Observation of Resonant Transfer and Excitation to SpecificLS-Coupled States inO5++ He Collisions by High-Resolution, 0° Auger-Electron Spectroscopy

Abstract
Conclusive evidence is presented for resonant transfer and excitation to specific intermediate states in collisions of Li-like O5+ with He. Using the technique of high-resolution 0° Auger-electron spectroscopy, we observed a maximum in the cross section for production of Be-like 1s2s2p2D3 and 1s2s2p2D1 states as a function of incident ion energy. The peak appears at ∼13 MeV with a width of ∼7 MeV and is in good agreement with the impulse-approximation model for resonant transfer and excitation.