First, the researchers used a short laser pulse about 200 nanometers in wavelength to excite ammonia molecules. This pump ...

Scientists used a synchronized pair of X-ray pulses (shown in pink and green) to study the energetic response of electrons (gold) in liquid water on attosecond time scales, while the hydrogen (white) ...

The international research team found that excited electrons (at the centre of the image) can straighten out the skewed crystal lattice of perovskite nanocrystals. Many a scientific and technical ...

The emission of photons by excited nuclei has been explored for timekeeping and sensing, but nuclear processes that eject electrons offer practical advantages. Electrons in atoms can exist only in ...

A remarkable consequence of quantum mechanics is that electrons can display interference effects. This interference is similar to waves interacting in the ocean or the electromagnetic waves that carry ...

An excited electron also leaves a hole in the underlying valence band -- a mobile vacancy that can be moved through the material like a positive charge carrier. It is mainly defects in the crystal ...

Schematic illustrations of a persistent luminescence mechanism under (a) band-to-band or (b) below-gap excitation: 1, excitation—electrons are excited and holes generated under illumination; 2, ...

Researchers have shown, for the first time with very high time and spatial resolution, that electrons in certain ...