6 papers
Coulomb crystallization of xenon highly charged ions in a laser-cooled Ca+ matrix
Leonid Prokhorov, Aaron A. Smith, Mingyao Xu +17
We report on the sympathetic cooling and Coulomb crystallization of xenon highly charged ions (HCIs) with laser-cooled Ca ions. The HCIs are produced in a compact electron beam…
Characterization of rf field-induced a.c. Zeeman shift in multi-level highly charged ions
Shuying Chen, Lukas J. SpieÃ, Alexander Wilzewski +3
Characterization of the trap rf induced a.c. Zeeman shift is essential for achieving high accuracy in optical ion clocks. In this work, we demonstrate the experimental characteriza…
Excited-state magnetic properties of carbon-like
Lukas J. SpieÃ, Shuying Chen, Alexander Wilzewski +13
We measured the -factor of the excited state in ion to be with a relative uncertainty of . The magnetic field…
Finding the ultra-narrow electric quadrupole transition in Ni ion for an optical clock
Charles Cheung, Sergey G. Porsev, Dmytro Filin +7
The Ni ion features an electronic transition with a natural width of only 8 mHz, allowing for a highly stable optical clock. We predict that the energy of this strongly for…
Nonlinear calcium King plot constrains new bosons and nuclear properties
A. Wilzewski, L. I. Huber, M. Door +39
Nonlinearities in King plots (KP) of isotope shifts (IS) can reveal the existence of beyond-Standard-Model (BSM) interactions that couple electrons and neutrons. However, it is cru…
Identification of highly-forbidden optical transitions in highly charged ions
Shuying Chen, Lukas J. SpieÃ, Alexander Wilzewski +6
Optical clocks represent the most precise experimental devices, finding application in fields spanning from frequency metrology to fundamental physics. Recently, the first highly c…