The study of polarization of atomic radiation emitted after impact excitation has yielded an
enormous wealth of detailed information on the mechanism and dynamics of collisional …

This article reviews a particular area of perturbation theory in which there has been much
activity during the past ten years. This area embraces distorted-wave Born series, the …

This book on Perfect and-or Complete Scattering Experiments as a means for Probing
Quantum Mechanics on Atomic and Molecular Collisions and Coincidences is an approach …

The results of electron-photon coincidence experiments have given a new insight into the
excitation of atoms by electron impact. This article reviews the way in which this new …

The second-order distorted-wave amplitude is evaluated in a high-energy approximation. In
this approximation, the non-local second-order distorting potential is replaced by a local …

The authors have studied the orientation and alignment of the 2 1 P and 3 1 P states of
helium caused by electron impact at incident energies between 50 and 80 eV both …

Several ways of parametrising results of coherence and correlation analysis of atomic
excitation in planar scattering experiments have been suggested over the years. Recently …

The density matrix parametrization of collisionally excited atomic ensembles is generalized
to account for a projectile spin. The elements are related to the “generalized Stokes …

Differential and total cross sections for excitation of the 1 1 S-2 1 P transition in helium under
positron impact were calculated using a distorted-wave approximation. The authors have …

The atomic orientation J⊥+ generated by polarized-electron impact excitation of Hg (6s 2) 1
S 0→(6s6p) 3 P 1 is studied using the electron–photon coincidence technique. J⊥+ shows …