R-matrix electron-impact excitation data for astrophysically abundant sulphur ions

G. Y. Liang; N. R. Badnell; G. Zhao; J. Y. Zhong; F. L. Wang

doi:10.1051/0004-6361/201117616

R-matrix electron-impact excitation data for astrophysically abundant sulphur ions

G. Y. Liang, N. R. Badnell, G. Zhao, J. Y. Zhong, F. L. Wang

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We present results for the electron-impact excitation of highly-charged sulphur ions (S8+–S11+) obtained using the intermediate-coupling frame transformation R-matrix approach. A detailed comparison of the target structure has been made for the four ions to assess the uncertainty on collision strengths from the target structure. Effective collision strengths (Υs) are presented at temperatures ranging from 2 × 102(z + 1)2 K to 2 × 106(z + 1)2 K (where z is the residual charge of ions). Detailed comparisons for the Υs are made with the results of previous calculations for these ions, which will pose insight on the uncertainty in their usage by astrophysical and fusion modelling codes.

Original language	English
Article number	A87
Number of pages	13
Journal	Astronomy and Astrophysics
Volume	533
DOIs	https://doi.org/10.1051/0004-6361/201117616
Publication status	Published - Sept 2011

Keywords

Boron like ions
spectral line intensities
plasmas
rate coefficients
iron project
S-XII
solar active region
transitions
emission-lines
effective collision strengths
atomic processes
atomic data

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10.1051/0004-6361/201117616

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title = "R-matrix electron-impact excitation data for astrophysically abundant sulphur ions",

abstract = "We present results for the electron-impact excitation of highly-charged sulphur ions (S8+–S11+) obtained using the intermediate-coupling frame transformation R-matrix approach. A detailed comparison of the target structure has been made for the four ions to assess the uncertainty on collision strengths from the target structure. Effective collision strengths (Υs) are presented at temperatures ranging from 2 × 102(z + 1)2 K to 2 × 106(z + 1)2 K (where z is the residual charge of ions). Detailed comparisons for the Υs are made with the results of previous calculations for these ions, which will pose insight on the uncertainty in their usage by astrophysical and fusion modelling codes.",

keywords = "Boron like ions, spectral line intensities, plasmas, rate coefficients, iron project, S-XII, solar active region, transitions, emission-lines, effective collision strengths, atomic processes, atomic data",

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journal = "Astronomy and Astrophysics",

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T1 - R-matrix electron-impact excitation data for astrophysically abundant sulphur ions

AU - Liang, G. Y.

AU - Badnell, N. R.

AU - Zhao, G.

AU - Zhong, J. Y.

AU - Wang, F. L.

PY - 2011/9

Y1 - 2011/9

N2 - We present results for the electron-impact excitation of highly-charged sulphur ions (S8+–S11+) obtained using the intermediate-coupling frame transformation R-matrix approach. A detailed comparison of the target structure has been made for the four ions to assess the uncertainty on collision strengths from the target structure. Effective collision strengths (Υs) are presented at temperatures ranging from 2 × 102(z + 1)2 K to 2 × 106(z + 1)2 K (where z is the residual charge of ions). Detailed comparisons for the Υs are made with the results of previous calculations for these ions, which will pose insight on the uncertainty in their usage by astrophysical and fusion modelling codes.

AB - We present results for the electron-impact excitation of highly-charged sulphur ions (S8+–S11+) obtained using the intermediate-coupling frame transformation R-matrix approach. A detailed comparison of the target structure has been made for the four ions to assess the uncertainty on collision strengths from the target structure. Effective collision strengths (Υs) are presented at temperatures ranging from 2 × 102(z + 1)2 K to 2 × 106(z + 1)2 K (where z is the residual charge of ions). Detailed comparisons for the Υs are made with the results of previous calculations for these ions, which will pose insight on the uncertainty in their usage by astrophysical and fusion modelling codes.

KW - Boron like ions

KW - spectral line intensities

KW - plasmas

KW - rate coefficients

KW - iron project

KW - S-XII

KW - solar active region

KW - transitions

KW - emission-lines

KW - effective collision strengths

KW - atomic processes

KW - atomic data

UR - http://www.scopus.com/inward/record.url?scp=80052542037&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201117616

DO - 10.1051/0004-6361/201117616

M3 - Article

SN - 0004-6361

VL - 533

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A87

ER -

R-matrix electron-impact excitation data for astrophysically abundant sulphur ions

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R-matrix electron-impact excitation data for astrophysically abundant sulphur ions

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