auger effect

auger effect
\(ˈ)ō|zhā-\ noun
Usage: usually capitalized A
Etymology: after Pierre V. Auger b1899 French physicist
: a process in which an atom singly ionized by emitting one electron with energy in the X-ray range instead of emitting the usual X-ray photon on recovery undergoes a transition in which a second electron is emitted

Useful english dictionary. 2012.