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 ...

Helium is the simplest element in the periodic table with more than one particle in its nucleus, yet state of the art theory and experiments on it don't add up.

The charge radius is a statistical measure of how far the electric charge of a particle extends into space. Both groups were ...

Collaboration has obtained a high-precision cosmic-ray boron spectrum in the energy range of 10 GeV/n–8 TeV/n, and discovered ...

But helium is too light to exist on Earth for long. Once it reaches the surface in its gaseous phase -- once it comes out of the rock and makes it into the atmosphere -- it's only a matter of time ...

“Our idea was to find a particle-physics ingredient to recycle the neutrons that already exist,” he says. Particle X would deplete lithium in two ways. It could break up beryllium nuclei into helium-3 ...

Solar particle events, in which particles are accelerated in or from the solar corona, can contain high concentrations of helium-3; but no matter the helium-3 contents, they typically contain high ...

Helium is made up of two protons and two neutrons, and hydrogen is just one proton and no neutrons. So the fewer the neutrons available in the early universe, the less helium would be produced.

Helium also cools particle accelerators, quantum computers, and the infrared detectors on the James Webb Space Telescope. As a gas, helium whisks heat away from silicon to prevent damage in ...

En route to record-breaking X-rays, SLAC’s Cryogenic team built a helium-refrigeration plant that lowers the LCLS-II accelerator to superconducting temperatures.

In a series of high-energy particle collisions, elements like helium are formed in the early universe. Here, D stands for deuterium, an isotope of hydrogen with one proton and one neutron, ...