We report the first operation of a Ra+ optical clock, a promising high-performance clock
candidate. The clock uses a single trapped Ra+ 226 ion and operates on the 7 s S 1/2 2→ 6 …

We report a high-accuracy measurement of the differential static scalar polarizability Δ α 0 of
the 5 s S 1/2 2− 4 d D 5/2 2 transition of the Sr+ 88 ion. The high accuracy is obtained by …

We investigate the phenomenology of the dark Z boson, Z d, which is associated with a new
Abelian gauge symmetry and couples to the standard model particles via kinetic mixing ϵ …

To search for the lowest energy nuclear isomeric transition in 229 Th in solid samples, a
novel adsorption technique which prepares 229 Th atoms on a surface of CaF 2 is …

A weighted average weak mixing angle θ W derived from relatively low Q 2 experiments is
compared with the standard model prediction obtained from precision measurements. The …

Motivated by recent measurements for several alkali-metal atoms and alkali-metal-like ions,
we perform a detailed study of electric dipole (E 1) transition amplitudes in K, Ca+, Rb, Sr+ …

We have systematically investigated the ground-state hyperfine structure for alkali-metal
atoms Rb 87, Cs 133, and Fr 211 and alkali-metal-like ions Ba+ 135 and Ra+ 225, which are …

In the presence of P-violating interactions, the exchange of vector bosons between electrons
and nucleons induces parity-nonconserving (PNC) effects in atoms and molecules, while the …

Studies of the effects of the weak interaction in atomic systems provide tests of the Standard
Model of particle physics, and explore physics scenarios beyond the Standard Model. In …

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 …