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 October 8, 2025)
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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, , 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
Pub Type
Journals
Download Paper
Keywords
Atomic spectroscopy, Line intensities
Citation
Issues
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Created November 28, 2023, Updated July 22, 2024