Research Papers in Physics and Astronomy

 

Date of this Version

12-21-2007

Comments

Published in PRL 99, 253202 (2007). Copyright © 2007 The American Physical Society. Used by permission.

Abstract

Using the high resolution laser photoelectron attachment method, we demonstrate that the cross section for F- formation due to electron capture by F2 (X1Σg+) molecules at very low energies exhibits p-wave threshold behavior. This finding confirms the theoretical expectation that low-energy attachment to F2 proceeds through the F2-(2 Σu+) p-wave shape resonance in contrast with previous experimental claims for s-wave threshold behavior.

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