Absolute frequency measurement of the 7s${}^2$ ${}^1$S${}_0$ $-$ 7s7p ${}^1$P${}_1$ transition in ${}^{225}$Ra

B. Santra, U. Dammalapati, A. Groot +2

Transition frequencies were determined for transitions in Ra in an atomic beam and for reference lines in Te${}_2$ molecules in a vapor cell. The absolute frequencies were calibrated…