Precision Measurements of Radioactive Molecules for Fundamental Physics

For the first time, nuclear physicists made precision measurements of the short-lived radioactive molecule, radium monofluoride (RaF). The researchers combined ion-trapping and specialized laser systems to measure the fine details of the quantum structure of RaF. This allowed them to study the rotational energy levels of RaF and determine its laser-cooling scheme.

Stable Nickel-64 Nuclei Take Three Distinct Shapes

Scientists have identified three distinct shapes in stable nickel-64 that appear as energy is added to the nucleus. The nucleus in the lowest-energy state is spherical, then takes elongated (prolate) and flattened (oblate) shapes as the protons and neutrons surrounding the nucleus gain energy. This demonstrates profound changes in the way protons and neutrons can arrange themselves.