Lifetime of C2Cl4(-) ions produced by nondissociative electron attachment to C2Cl4.
The lifetimes of long-lived C2Cl4(-) ions formed by Rydberg electron transfer in K(np)/C2Cl4 collisions are investigated using a Penning ion trap. Measurements at high n, n > or = 30, show that low-energy electron attachment to C2Cl4 leads to the production of C2Cl4(-) ions with a broad range of lifetimes that extends up to at least 1 ms. This is attributed to capture by molecules in different initial vibrational states. At low n, internal-to-translational energy transfer in postattachment interactions between the product K+ and C2Cl4(-) ions becomes important and leads to a substantial increase in ion lifetimes.
Liu
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Department of Physics and Astronomy and the Rice Quantum Institute, MS 61 Rice University, Houston, Texas 77005, USA.
Suess
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Dunning
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