Positronium (Ps) is an exotic hydrogenic atom composed of an electron bound to a positron
via the Coulomb force. Being composed of two low-mass leptons, positronium is, for all …

We report the results of a new measurement of the positronium 2 S 3 1→ 2 P 3 2 (ν 2)
interval. Using a modified experimental arrangement we have significantly reduced the …

We report measurements of the positronium (Ps) 2 S 1 3→ 2 P 2 3 interval in which atoms
traveling in free space were irradiated with microwave radiation generated using a horn …

We describe an experimental arrangement suitable for performing microwave spectroscopy
measurements of the positronium (Ps) n= 2 fine structure using Ramsey interferometry …

We describe the experimental production of a beam of 2 3 S 1 positronium (Ps) atoms
obtained from charge-exchange collisions between a positron beam and Xe held in a gas …

We report the results of a new measurement of the positronium Precision Microwave
Spectroscopy of the Positronium 2 ³S₁→ 2 ³P₂ (v₂) interval. Using a modified …