HYPERFINE STRUCTURE CONSTANTS OF Sc I AND Sc II WITH FOURIER TRANSFORM SPECTROSCOPY

Published

February 28, 2022

Author(s)

FNU Hala, Gillian Nave

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

Download Paper

https://doi.org/10.3847/1538-4365/ac3edc

Local Download

Keywords

atomic data-line, profile-methods, laboratory: atomic-techniques, spectroscopic

Citation

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 October 10, 2025)