Argon KLL Auger spectrum: Initial states, core-hole lifetimes, shake, and knock-down processes

KLL Auger decay in free aluminum atoms

The KLL Auger transitions in free atoms present the simplest nonradiative electronic decay channel and therefore are of fundamental theoretical interest. Atomic spectra are advantageous for detailed theoretical analysis because the solid-state and molecular environments cause additional demands for the interpretation of spectra. Besides Ne 1,2 and Ar 3 rare gases, only the KLL spectra of Na 4 a...

Double Core-hole States in Six 4 (x = F, Cl, Br, and Ch 3 ) Molecules Derived by Photoelectron and Kll Auger Spectroscopy

Multielectron Spectroscopy : Auger decays of the Argon 2p hole

All the different Auger decay paths of Argon 2p holes have been characterized using a time of flight spectrometer of the magnetic bottle type. All electrons (the photoelectron and up to three Auger electrons) are detected in coincidence and resolved in energy. Double Auger decay is shown to proceed either through a direct process or by intense cascade paths, implying highly excited autoionizing...

Auger electron angular distribution of double core-hole states in the molecular reference frame.

The Linac Coherent Light Source free electron laser is a source of high brightness x rays, 2×10(11) photons in a ∼5 fs pulse, that can be focused to produce double core vacancies through rapid sequential ionization. This enables double core vacancy Auger electron spectroscopy, an entirely new way to study femtosecond chemical dynamics with Auger electrons that probe the local valence structure ...

Valence-hole localization in core-valence doubly ionized states of ionic molecules and its impact on KLV Auger spectroscopy

The complete spectra of core-valence dicationic states, i.e., states with one vacancy in the core and one in the valence shell, of the molecules BF3 , AlF3 , BCl3, and AlCl3, are investigated by the Green’s-function method. An analysis of the double-hole density in the corresponding correlated states shows that when the core hole is on a ligand ~halogen! atom, the valence hole is also strongly ...