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Branching Fractions and Transition Probabilities for UV Transitions in the Spectrum of Cr II

Published

Author(s)

Jacob Ward, Jacqueline Li, Jared Schwartz, Gillian Nave, Ton Raassen, Peter H. M. Uylings

Abstract

We present transition probabilities for 268 spectral lines of singly-ionized chromium (Cr II) in the wavelength region 208 nm to 414 nm. Branching fractions were measured in archival Fourier transform spectra of chromium-argon and chromium-neon hollow cathode lamps and a Penning discharge source. They were combined with previously published experimental lifetimes of 14 levels, and with lifetimes from semi-empirical calculations for 14 levels. The estimated uncertainties of the transition probabilities range from 10 % to 26 %. A comparison with previously-published experimental transition probabilities shows discrepancies of a factor of 2 or more for lines around 213 nm.
Citation
Astrophysical Journal
Volume
959

Keywords

Atomic spectroscopy, Line intensities

Citation

Ward, J. , Li, J. , Schwartz, J. , Nave, G. , Raassen, T. and Uylings, P. (2023), Branching Fractions and Transition Probabilities for UV Transitions in the Spectrum of Cr II, Astrophysical Journal, [online], https://doi.org/10.3847/1538-4357/acfafe, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935786 (Accessed December 7, 2024)

Issues

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Created November 28, 2023, Updated July 22, 2024