Alignment and Orientation in He 2¹P and 3¹P Excitation by Electron Impact

Author

Johannes P. M. Beijers
Don H. Madison, Missouri University of Science and TechnologyFollow
J. J J Van Eck
H. G M M Heideman

Abstract

The authors have studied the orientation and alignment of the 2¹P and 3¹P states of helium caused by electron impact at incident energies between 50 and 80 eV both experimentally and theoretically as a function of the electron scattering angle. The angular correlations between inelastically scattered electrons and VUV de-excitation photons were measured, particularly in the region where the orientation changes sign. The experimental results were compared with several distorted-wave models. The best of these models gave reasonably good agreement with the experimental data for excitation of the 2¹P and 3¹P states for scattering angles of less than 60 degrees and qualitative agreement for larger angles.

Recommended Citation

J. P. Beijers et al., "Alignment and Orientation in He 2¹P and 3¹P Excitation by Electron Impact," Journal of Physics B: Atomic and Molecular Physics, vol. 20, no. 1, pp. 167 - 181, Institute of Physics (IOP), Jan 1987.

The definitive version is available at https://doi.org/10.1088/0022-3700/20/1/019

Department(s)

Physics

International Standard Serial Number (ISSN)

0022-3700

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1987 Institute of Physics (IOP), All rights reserved.

Publication Date

01 Jan 1987