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- W2914542458 abstract "The unstable radium nucleus is appealing for probing new physics due to its high mass, octupole deformation and energy level structure. Ion traps, with long hold times and low particle numbers, are excellent for work with radioactive species, such as radium and radium-based molecular ions, where low activity, and hence low total numbers, is desirable. We address the challenges associated with the lack of stable isotopes in a table-top experiment with a low-activity ($sim 10 mumathrm{Ci}$) source where we laser-cool radium ions to form radium Wigner crystals. With a laser-cooled radium ion we measured the $7p ^2P_{1/2}^o$ state's branching fractions to the ground state, $7s ^2S_{1/2}$, and a metastable excited state, $6d ^2D_{3/2}$, to be $p=0.9104(7)$ and $0.0896(7)$, respectively. With a nearby tellurium reference line we measured the $7s ^2S_{1/2} rightarrow 7p ^2P_{1/2}^o$ transition frequency, 640.09663(6) THz." @default.
- W2914542458 created "2019-02-21" @default.
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- W2914542458 date "2019-01-28" @default.
- W2914542458 modified "2023-09-27" @default.
- W2914542458 title "Measurement of $7p ^2P_{1/2}^o$ branching fractions with laser-cooled $^{226}mathrm{Ra}^+$" @default.
- W2914542458 hasPublicationYear "2019" @default.
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