Rydberg electron transfer to SF6: product ion lifetimes.
The lifetimes of SF6- ions produced by Rydberg electron transfer in K(np)SF6 collisions at high n, n greater or similar to 30, are examined using a Penning ion trap. The data point to the formation of ions with a range of lifetimes that extends from approximately 1 to greater or similar to 10 ms. Sizable numbers of ions remain in the trap even 40 ms after initial injection and at least part of this signal can be attributed to radiative stabilization. Measurements of free low-energy electron attachment to SF6 in the trap show that the product ions have lifetimes similar to those of SF6- ions formed by electron transfer in high-n collisions.
Department of Physics and Astronomy and the Rice Quantum Institute, MS 61 Rice University, 6100 Main Street, Houston, Texas 77005-1892, USA.
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Liu
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Suess
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Dunning