Coplanar Symmetric and Asymmetric Electron Impact Ionization Studies from the 1b₁ State of H₂O At Low to Intermediate Impact Energies

Abstract

(e, 2e) ionization differential cross sections are presented for incident electron energies ranging from 15 eV to 95 eV above the ionization threshold of the 1b1 molecular state of H2O. Experimental results and theoretical analysis were derived for three energies in a coplanar symmetric geometry, and for three energies in an asymmetric geometry. The experimental data show a wide variation in the cross section over this range of energies, whereas the theoretical analysis carried out using a sophisticated molecular DWBA model, which includes the final state post collision interaction (PCI), shows best agreement at lower energies. The experimental techniques used to collect the data are described here as well as an improved theoretical approach using elastic scattering cross sections to evaluate the accuracy of the distorted waves utilized in the calculation of the ionization cross sections.

Department(s)

Physics

Sponsor(s)

National Science Foundation (U.S.)
Great Britain. Engineering and Physical Sciences Research Council

Keywords and Phrases

Atomic Physics; Molecular Excitation and Ionization; Molecular Physics; Statistical Theories; Stochastic and Trajectory Models; Transition State

International Standard Serial Number (ISSN)

0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Institute of Physics - IOP Publishing, All rights reserved.

Publication Date

01 Jul 2007

Link to Full Text

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