Angular distribution and spin polarisation of Auger electrons

Coherence and correlations in photoinduced Auger and fluorescence cascades in atoms

“…One could therefore expect that coincidence measurements on the angular correlation of two subsequently emitted electrons might provide even further details (Kabachnik, 1997;Kabachnik et al, 1999). The recent development of the e-e coincidence experiments have confirmed these expectations.…”

“…For example, the selective excitation of one of the core electrons to an unoccupied Rydberg orbital results in the formation of a highly excited, strongly correlated atomic state which usually decays via electron emission, called resonant Auger transitions. The resonant Auger decay, especially in rare gas atoms, has been studied intensively by means of electron spectroscopy during the last two decades (see review articles by Aksela et al (1996a), Mehlhorn (1998Mehlhorn ( , 2000, Armen et al (2000), Piancastelli (2000), Kabachnik and Ueda (2004), and references therein).…”

“…In these measurements, a certain decay channel is separated and identified by detecting two electrons in coincidence (von Raven et al, 1990;von Raven, 1992;Alkemper et al, 1997). Even more detailed spectroscopic information on the initial-and final-state quantum numbers can be obtained by measuring the angular correlations between the successively emitted electrons in the Auger cascade or Auger electron-fluorescence cascade (Kabachnik, 1997;Kabachnik et al, 1999;Kabachnik and Ueda, 1995). In contrast to the rather common non-coincidence measurements, the coincidence angle resolved experiments, which involve two Auger electrons from a cascade, are still rather scarce Wehlitz et al, 1999;Turri et al, 2001;Ueda et al, 1999aUeda et al, , 2001Ueda et al, , 2003bDa Pieve et al, 2005).…”

“…In some cases these measurements permit one to realize a so-called 'complete' or 'perfect' experiment on the Auger decay, i.e. the experimental determination of the decay amplitudes including their relative phases (Kabachnik and Sazhina, 1990). In quantum mechanics, such measurements are of fundamental importance.…”

Absolute Auger rates, relative intensities and angular distribution for the KLL spectra of Auger electrons from laser-excited sodium

“…This is caused directly by parity conservation and can be seen in analogy to the so-called normal and anomalous parity transitions introduced by Kabachnik and Sazhina (1984).…”