One of the most detailed spectrographs ever recorded of the Sun has revealed hundreds of missing wavelengths—gaps in the ...

SPECTROSCOPIC investigations on the scattering of light in crystals show very plainly that their vibration spectra have a discrete structure manifesting itself as a set of lines with sharply defined ...

XES is an element-specific method primarily used to analyze the partially occupied electronic structure of materials. The technique is one of the photon-in-photon-out spectroscopies in which an ...