Alignment of helium excited by thin carbon foils
- 1 November 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 16 (5), 1805-1810
- https://doi.org/10.1103/physreva.16.1805
Abstract
We have measured the linear polarization of the 5016-Å, transition of Hei excited by a thin carbon foil perpendicular to the incident beam at ion energies 50-500 keV. We find that the alignment of the term depends upon the beam current density within the range (2-150 μA ) measured. Oscillations in the dependence of both (the linear polarization fraction) upon energy and the current density variation of with energy are observed. We discuss possible origins of these variations.
Keywords
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