Isotope-shift spectroscopy with narrow optical transitions provides a benchmark for atomic
structure calculations and has also been proposed as a way to constrain theories predicting …

Laser cooling and trapping of the heavy alkaline-earth-metal element barium has been
achieved based on the strong 6 s 2 S 1 0-6 s 6 p P 1 1 transition. The excited state decays to …

We describe repumping and spectroscopy of laser-cooled strontium (Sr) atoms using the
(5s5p) 3 P 2–(5s4d) 3 D 2 transition. Atom number in a magneto-optical trap is enhanced by …

Violation of linearity of the King plot is investigated for a chain of partially stripped argon
isotopes. The nonlinearity originates within the standard model from subtle contributions to …

Addressing the optical clock transition of alkaline-earth-like atoms has garnered increasing
interest in the context of a future redefinition of the Système International second, as well as …

We have observed high-dispersion echelle spectra of main-sequence stars in five nearby
young associations–Argus, Carina-Near, Hercules-Lyra, Orion and Subgroup B4–and …

A mesoscopic system of a few particles can undergo changes of configuration that resemble
phase transitions but with a nonuniversal behavior. A notable example is orientational …

The present work deals with a set of problems in isotope shifts of neutral barium spectral
lines. Some well-known transitions (6 s 2 1 S 0− 6 s 6 p 1, 3 P 1 o and 6 s 2 1 S 0− 6 p 2 3 P …

Transition frequencies between low-lying energy levels in a single trapped Ba+ 138 ion
have been measured with laser spectroscopy referenced to an optical frequency comb. By …

We report the direct measurement of isotope shifts of the barium 6 s 2 S 0 1–5 d 6 p D 1 o 3
413-nm electric quadrupole transition, which is utilized for efficient barium ion trapping via …