Radiative, collisional atomic and Stark broadening data for Ar XII and Ar XIV ions: Quantum mechanical calculations

• Published in: Journal of quantitative spectroscopy & radiative transfer 2019-12, Vol.239, p.106675, Article 106675
• Main Authors: Aloui, Rihab, Elabidi, Haykel, Sahal-Bréchot, Sylvie
• Format: Article
• Language: English
• Subjects: Astrophysics; Atmospheres; Atomic data; Line profiles; Physics; Solar and Stellar Astrophysics; Stark line broadening; White dwarfs
• ISSN: 0022-4073; 1879-1352
• DOI: 10.1016/j.jqsrt.2019.106675

•New calculations of quantum mechanical line widths for the two ions Ar XII and Ar XIV.•No other results in the literature to perform comparisons.•The temperature range is sufficiently large and useful for plasma investigations and other astrophysical applications.•Radiative and collisional atomic data including energies, radiative decay rates, oscillator strengths, line strengths and collision strengths have been presented.•Good agreement has been found between our atomic data and other calculations. We present in this work Stark broadening calculations for 12 Ar XII and 12 Ar XIV lines. We present also their radiative atomic and collision data (energy levels, radiative decay rates, line strengths, oscillator strengths and collision strengths). Our Stark broadening data have been obtained using our quantum method in the impact approximation frame and including fine structure effects in the structure study. Our results are provided for the range of temperatures from 5 × 105 to 5 × 106 K of interest for plasmas investigations, and at electron density Ne=1018 cm−3. The radiative atomic data have been calculated using the UCL code SUPERSTRUCTURE. The collision strengths have been calculated using the two UCL codes DISTORTED WAVE and JAJOM. Good agreement have been found between our atomic results and other theoretical and experimental ones. Our Stark broadening data are the first to be published, so no comparisons have been performed for them.