Observation of Trielectronic Recombination in Be-like Cl Ions

Details Observation of Trielectronic Recombination in Be-like Cl Ions Observation of Trielectronic Recombination in Be-like Cl Ions

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phrvl..91d3001s&link_type=abstract

Physical Review Letters, vol. 91, Issue 4, id. 043001

Physics

23

Absolute And Relative Intensities, Autoionization, Electron-Ion Recombination And Electron Attachment

Scientific paper

Recombination involving the core excitation of two electrons, which may be termed trielectronic recombination, has been experimentally identified for the first time. Using Cl13+ ions circulating in the TSR heavy-ion storage ring, we have observed surprisingly strong low-energy trielectronic recombination resonances, comparable to the dielectronic process. At higher electron-ion collision energies, trielectronic recombination is suppressed due to the autoionization of the triply excited intermediate state into excited final states. The formation of the intermediate state depends sensitively on configuration mixing, making trielectronic recombination a challenge to atomic-structure calculations.

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