Auger effect
noun
Au·ger effect (ˌ)ō-ˈzhā- 
: a process in which an atom that has been ionized through the emission of an electron with energy in the X-ray range undergoes a transition in which a second electron is emitted rather than an X-ray photon
called also Auger process
Word History
Etymology
Pierre V. Auger †1993 French physicist
First Known Use
1928, in the meaning defined above