An atom consists of a heavy center, called the nucleus, made of particles called protons and neutrons. An atom has lighter particles called electrons that you can think of as orbiting around the ...

Almost everything on Earth is made up of atoms, but where do these fundamental building blocks come from?

Almost everything on Earth is made up of atoms, but where do these fundamental building blocks come from?

Despite containing the overwhelming majority of an atom's mass, the nucleus itself has very little impact on the atom's properties at first glance.

Different isotopes are distinguished by the number of neutrons in the nucleus: helium-3 contains one neutron alongside the two protons, while the heavier helium-4 contains two neutrons.

"Our experiments with muonic helium-3 provide the most accurate value to date for the charge radius of this nucleus," says Randolf Pohl, who is also a member of the PRISMA + Cluster of Excellence ...

An important part of physics research is examining why theoretical calculations and experimental results sometimes don't match. A recent experiment in Germany studied the helium-4 nucleus, also ...

Postulates of Bohr’s Model of an Atom are: The electron in the hydrogen atom can move around the nucleus in a circular path of fixed radius and energy.

A recent experimental measurement has identified a significant discrepancy between theoretical predictions and the observed behavior of the helium-4 nucleus. The work of an international collaboration ...