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arXiv · 2409.09873

Spectroscopy of electric dipole and quadrupole transitions in $^{224}$Ra$^+$

Spencer Kofford·Haoran Li·Robert Kwapisz·Roy A. Ready·Akshay Sawhney·Oi Chee Cheung·Mingyu Fan·Andrew M. Jayich
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Abstract

We report on spectroscopy of the low-lying electronic transitions in $^{224}$Ra$^+$. The ion's low charge to mass ratio and convenient wavelengths make $^{224}$Ra$^+$ a promising optical clock candidate. We measured the frequencies of the the $^2{S}_{1/2} \ $$\leftrightarrow$$\ ^2{P}_{1/2}$ cooling transition, the $^2{S}_{1/2}\ $$\leftrightarrow$$\ ^2{D}_{5/2}$ clock transition, the $^2{D}_{3/2} \ $$\leftrightarrow$$\ ^2{P}_{3/2}$ electric dipole transition, and the $^2{D}_{5/2} \ $$\leftrightarrow$$\ ^2{P}_{3/2}$ cleanout transition. From these measurements we calculate the frequencies of the $^2{D}_{3/2}\ $$\leftrightarrow$$\ ^2{P}_{1/2}$ repump transition, the $^2{S}_{1/2} \ $$\leftrightarrow$$\ ^2{D}_{3/2}$ electric quadrupole transition, and the $^2{S}_{1/2} \ $$\leftrightarrow$$\ ^2{P}_{3/2}$ electric dipole transition.

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Spencer Kofford, Haoran Li, Robert Kwapisz, Roy A. Ready, Akshay Sawhney, Oi Chee Cheung, Mingyu Fan, Andrew M. Jayich. 2024-09-15. Spectroscopy of electric dipole and quadrupole transitions in $^{224}$Ra$^+$. https://doi.org/10.1103/physreva.111.032802

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