Related Experiment Video
Updated: May 29, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
First observation of two-electron one-photon transitions in single-photon K-shell double ionization
J Hoszowska1, J-Cl Dousse, J Szlachetko
1Department of Physics, University of Fribourg, Fribourg, Switzerland. joanna.hoszowska@unifr.ch
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.
Related Concept Videos
UV–Vis Spectroscopy: Molecular Electronic Transitions
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
Atomic Emission Spectroscopy: Instrumentation
Deactivation Processes: Jablonski Diagram
Ionization Energy
Photoelectric Effect

