Laser physicists have captured an atomic-level event – an electron being ejected from a helium atom after being struck by a photon – with an accuracy of a trillionth of a billionth of a second ...

Electronic pas de deux: Physicists in Heidelberg have filmed the pulsing motion of the electron pair in a helium atom. At 15.3 femtoseconds (fs) the two electrons are close to the nucleus (centre of ...

In very intense radiation fields, however, the atom may simultaneously absorb multiple photons, and these can give rise to multiple emission pathways. Jiang and colleagues have done a theoretical ...

For the first time, and contrary to popular belief, scientists measured the vibrational structure of hydrogen and helium atoms by X-rays. The results disprove the misconception that it’s ...

Understanding the ionization of proton-impacted helium Date: August 6, 2021 Source: Springer Summary: In a new study published in EPJ D, researchers have clearly identified particular areas where ...

An electron makes its escape It's like catching light in action. For the first time, physicists have measured changes in an atom to the level of zeptoseconds, or trillionths of a billionth of a ...

The remaining electron then behaves as if it were orbiting a nucleus with just one positive charge, just like the electron in a hydrogen atom. The difference is that the nucleus is 4.1 times ...

Researchers have now created a new type of artificial atom in which a helium nucleus is orbited not by an electron but by a pion. Helium is not just for party balloons.

An international team of researchers has established that the radius of the helium nucleus is 1.67824 femtometers – or 1.67824×10-15 meters (5.506×10-15 feet). To give you a comparison, if the ...