Determination of quantum defect for the Rydberg P series of Ca II

Arezoo Mokhberi, Jonas Vogel, Justas Andrijauskas +3

We present an experimental investigation of the Rydberg 23 P${}_{1/2}$ state of laser-cooled ${}^{40}$Ca${}^{+}$ ions in a radiofrequency ion trap. Using micromotion sideband spectroscopy…