Auger electrons are electrons emitted from an atom as a result of an energy release due to an inner-shell electron vacancy. This process, known as the Auger effect, occurs when an electron from a higher energy level fills the vacancy, releasing energy that can eject another electron from the same atom. The emitted electron is called an Auger electron. This phenomenon is named after the French physicist Pierre Auger, who discovered it in the 1920s.
