Study of Electron Capture Collisions of O6++He by Visible Spectroscopy

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Single and double electron capture processes by O 6+ from He at 90 keV have been investigated by observation of the emission spectrum in the wavelength region of 290–510 nm. In addition to transitions from excited states of O 5+ populated by single electron capture processes, Yrast transitions from Rydberg states (1s 2 2s n l ) of O 4+ populated by double electron capture have been observed. Transfer target excitation processes have been confirmed by the observation of transitions from excited states of He + .