Hollow atoms are special atoms with multiple missing electrons in their inner shells, while their outer shells are still ...

The physics of the innermost shells of atoms is qualitatively different in several respect from that of outer electrons. For single deep holes, correlation effects are slight, while the effects of ...

Scientists have generated the shortest pulses of high-energy X-rays to date by using a powerful laser to stimulate inner shell electrons - the electrons closest to an atomic nucleus. These extremely ...

The reported fluorescence from inner shells of double-walled carbon nanotubes (DWCNTs) is an intriguing and potentially useful property. A combination of bulk and single-molecule methods was used to ...

Understanding inner-shell X-ray lasing The inner-shell X-ray lasing process works much like optical lasing, but at much shorter wavelengths. It begins with a pulse of X-ray photons that excites the ...

Continuous polypyrrole (PPy) shells were coated on silicon carbide (SiC) nanowires to form core–shell nanostructures, and the thicknesses of the shells were efficiently tuned through controlling the ...

Powerful X-ray pulses excite atoms’ tightly held inner-shell electrons that emit X-ray photons while returning to their original state.

Because inner-shell electrons are held very tightly, powerful X-ray pulses, like those from X-ray free-electron lasers (XFEL), are required to excite enough of them simultaneously to result in lasing.