Critically Evaluated Spectral Data for Singly Ionized Carbon (C II)

Published

May 4, 2022

Author(s)

Alexander Kramida, K. Haris

Abstract

All available experimental data on the spectrum of singly ionized carbon have been critically analyzed. Measurement uncertainties of all published studies have been re-assessed. The scope of observational data includes laboratory emission spectra of arcs, sparks, electrodeless discharges, and hollow cathode lamps recorded with grating and Fourier transform spectrometers, laboratory photoabsorption spectra, and emission spectra of planetary nebulae. The total number of observed spectral lines included in this compilation is 597. These lines participate in 972 transitions. From this list of identified transitions, we have derived a set of 414 energy levels, which are optimized using a least-squares fitting procedure. The identifications are supported by parametric calculations with Cowan's codes. The existing tables of critically evaluated transition probabilities have been extended with our newly calculated data. The ionization energy has been derived from the newly optimized energy levels with improved precision. Data on isotope shifts and hyperfine structure have also been compiled.

Citation

Astrophysical Journal Supplement Series

Volume

260

Pub Type

Journals

Download Paper

https://doi.org/10.3847/1538-4365/ac5401

Local Download

Keywords

Atomic data, spectral lines, energy levels, line identification, line intensities, ionization energy, transition probabilities, carbon ion

Citation

Kramida, A. and Haris, K. (2022), Critically Evaluated Spectral Data for Singly Ionized Carbon (C II), Astrophysical Journal Supplement Series, [online], https://doi.org/10.3847/1538-4365/ac5401, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933633 (Accessed April 27, 2024)