Measurements of electric quadrupole transition frequencies in 226Ra+

C. A. Holliman, M. Fan, A. M. Jayich
PRA 100, 062512 (2019)

We report the first driving of the 7s 2S1/2 → 6d 2D3/2 and 7s 2S1/2 → 6d 2D5/2 electric quadrupole (E2) transitions in Ra+. We measure the frequencies of both E2 transitions and two other low-lying transitions in 226Ra+ that are important for controlling the radium ion’s motional and internal states: 6d 2D3/2 → 7p 2Po3/2 and 6d 2D5/2 → 7p 2Po3/2.