Abstract
We investigated l- and m-distributions of He u (n = 4) states formed during 213.3 keV amu'1 He2+ + Na(3s) collisions by measuring profiles and the linear polarization of the He u (4→ 3) emission. We found that at these energies capture into He+(4f) dominates over capture into other He+(4i) states. Over the indicated energy range the polarization of the4He u (4 → 3) photon emission increases from 0.2 to 0.3 indicating a strong alignment of the captured projectile charge cloud along the intemuclear axis. Due to the non-zero nuclear spin the polarization is up to 10% lower when using3He2+ projectiles instead of4He2+. Classical trajectory Monte Carlo calculations agree quantitatively with these experimental findings and predict a decrease of the polarization towards zero at higher energies due to enhanced capture into He+(4s). A positive polarization is also found for the Na i (3p -v 3s) target de-excitation. However, due to strong depolarization effects caused by the nuclear spin of the23Na nucleus it stays below 0.14. © 1995 IOP Publishing Ltd.
Recommended Citation
S. Schippers et al., "Polarized Light Emission in Kev He²⁺ + Na(3s) Collisions," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 28, no. 15, pp. 3221 - 3228, IOP Publishing, Aug 1995.
The definitive version is available at https://doi.org/10.1088/0953-4075/28/15/017
Department(s)
Physics
International Standard Serial Number (ISSN)
1361-6455; 0953-4075
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 IOP Publishing, All rights reserved.
Publication Date
14 Aug 1995
