Alignment of helium excited by thin carbon foils

Authors

• R. D. Hight, University of Toledo, Toledo, Ohio
• R. M. Schectman, University of Toledo, Toledo, Ohio
• H. G. Berry, University of Chicago, Chicago, Illinois
• G. Gabrielse, University of Chicago, Chicago, Illinois
• Timothy J. Gay, University of Nebraska - LincolnFollow

Document Type

Article

Date of this Version

November 1977

Comments

Published in Phys. Rev. A 16, 1805 - 1810 (1977) [Issue 5 – November 1977]. ©1977 The American Physical Society. Used by permission.

Abstract

We have measured the linear polarization of the 5016-Å, 2s 1S-3p 1P transition of Hei excited by a thin carbon foil perpendicular to the incident He+ beam at ion energies 50-500 keV. We find that the alignment of the 3p 1P term depends upon the beam current density within the range (2- 150 μA cm-2) measured. Oscillations in the dependence of both M / I (the linear polarization fraction) upon energy and the current density variation of M / I with energy are observed. We discuss possible origins of these variations.