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arXiv · 2405.02416

Laser Resonance Chromatography of $^{229}$Th$^{3+}$ in He: an ab initio investigation

Giorgio Visentin·Anastasia Borschevsky·Larry A. Viehland·Stephan Fritzsche·Mustapha Laatiaoui
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Abstract

We propose a laser resonance chromatography (LRC) experiment on $^{229}$Th$^{3+}$, with the goal of detecting the ion's electronic ground $5f$ $^2$F$_{5/2}$ state and metastable $7s$ $^2$S$_{1/2}$ state by means of their ion mobilities. To this end, we first model the ion-neutral interaction potentials for the two electronic states with a relativistic Fock space coupled cluster method and complete basis-set extrapolation scheme. The interaction potentials are used to simulate the state-specific reduced ion mobilities in terms of the operating temperature and the external electric field. The ion mobilities differ by more than 7% at 300 K and moderate field strengths; thus, separation of the $^{229}$Th$^{3+}$ metastable state lies within the reach of LRC experiments targeting optical probing and monitoring of the nuclear clock transition in this isotope.

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Giorgio Visentin, Anastasia Borschevsky, Larry A. Viehland, Stephan Fritzsche, Mustapha Laatiaoui. 2024-05-03. Laser Resonance Chromatography of $^{229}$Th$^{3+}$ in He: an ab initio investigation. https://doi.org/10.1103/physreva.110.023105

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