The article explores the forms of spectroscopy which engage actions other than measuring a property of light. It notes that Austrian physicist Lise Meitner has accounted emission of electrons from atoms that were cast with other electrons. French physicist Pierre Auger has the same effect and attributed it to an excited-state atom that has given off energy through releasing an upper-quantum state electron. Moreover, it reveals a schematic of the steps involved in the Auger effect.
Ball, David W., "Auger Spectroscopy" (2009). Chemistry Faculty Publications. 144.