Next Article in Journal
Systematic Observation of EUV Spectra from Highly Charged Lanthanide Ions in the Large Helical Device
Next Article in Special Issue
H-β Line in a Corona Helium Plasma: A Multi-Code Line Shape Comparison
Previous Article in Journal / Special Issue
Matrix Methods for Solving Hartree-Fock Equations in Atomic Structure Calculations and Line Broadening
Article Menu

Export Article

Open AccessFeature PaperArticle
Atoms 2018, 6(2), 23; https://doi.org/10.3390/atoms6020023

Revisiting the Stark Width and Shift of He II Pα

1
Faculty of Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
2
Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
3
Departamento de Óptica, Universidad de Valladolid, 47071 Valladolid, Spain
4
Lawrence Livermore National Laboratories, P.O. Box 808, Livermore, CA 94550, USA
5
Aix Marseille Université, CNRS, PIIM UMR 7345, 13397 Marseille, France
*
Author to whom correspondence should be addressed.
Received: 1 March 2018 / Revised: 28 March 2018 / Accepted: 18 April 2018 / Published: 24 April 2018
(This article belongs to the Special Issue Spectral Line Shapes in Plasmas II)
View Full-Text   |   Download PDF [1554 KB, uploaded 24 April 2018]   |  

Abstract

We report experimental determination of plasma-induced Stark widths and shifts of the He II P α line and a comparison of the results with calculations performed by several computational approaches. The measurements were carried out in a small compressing plasma channel device, reaching electron densities in excess of 10 18 cm 3 and temperatures of a few eV. The experimental data are in a good agreement with some previously published studies. However, the measured relation between the Stark shift and width could not be reproduced by either of the codes, and this disagreement is not yet resolved. This suggests the existence of an additional effect that is not accounted for in the present models and leads to a larger than expected Stark shift of the He II P α line. View Full-Text
Keywords: Stark width and shift; helium Paschen-α; lineshape code comparison; plasma density diagnostics Stark width and shift; helium Paschen-α; lineshape code comparison; plasma density diagnostics
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Stollberg, C.; Stambulchik, E.; Duan, B.; Gigosos, M.A.; González Herrero, D.; Iglesias, C.A.; Mossé, C. Revisiting the Stark Width and Shift of He II Pα. Atoms 2018, 6, 23.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Atoms EISSN 2218-2004 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top