Positronium (Ps) is an exotic hydrogenic atom composed of an electron bound to a positron
via the Coulomb force. Being composed of two low-mass leptons, positronium is, for all …

Much progress in the theory of positron scattering on atoms has been made in the ten years
since the review of Surko et al (2005 J. Phys. B: At. Mol. Opt. Phys. 38 R57). We review this …

Background Positron emission tomography (PET) traditionally uses coincident annihilation
photons emitted from a positron interacting with an electron to localize cancer within the …

Positronium in the 2 S 3 metastable state exhibits a low electrical polarizability and a long
lifetime (1140 ns), making it a promising candidate for interferometry experiments with a …

We describe an experimental arrangement suitable for performing microwave spectroscopy
measurements of the positronium (Ps) n= 2 fine structure using Ramsey interferometry …

We report experiments in which positronium (Ps) atoms are produced in the 2 S 1 3 level by
single-photon excitation from the ground state. To accomplish this, Stark-mixed n= 2 states …

This article presents a combined experimental and theoretical overview of positronium
collisions with atoms and molecules. It starts with a description of the basic properties of …

We present the convergent close-coupling formulation for positron scattering from noble
gases (Ne, Ar, Kr and Xe) within the single-center approximation. Target functions are …

The convergent close-coupling method with two-centre expansions has been developed to
calculate positron scattering on helium. The method utilizes a multiconfigurational …

We describe the experimental production of a beam of 2 3 S 1 positronium (Ps) atoms
obtained from charge-exchange collisions between a positron beam and Xe held in a gas …