scintillation

/ˌsin-tə-ˈlā-shən/

noun

  1. an act or instance of scintillating; especially : rapid changes in the brightness of a celestial body

  2. a spark or flash emitted in scintillating

  3. a flash of light produced in a phosphor by an ionizing event

noun

  1. a device for detecting and registering individual scintillations (as in radioactive emission)