Natural SciencesPhysicsAtomic PhysicsPlasma PhysicsQuantum MechanicsAtomic Energy LevelsAtomic ExcitationAtomic IonizationElectron Beam PhysicsHydrogen AtomMolecular Energy LevelsElectron Excitation ProcessesElectron Impact CollisionsElectron Impact IonizationElectron-impact ExcitationExcitationExcitation ThresholdsIonization Thresholds
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Two-Electron Excitation States in Helium.
R. P. Madden, K. Codling · The Astrophysical Journal · 1965 · 471 citations
Electron Transmission Spectroscopy: Rare Gases
Léon Sanche, G. J. Schulz · Physical review. A, General physics · 1972 · 401 citations