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Laser cooling of Positronium
February 29 , 2024
141 days
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- In a first, an international team of physicist’s collaboration has achieved a breakthrough by demonstrating the laser cooling of Positronium.
- This development will allow high-precision measurements of the properties and gravitational behaviour of this exotic but simple matter–antimatter system
- Positronium, comprising a bound electron (e-) and positron (e+), is a fundamental atomic system.
- Due to its very short life, it annihilates with a half-life of 142 nano-seconds.
- Its mass is twice the electron mass and enjoys the unique distinction of being a pure leptonic atom.
- This hydrogen-like system, with halved frequencies for excitation, makes it a great contender for attempting laser cooling.
- The experiment was performed at the European Organization for Nuclear Research, more popularly known as CERN, in Geneva.
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