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arXiv · 2002.08290

Nd$^+$ isotope shift measurements in a cryogenically-cooled neutral plasma

Nishant Bhatt·Kosuke Kato·Amar C. Vutha
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Abstract

We report measurements of the isotope shifts of two transitions ($4f^46s\rightarrow [25044.7]^{\circ}_{7/2}$ and $4f^46s\rightarrow [25138.6]^{\circ}_{7/2}$) in neodymium ions (Nd$^+$) with hundredfold improved accuracy, using laser spectroscopy of a cryogenically-cooled neutral plasma. The isotope shifts were measured across a set of five spin-zero isotopes that spans a nuclear shape transition. We discuss the prospects for further improvements to the accuracy of Nd$^+$ isotope shifts using optical clock transitions, which could enable higher precision tests of King plot linearity for new physics searches.

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Nishant Bhatt, Kosuke Kato, Amar C. Vutha. 2020-02-19. Nd$^+$ isotope shift measurements in a cryogenically-cooled neutral plasma. https://doi.org/10.1103/physreva.101.052505

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