noun
- an unstable atom-like system consisting of an electron and a positron bound together
Usage: physics
Examples
- Positronium has a very short lifetime before the electron and positron annihilate each other.
- Scientists study positronium to better understand antimatter interactions.
- The formation of positronium occurs when a positron captures an electron.
- Positronium exists in two spin states: singlet and triplet.
- Researchers use positronium as a probe in materials science.
- The discovery of positronium helped confirm quantum electrodynamics predictions.