The simplicity of a hydrogen atom makes it an ideal model for studying atomic structure and interactions. Yet, despite the ...

There has been considerable debate among physicists over the last 15 years about conflicting measurements of the charge ...

A research team has achieved a significant breakthrough in determining fundamental properties of atomic nuclei. The team conducted laser spectroscopy experiments on muonic helium-3. Muonic helium-3 is ...

This allows the nuclear radius to be determined with high precision. With the measurement of helium-3, the experiments on light muonic atoms have now been completed for the time being. The researchers ...

In experiments at the Paul Scherrer Institute PSI, an international research collaboration has measured the radius of the atomic nucleus of helium five times more precisely than ever before. With the ...

Puzzling protons: Alexey Grinin and Dery Taray working on the vacuum system of the 1S-3S experiment at the Max Planck Institute for Quantum Optics. (Courtesy: MPQ) A new and extremely precise ...

Measuring up: an electron scattering experiment yields a small proton radius. (Courtesy: Jefferson Lab) For nearly a decade the size of the particle that makes up the bulk of the universe’s visible ...

A central focus of our research program are several precision experiments that use parity-violating electron scattering to probe the structure of nucleons (the proton and the neutron).