Nuclear physics

US scientists evaluate their options after failing to replicate record-setting experiment from 2021.

A new transmission route for gastrointestinal viruses, and an exotic kind of matter made from just neutrons.

Russia’s invasion of Ukraine has highlighted the need to improve energy security.

An experiment firing helium-8 nuclei at a proton target has generated evidence that four neutrons can exist transiently without any other matter. But doubts remain, because the existence of such systems is at odds with theory.

Director-general of ITER, the world’s largest fusion experiment.

A high-precision comparison of the magnetic moments of two isotopically different neon ions opens a path to the search for elusive particles that could explain the unexpectedly low observed mass of the Higgs boson.