The energy of the excited noble gas atoms then can ionize the quench gas particles by energy transfer via collisions; known as the Penning effect.
ionization | Low-ionization nuclear emission-line region | Ionization | International Muon Ionization Cooling Experiment | Swedish penning | Penning trap | Penning ionization | Negative air ionization therapy | Mike Penning | Helium ionization detector | Flame ionization detector | Electron ionization | Discharge ionization detector |