The basic ideas of the B-spline R-matrix (BSR) approach are reviewed, and the use of the
method is illustrated with a variety of applications to atomic structure, electron–atom …

The past decade has seen extraordinary theoretical progress in the field of fully
kinematically resolved atomic electron-impact ionisation, and its closely related field of …

The way in which atoms and molecules are ionized by the impact of charged particles has
important consequences for the behaviour of many physical systems, from gas lasers to …

We present cross sections for electron-impact ionization and simultaneous ionization plus
excitation of helium by electron impact. The results are obtained from a fully nonperturbative …

We formulate scattering theory in the framework of a surface-integral approach utilizing
analytically known asymptotic forms of the two-body and three-body scattering …

We report the development of the fully relativistic convergent close-coupling method based
on the solution of the Dirac equation. A complete square-integrable Dirac L-spinor basis is …

Single ionization of helium by 70.6-eV electron impact is studied in a comprehensive
experiment covering a major part of the entire collision kinematics and the full 4π solid angle …

Single ionization of helium by 102 eV electron impact has been studied by measuring the
momentum vectors of all final-state particles, ie, two electrons and the He+ ion, with an …

Deep minima in He (e, 2 e) He+ triply differential cross sections are traced to vortices in
atomic wave functions. Such vortices have been predicted earlier, but the present …

A nonperturbative close-coupling technique is used to calculate differential cross sections
for the electron-impact ionization of H 2 at an energy of 35.4 eV. Our approach allows cross …