Search for Interference Effects in Electron Impact Ionization of Aligned Hydrogen Molecules

Abstract

Five-fold differential cross sections (5DCS) for electron impact ionization of a diatomic molecule have been explored experimentally as a function of molecular alignment. Using H2 as a test system, we exploited dissociative ionization by 200eV electrons to obtain the alignment of the internuclear axis. Separation of ground-state ionization from autoionization is discussed. 5DCS are investigated for the direct channel and found to be in good agreement with M3DW calculations discarding at the same time a simple two-centre interference model discussed recently in the literature.

Department(s)

Physics

Sponsor(s)

DFG Center for Functional Nanostructures Karlsruhe
National Science Foundation (U.S.)
Saudi Ministry of Higher Education's King Abdullah Bin Abdul-Aziz Scholarship

Keywords and Phrases

Autoionization; Differential Cross Section; Direct Channel; Dissociative Ionization; Distributed Parameter Networks; Hydrogen Molecule; Internuclear Axis; Molecular Alignment; Particle Detectors; Diatomic molecules; Electron impact ionization; Photodissociation

International Standard Serial Number (ISSN)

0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 Institute of Physics - IOP Publishing, All rights reserved.

Publication Date

01 Apr 2010

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