayser
authors.forename: W
authors.initials: W
authors.lastname: Cao
authors.forename: P
authors.initials: P
authors.lastname: Jagodziński
authors.forename: M
authors.initials: M
authors.lastname: Kavčič
authors.forename: S H
authors.initials: SH
authors.lastname: Nowak