Observation of p-Wave Threshold Behavior in Electron Attachment to F₂ Molecules

Authors

M. Braun, Fachbereich Physik, Technische Universita¨t, D-67653 Kaiserslautern, Germany
M.-W. Ruf, Fachbereich Physik, Technische Universita¨t, D-67653 Kaiserslautern, Germany
Ilya I. Fabrikant, University of Nebraska-LincolnFollow
H. Hotop, Fachbereich Physik, Technische Universita¨t, D-67653 Kaiserslautern, GermanyFollow

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 (X¹Σ_g⁺) 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 Σ_u⁺) p-wave shape resonance in contrast with previous experimental claims for s-wave threshold behavior.