A wide range of exotic bound systems incorporating antiprotons (atoms, atomic ions,
molecules or molecular ions) can be formed, in many cases simply by replacing at least one …

The positronium ion Ps–is often qualitative described as a positronium Ps with a loosely
bound second electron, since the value of the annihilation rate for Ps–is nearly equal to that …

We report on the anisotropic photodetachment of positronium negative ions, followed by the
dissociation into p-wave electrons and positronium atoms, with a linearly polarized laser …

The resonance energies and widths of the P-wave states of helium and of the positronium
ion are studied under the hypothesis that their constituting particles interact trough pure or …

Positronium (Ps) exhibits the ability to form energetically stable complexes with atoms and
molecules before annihilation occurs. In particular, F, a halogen, shows the highest reported …

The multicomponent density functional theory is faced with the challenge of capturing
various types of inter-and intraparticle exchange-correlation effects beyond those introduced …

Positronium hydride (PsH) is a weakly bound (molecular) state of two electrons (e−), a
positron (e+), and a proton (p+). Due to the e−− e+ annihilation, it decays to a number of …

Decay rates of the positronium hydride PsH, a bound state of a proton, a positron, and two
electrons, are determined for two rare channels, PsH→ p+ e− γ and PsH→ p+ e−. Previous …

The quantum theory of atoms in molecules, QTAIM, is used to identify atoms in molecules,
AIM, and quantify their interactions through the partitioning of molecule into atomic basins in …

The total energy and other bound state properties of the ground (bound) 1 1 S-state in the
Ps−(or e− e+ e−) ion are determined to very high accuracy. Our best variational energy for …