Electron–ion collisions are among the most important atomic processes in ionized gases.
They comprise elastic scattering, excitation, ionization, and recombination. Theoretical …

▪ Abstract Photoionized clouds are ubiquitous. They define the endpoints of stellar evolution
(H II regions and planetary nebulae), constitute the interstellar and intergalactic media, and …

The recent development of experimental photoionization cross sections of atomic ions has
been reviewed. Owing to the construction of intense undulator-based photon sources it has …

In a joint experimental and theoretical endeavor, photoionization of metastable C 4+(1 s 2 s
S 1 3) ions via intermediate levels with hollow, double-K-vacancy configurations 2 s 2 p, 2 s …

We present experimental data on the state-selective quantum interference between different
pathways of photorecombination, namely, radiative and dielectronic recombination, in the …

Collisional processes and details of atomic structure of heavy many-electron atoms and ions
are not yet understood in a fully satisfying manner. Experimental studies are required for …

Electron-ion collision spectroscopy of the KLL dielectronic recombination (DR) resonances
of hydrogenlike xenon ions was performed at a heavy-ion storage ring with a resolving …

The rate coefficient for radiative and dielectronic recombination of beryllium-like magnesium
ions was measured with high resolution at the Heidelberg heavy-ion storage ring TSR. In the …

The talk contained examples of recent atomic physics experiments with stored and cooled
ion beams from different ion storage-ring facilities. Here, we first introduce the principles of …

Absolute cross-section measurements for resonant double photoexcitation of Li+ ions
followed by autoionization have been performed at high resolution in the photon energy …