Abstract

Projectile L X-rays are observed for 18–260 keV Ar q+ ions ( q =7 − 14) bombarding Be and Al targets. X-ray yields are found to increase with the L-shell hole number for q ≥ 9. The X-rays are shown to be emitted stepwise, which allows to disintegrate the spectra into the individual steps. It is found that 3s-2p transition is dominant in each step. Transitions from higher angular momentum states like 3d-2p and those from higher principal quantum numbers are relatively weak.

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