Recent advances in the study of solid surfaces and thin films using variable-energy positron
beams are reviewed. In the first part the authors discuss the process of positron moderation …

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 …

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 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 …

Slow positrons can be obtained by moderating the energetic β+ particles from a radioactive
source. We find that solid Ne makes a more efficient moderator than any other material …

A beam of 400-eV positrons is partially transmitted through a 40-Å C film in vacuum.
Measuring the γ-ray energy spectrum with a downstream Ge (Li) detector, a new γ-ray peak …

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 …

Within the last decade powerful methods have been developed to study surfaces using
bright low-energy positron beams. These novel analysis tools exploit the unique properties …

In the past few years, there has been rapid growth in the positron annihilation spectroscopy
(PAS) of overlayers, interfaces, and buried regions of semiconductors. There are few other …

Progress in the ability to accumulate and cool positrons and antiprotons is enabling new
scientific and technological opportunities. The driver for this work is plasma physics research …