0598615 - ÚFCH JH 2025 RIV US eng J - Journal Article
Civiš, Svatopluk - Kramida, A. - Zanozina, Ekaterina M. - Kubišta, Jiří - Kubelík, Petr - Ferus, Martin - Chernov, V. E.
Updated System of S i Levels Using Fourier Transform Infrared Spectroscopy in the Range from 800 to 11,000 cm−1.
Astrophysical Journal Supplement Series. Roč. 274, č. 2 (2024), č. článku 32. ISSN 0067-0049. E-ISSN 1538-4365
R&D Projects: GA ČR(CZ) GC20-10591J; GA MŠMT EH22_008/0004558
Institutional support: RVO:61388955
Keywords : Fourier transform spectroscopy techniques * FTIR laboratory measurement * Oscillator-strengths
OECD category: Physical chemistry
Impact factor: 8.6, year: 2023 ; AIS: 4.001, rok: 2023
Method of publishing: Open access
Result website:
https://iopscience.iop.org/article/10.3847/1538-4365/ad6904DOI: https://doi.org/10.3847/1538-4365/ad6904

In this study we report on high-precision laboratory measurements of transition wavenumbers for 172 atomic sulfur lines in the infrared region 800–11,000 cm−1 using Fourier transform spectroscopy techniques. Our analysis includes 96 lines that have not been previously measured in the laboratory. We also correct several sulfur energy-level measurements reported in earlier studies. These refined measurements are important for a range of scientific disciplines, such as astrophysics, atmospheric chemistry, and combustion plasma physics. We have used the combined list of all observed lines to derive a refined set of sulfur energy levels. For about half of all nonautoionizing levels, the uncertainties have been reduced by a factor between 2 and 23. From the newly measured nonpenetrating (high-l) Rydberg levels we have also obtained the first ionization energy of the S atom, IE = 83,559.170(11) cm−1, which is more accurate than the currently recommended value by 2 orders of magnitude. Our analysis has led to a significantly more accurate result than the earlier set of Ritz wavelengths with observed intensities reduced to a common uniform scale and an extended list of recommended transition probabilities.

Permanent Link: https://hdl.handle.net/11104/0356225