An international team of scientists led by Dr. Lukas Bruder, junior research group leader at the Institute of Physics, ...

Helium can be found in certain parts of the world, notably in Texas, as a minor component in some sources of natural gas. The interesting thing is how this gas gets into the ground in the first place.

An international research team has controlled hybrid electron-photon quantum states in helium atoms. Control of these special quantum states was enabled by the pulse formation of very intense, extreme ...

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 ...

The atom is neutral as it has two positive protons and two negative electrons. A helium atom that has lost or gained an electron is an ion. The ion has two positive protons but one electron so it ...

E. Rutherford has briefly restated the arguments for considering that radio-active phenomena are probably associated with atomic degradation, and that, as a rule, the loss of an atom of helium ...

A MOST significant feature of the success of the quantum theory in explaining the sequence of radiation-frequencies forming the Balmer type of series in the spectra of hydrogen and ionised helium ...

An international group of researchers from the University of Freiburg's Institute of Physics has created and directly ...

For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass, it seemed that something besides the protons in the nucleus ...

It is not the same as a helium atom as it does not contain any electrons but it is written with the same chemical nomenclature as a helium atom: \(_{2}^{4}\textrm{He}\) When a radioactive atom ...

This reaction generates a helium atom and a neutron, which carries most of the energy from the reaction. (Credit: Sophie ...