PRODUCTION OF DOUBLY CORE EXCITED CONFIGURATIONS IN C4+PROJECTILES THROUGH RESONANT TRANSFER EXCITATION

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Abstract
Projectile K-Auger electron production cross sections have been measured for C4+ ions in 3 to 8 MeV collisions with atomic He, Ne, and molecular Hydrogen targets at lab observation angles of 9.6° to 10.6°. The K-Auger electron spectra predominantly result from decays of Li-like excited states and are interpreted as single electron capture to the metastable ls2s 3S component of the incident beam. High resolution K-LL Auger spectra show that capture into 2s is suppressed by the presence of the 2s spectator electron. The formation of single and double core excited Li-like 2D configurations are interpreted in part as resonant transfer and excitation with the ground state and metastable components respectively. Also, the data shows a much stronger production of the 2s22p 2P configuration through NTE for Ne than for the He target

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