Frequency Metrology in Quantum Degenerate Helium: Direct Measurement of the 2 3S1 -> 2 1S0 Transition

Theoretical energies of low-lying states of light helium-like ions

(2010) Vladimir A. Yerokhin et al.   PHYSICAL REVIEW A

Extreme Ultraviolet Frequency Comb Metrology

(2010) Dominik Z. Kandula et al.   PHYSICAL REVIEW LETTERS

Fine Structure of Heliumlike Ions and Determination of the Fine Structure Constant

(2010) Krzysztof Pachucki et al.   PHYSICAL REVIEW LETTERS

Determination of the Fine Structure Constant Using Helium Fine Structure

(2010) Marc Smiciklas et al.   PHYSICAL REVIEW LETTERS

High-precision spectroscopy as a test of quantum electrodynamics in light atomic systems

(2008) G WF Drake et al.   CANADIAN JOURNAL OF PHYSICS

A high-precision variational approach to three- and four-nucleon bound and zero-energy scattering states

(2008) A Kievsky et al.   JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS

Precise root-mean-square radius ofHe4

(2008) Ingo Sick   PHYSICAL REVIEW C