Positrons are the antimatter version of electrons and so their fate in a matter world is ultimately to annihilate. However, prior to this, a positron may combine with an electron to form a matter-antimatter hybrid called positronium. This is akin to a hydrogen atom with the proton replaced by a positron. Fundamental to our understanding of the physical universe, positron and positronium are these days also acknowledged as being fantastically useful in practical applications such as probing material properties and medical diagnostics. However, there is still much that we do not know for sure about the details of the interactions of these particles with ordinary matter. For example if, in a collision with an atom or molecule, a positron captures an electron, in which directions is the positronium likely to travel and with what probability? More...
Published: Jun 17, 2015 12:35:19 PM
How light of different colours is absorbed by carbon dioxide (CO2) can now be accurately predicted using new calculations developed by a UCL-led team of scientists. This will help climate scientists studying Earth’s greenhouse gas emissions to better interpret data collected from satellites and ground stations measuring CO2. More...
Published: Jun 15, 2015 10:29:10 AM
New research from UCL has uncovered additional second laws of thermodynamics which complement the ordinary second law of thermodynamics, one of the most fundamental laws of nature. These new second laws are generally not noticeable except on very small scales, at which point, they become increasingly important. More...
Published: Feb 10, 2015 11:55:53 AM
Atomic, Molecular, Optical and Positron Physics
The Atomic, Molecular, Optical and Positron Physics (AMOPP) group explores many different topics and has both experimental and theoretical research programs in the following areas.
- Positron-, Positronium-, Electron-Collisions
- Ultracold Gases
- Ultrafast laser spectroscopy and Strong Laser Interactions
- Biological Physics
- Theoretical Physics of Molecules and Quantum Systems
- Quantum Information
This research spans the range from the fundamental to the applied. We perform high precision measurements coupled with theoretical work, which are aimed at improving our understanding of fundamental processes. The applications of this improved understanding to areas as diverse as the development and structure of the universe, environmental change, and the behaviour of biological systems. To find out more about our current research activities and the group in general, please click on the links above.
We have a number of PhD studentships available.