In recent years, there has been a wealth of new science involving low-energy antimatter (ie,
positrons and antiprotons) at energies ranging from 10 2 to less than 10-3 eV. Much of this …

This paper is a review of new developments in the experimental field of the efficient
emission of the positronium negative ion, a bound state of one positron and two electrons …

The field of experimental positronium physics has advanced significantly in the last few
decades, with new areas of research driven by the development of techniques for trapping …

When an electron binds to its anti-matter counterpart, the positron, it forms the exotic atom
positronium (Ps). Ps can further bind to another electron to form the positronium negative …

We constructed a new apparatus, built upon a trap-based slow positron beam, for the
production of a collimated, energy-tunable positronium beam under ultra-high vacuum …

Recent findings on the similarity between electron and positronium scattering at the same
velocity [Brawley et al., Science 330, 789 (2010)] have guided us towards the realization of a …

We studied the stability of a system consisting of a positron (e+) and two lithium anions,[Li−;
e+; Li−], using first-principles quantum Monte Carlo calculations combined with the multi …

Positronium (a hydrogen-like bound state of an electron and a positron) is a convenient
probe to determine the sizes of subnanometric free volumes (voids) in condensed matter. A …

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 …

Positronium is a bound state of one electron and one positron. It can be seen as the lightest
neutral'atom'. It can also be seen as a neutralized electron or a neutralized positron. Since …