Measurement of the ${\text{1}}^{\text{3}}{\text{S}}_{\text{1}}\to {\text{2}}^{\text{3}}{\text{S}}_{\text{1}}$ interval in positronium using field-ionization of Rydberg states

Michael W. Heiss, Lucas de Sousa Borges, Artem Golovizin +1

We report a new 40 ppb measurement of the positronium ${\text{1}}^{\text{3}}{\text{S}}_{\text{1}}\to {\text{2}}^{\text{3}}{\text{S}}_{\text{1}}$ interval using pulsed two-photon optical spectrosc…