Hala, F.
and Nave, G.
(2022),
HYPERFINE STRUCTURE CONSTANTS OF Sc I AND Sc II WITH FOURIER TRANSFORM SPECTROSCOPY, The Astrophysical Journal, [online], https://doi.org/10.3847/1538-4365/ac3edc, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929570
(Accessed November 24, 2025)
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HYPERFINE STRUCTURE CONSTANTS OF Sc I AND Sc II WITH FOURIER TRANSFORM SPECTROSCOPY
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Abstract
We report new experimental hyperfine structure constants of levels in neutral and singly ionized Scandium (Sc I & Sc II). We observed spectra of Sc-Ar and Sc-Ne hollow cathode discharges in the region 185 nm - 3500 nm (54,055 cm-1 - 2857 cm-1) using Fourier transform (FT) spectrometers. The measurements show significant hyperfine structure patterns (HFS) for more than 1000 lines. These were fitted using the computer package XGREMLIN (Nave 2015) to determine the magnetic dipole hyperfine interaction constant A for 156 levels in Sc I and 6 levels in Sc II, of which 79 Sc I levels have no previous measurements. The uncertainty in magnetic dipole constants (A) are between 1x10-4 and 5x10-4 cm-1. A total of 1142 spectral lines are fitted in twelve spectra.Citation
The Astrophysical Journal
Volume
259
Pub Type
Journals
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Keywords
atomic data-line, profile-methods, laboratory: atomic-techniques, spectroscopic
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Created February 28, 2022, Updated September 29, 2025