A recent experiment in Germany studied the helium-4 nucleus, also known as an alpha particle. Helium-4 consists of only two protons and two neutrons, making it relatively easy to describe using ...

An unstable nucleus can emit a ‘package’ of two protons and two neutrons, called an alpha particle, to become more stable.. Alpha radiation is made up of a stream of alpha particles emitted ...

But because an alpha particle is identical to the nucleus of a helium-4 atom, it is sometimes represented as He2+, that is, a doubly ionized helium-4 atom. Rutherford's gold foil experiment explained.

A particle accelerator experiment at the Brookhaven National Laboratory on Long Island, N.Y., has found antihelium-4, the heaviest antimatter that physicists have ever observed.

Physicists detect nuclear decay in the recoil of a levitating sphere. In the work that won the Physics World award last year, the team used samples of radon-220, which decays first into polonium-216 ...

Demonstration of alpha particle confinement capability in helical fusion plasmas. National Institutes of Natural Sciences. Journal Nuclear Fusion DOI ...