L Gurung, TJ Babij, J Pérez-Ríos, SD Hogan… - Physical …, 2021 - discovery.ucl.ac.uk
We report new measurements of the positronium (Ps) 2 3 S 1→ 2 3 PJ fine-structure
intervals, ν J (J= 0, 1, 2). In the experiments, Ps atoms, optically excited to the radiatively …