Abstract
K-LL Auger electron emission from C3+ ions induced by electron capture collisions of C4+ and C5+ ions on Xe, H2 and He atoms at energies of 25 and 100 keV was measured at an observation angle of 0 degrees . The peak of promptly decaying (1s2s2) 2S states directly produced in C5+-He collisions exhibited a pronounced low-energy tail, which was attributed to post-collision interactions (PCI) with He2+ ions recoiling at defined relative velocities. From the peak shape a lifetime of T=1.2+or-0.2*10-14s was determined for the (1s2s2) 2S state, which is in agreement with recent calculations which give values for T of 1.337*10-14s.
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More From: Journal of Physics B: Atomic and Molecular Physics
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