Positronium is the simplest bound state, built of an electron and a positron. Studies of
positronium in vacuum and its decays in medium tell us about quantum electrodynamics …

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 …

An unambiguous observation of the Bose-Einstein condensation (BEC) of excitons in a
photoexcited bulk semiconductor and elucidation of its inherent nature have been …

The variational method complemented with the use of explicitly correlated Gaussian basis
functions is one of the most powerful approaches currently used for calculating the …

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 …

This paper describes a new positron source using ultraintense short pulse lasers. Although it
has been theoretically studied since the 1970s, the use of lasers as a valuable new positron …

This book provides a comprehensive and up-to-date account of the field of low energy
positrons and positronium within atomic and molecular physics. It begins with an …

It has been known for many years that an electron and its antiparticle, the positron, may
together form a metastable hydrogen-like atom, known as positronium or Ps (ref.). In 1946 …

We report a new measurement of the positronium (Ps) 2 S 3 1→ 2 P 3 0 interval. Slow Ps
atoms, optically excited to the radiatively metastable 2 S 3 1 level, flew through a microwave …

This paper is a review of low-energy positron interactions with atoms and molecules.
Processes of interest include elastic scattering, electronic and vibrational excitation …