1.97007 femtometer (quadrillionths of a meter): That's how unimaginably tiny the radius of the atomic nucleus of helium-3 is. This is the result of an experiment at PSI that has now been published ...

Elizabeth Rayne is a creature who writes. Her work has appeared in Popular Mechanics, Ars Technica, SYFY WIRE, Space.com, Live Science, Den of Geek, Forbidden Futures and Collective Tales. She ...

ALICE scientists at the LHC have detected evidence of antihyperhelium-4, marking the first observation of this antimatter hypernucleus. It is also the heaviest antimatter hypernucleus discovered at ...

Collisions between heavy ions at the Large Hadron Collider (LHC) create quark–gluon plasma, a hot and dense state of matter that is thought to have filled the universe around one millionth of a ...

Tauonium: The Smallest and Heaviest Atom with Pure Electromagnetic Interaction. Credit: ©Science China Press Recent discoveries in quantum physics have revealed simpler atomic structures than hydrogen ...

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MathPlayer has a long list of units it accepts. I want to record them, so here they are (mostly in the order they occur). First come the abbreviations followed by the word used for the singular case.

The team’s measurement of the proton’s radius was 0.73 femtometer, even smaller than the 0.84-femtometer electric charge radius. In either case, it is almost 10,000 times smaller than a ...

Ultra-peripheral heavy-ion collisions (UPCs) occur when the impact parameter of the collision is greater than the sum of the radii of the colliding nuclei. UPCs allow one to study photon-induced ...

Protons are tiny particles just a femtometer across, but without them, atoms wouldn't exist. Protons are tiny subatomic particles that, along with neutrons, form the nucleus of an atom. The ...