Speaker
Description
How can a tiny antiparticle—the positron—become a powerful tool across both atomic physics and materials science? In this talk, I will demonstrate how low-energy positrons reveal unique insights into defects, interfaces, and atomic interactions. I will introduce the basics of positron annihilation spectroscopy, a non-destructive technique that probes electronic structure and atomic-scale defects. Examples will span from structural defect detection to emerging applications such as positron diffraction experiments, highlighting capabilities that may shape future materials design. I will also emphasize that only a few facilities worldwide—such as those in Germany and Japan—currently operate intense positron sources. Jefferson Lab has a unique opportunity to play a leading role in both high- and low-energy positron research, unlocking new opportunities for fundamental discovery and materials innovation.
