When an inner electron is removed from an atom in a photoelectric interaction,thus causing an inner-shell vacancy,the energy liberated when this vacancy is filled can be transferred to another electron of the atom,thereby ejecting that electron,instead of emerging from the atom as characteristic radiation.What is this electron called?

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The electron ejected from an atom due to the energy liberated when an inner-shell vacancy is filled is called an Auger electron. This process is known as the Auger effect or Auger transition. It is named after Pierre Auger, who first observed this phenomenon in 1925. Auger electrons have characteristic energies that depend on the element from which they are emitted and can be used in various analytical techniques, including Auger spectroscopy and Auger electron microscopy.

When an Inner Electron Is Removed from an Atom in a Photoelectric