Potential-barrier effects in inner-shell photoionisation and their influence on the anisotropy of X-rays and Auger electrons

Relativistic-intermediate-coupling calculations of angular distributions in resonant Auger decay

“…The intermediate coupling in the MCDF method can be implemented through the configuration interaction. Under the most common experimental conditions, the angular distribution of Auger electrons induced by a beam of linearly polarized photons can be written in the dipole approximation as [15,18,19] 8'0…”

Spin-resolved Auger electron spectroscopy of barium atoms

“…In contrast, as required by symmetry, for a purely dynamical polarization there exists only a polarization component P±(0) normal to the reaction plane. The alignment is generally small, except in the region of a Cooper minimum or near threshold, where the partial wave with larger angular momentum may be suppressed by a centrifugal barrier [8]. A small alignment in turn results in a small polarization component P±(0) and in a weak angular dependence of the Auger electron intensity.…”

Photoelectron angular distributions and correlations in sequential double and triple atomic ionization by free electron lasers

“…Since the alignment and orientation of the ions are known in various cases from experiment and calculations [49,50], especially for noble gas atoms, one can estimate the expected contribution of the ion alignment and orientation to the angular distribution of the second electron. Consider first 2PDI of np shells of noble atoms.…”