Revised Analysis of Fe vii

Alexander Kramida; Alexander N. Ryabtsev; Peter R. Young

doi:10.3847/1538-4365/ac3a7e

Revised Analysis of Fe vii

Alexander Kramida^*, Alexander N. Ryabtsev, Peter R. Young

^*Corresponding author for this work

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

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Abstract

New spectrograms of multiply ionized iron have been recorded and analyzed, targeting the Fe vii spectrum. As a result, several previously unknown spectral lines and energy levels have been identified in this spectrum. These new data have been analyzed together with all previously published laboratory and astrophysical data on this spectrum. The energy levels have been interpreted using parametric calculations with Cowan codes. Radiative transition rates calculated in this work supplemented other previously published calculations in constructing a complete set of recommended transition probabilities. The ionization energy of Fe vii has been redetermined with a fivefold improvement in accuracy. Its new value is 1,007,928(20) cm−1, corresponding to 124.9671(25) eV.

Original language	English
Article number	37
Pages (from-to)	1-20
Number of pages	20
Journal	Astrophysical Journal, Supplement Series
Volume	258
Issue number	2
Early online date	1 Feb 2022
DOIs	https://doi.org/10.3847/1538-4365/ac3a7e
Publication status	Published - 3 Feb 2022
Externally published	Yes

Keywords

Atomic spectroscopy
Spectroscopy
Line intensities
Solar extreme ultraviolet emission
Solar transition region

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title = "Revised Analysis of Fe vii",

abstract = "New spectrograms of multiply ionized iron have been recorded and analyzed, targeting the Fe vii spectrum. As a result, several previously unknown spectral lines and energy levels have been identified in this spectrum. These new data have been analyzed together with all previously published laboratory and astrophysical data on this spectrum. The energy levels have been interpreted using parametric calculations with Cowan codes. Radiative transition rates calculated in this work supplemented other previously published calculations in constructing a complete set of recommended transition probabilities. The ionization energy of Fe vii has been redetermined with a fivefold improvement in accuracy. Its new value is 1,007,928(20) cm−1, corresponding to 124.9671(25) eV.",

keywords = "Atomic spectroscopy, Spectroscopy, Line intensities, Solar extreme ultraviolet emission, Solar transition region",

author = "Alexander Kramida and Ryabtsev, {Alexander N.} and Young, {Peter R.}",

note = "Funding information: P.R.Y. acknowledges financial support from the NASA Heliophysics Data Environment Enhancements program and the Hinode project.",

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doi = "10.3847/1538-4365/ac3a7e",

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TY - JOUR

T1 - Revised Analysis of Fe vii

AU - Kramida, Alexander

AU - Ryabtsev, Alexander N.

AU - Young, Peter R.

N1 - Funding information: P.R.Y. acknowledges financial support from the NASA Heliophysics Data Environment Enhancements program and the Hinode project.

PY - 2022/2/3

Y1 - 2022/2/3

N2 - New spectrograms of multiply ionized iron have been recorded and analyzed, targeting the Fe vii spectrum. As a result, several previously unknown spectral lines and energy levels have been identified in this spectrum. These new data have been analyzed together with all previously published laboratory and astrophysical data on this spectrum. The energy levels have been interpreted using parametric calculations with Cowan codes. Radiative transition rates calculated in this work supplemented other previously published calculations in constructing a complete set of recommended transition probabilities. The ionization energy of Fe vii has been redetermined with a fivefold improvement in accuracy. Its new value is 1,007,928(20) cm−1, corresponding to 124.9671(25) eV.

AB - New spectrograms of multiply ionized iron have been recorded and analyzed, targeting the Fe vii spectrum. As a result, several previously unknown spectral lines and energy levels have been identified in this spectrum. These new data have been analyzed together with all previously published laboratory and astrophysical data on this spectrum. The energy levels have been interpreted using parametric calculations with Cowan codes. Radiative transition rates calculated in this work supplemented other previously published calculations in constructing a complete set of recommended transition probabilities. The ionization energy of Fe vii has been redetermined with a fivefold improvement in accuracy. Its new value is 1,007,928(20) cm−1, corresponding to 124.9671(25) eV.

KW - Atomic spectroscopy

KW - Spectroscopy

KW - Line intensities

KW - Solar extreme ultraviolet emission

KW - Solar transition region

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DO - 10.3847/1538-4365/ac3a7e

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JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

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ER -

Revised Analysis of Fe vii

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