Question

What function is used in the low-loss region of the EELS spectrum (less then 100eV in Transmission electron microscopy) ?

Answer 1

EELS is known as Electron energy-loss spectroscopy which is mainly used to know the structural and chemical information about a solid. This method is used in modern electron microscope.

In this process a solid material is exposed to a beam of moving electrons having narrow range of kinetic energies. Some of the electrons would undergo inelastic collision, which means that electrons would lose energy and have their paths randomly deflected. The amount of energy loss can be measured via an electron spectrometer and interpreted in terms of what caused the energy loss. Inelastic interactions include phonon excitations, inter-band, intra-band transitions, plasmon excitations and inner shell ionizations. The inner-shell ionizations are useful for detecting the elemental components of a material.