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Title: Revisiting the Stark Width and Shift of He II Pα

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. Furthermore 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.

Authors:
 [1];  [1];  [2];  [3];  [3];  [4];  [5]
  1. Weizmann Institute of Science, Rehovot (Israel)
  2. Institute of Applied Physics and Computational Mathematics, Beijing (China)
  3. Univ. de Valladolid, Valladolid (Spain)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Aix Marseille Univ., Marseille (France)
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1499678
Grant/Contract Number:  
NA0003764
Resource Type:
Accepted Manuscript
Journal Name:
Atoms
Additional Journal Information:
Journal Volume: 6; Journal Issue: 2; Journal ID: ISSN 2218-2004
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Stark width and shift; helium Paschen-α; lineshape code comparison; plasma density diagnostics

Citation Formats

Stollberg, Christine, Stambulchik, Evgeny, Duan, Bin, Gigosos, Marco, Herrero, Diego González, Iglesias, Carlos A., and Mossé, Caroline. Revisiting the Stark Width and Shift of He II Pα. United States: N. p., 2018. Web. doi:10.3390/atoms6020023.
Stollberg, Christine, Stambulchik, Evgeny, Duan, Bin, Gigosos, Marco, Herrero, Diego González, Iglesias, Carlos A., & Mossé, Caroline. Revisiting the Stark Width and Shift of He II Pα. United States. doi:10.3390/atoms6020023.
Stollberg, Christine, Stambulchik, Evgeny, Duan, Bin, Gigosos, Marco, Herrero, Diego González, Iglesias, Carlos A., and Mossé, Caroline. Tue . "Revisiting the Stark Width and Shift of He II Pα". United States. doi:10.3390/atoms6020023. https://www.osti.gov/servlets/purl/1499678.
@article{osti_1499678,
title = {Revisiting the Stark Width and Shift of He II Pα},
author = {Stollberg, Christine and Stambulchik, Evgeny and Duan, Bin and Gigosos, Marco and Herrero, Diego González and Iglesias, Carlos A. and Mossé, Caroline},
abstractNote = {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 1018 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. Furthermore 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.},
doi = {10.3390/atoms6020023},
journal = {Atoms},
number = 2,
volume = 6,
place = {United States},
year = {2018},
month = {4}
}

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