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Fivefold differential cross sections for ground-state ionization of aligned H2 by electron impact

MPG-Autoren
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Senftleben,  A.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Pflüger,  T.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ren,  X.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Dorn,  A.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ullrich,  J.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Senftleben, A., Al-Hagan, O., Pflüger, T., Ren, X., Madison, D., Dorn, A., et al. (2010). Fivefold differential cross sections for ground-state ionization of aligned H2 by electron impact. The Journal of Chemical Physics, 133(4): 044302, pp. 1-7. doi:10.1063/1.3457155.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0011-70B5-5
Zusammenfassung
We discuss the ionization of aligned hydrogen molecules into their ionic ground state by 200 eV electrons. Using a reaction microscope, the complete electron scattering kinematics is imaged over a large solid angle. Simultaneously, the molecular alignment is derived from postcollision dissociation of the residual ion. It is found that the ionization cross section is maximized for small angles between the internuclear axis and the momentum transfer. Fivefold differential cross sections (5DCSs) reveal subtle differences in the scattering process for the distinct alignments. We compare our observations with theoretical 5DCSs obtained with an adapted molecular three-body distorted wave model that reproduces most of the results, although discrepancies remain.