Direct measurement of the $7s{}^2{S}_{1/2}\to$ $7p{}^2{P}_{3/2}$ transition frequency in ${}^{226}$Ra${}^{+}$

C. A. Holliman, M. Fan, A. Contractor +2

We report a direct measurement of the $7s{}^2{S}_{1/2}\to$ $7p{}^2{P}_{3/2}$ electric dipole transition frequency in ${}^{226}$Ra${}^{+}$. With a single laser-cooled radium ion we…