Radiative rates and electron impact excitation rates for H-like Ar XVIII

K. M. Aggarwal, K. Hamada, A. Igarashi, V. Jonauskas, F. P. Keenan, S. Nakazaki

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Abstract

Aims. In this paper we report on calculations for energy levels, radiative rates, collision strengths, and effective collision strengths for
transitions among the lowest 25 levels of the n ≤ 5 configurations of H-like Ar xviii.
Methods. The general-purpose relativistic atomic structure package (grasp) andDirac atomic R-matrix code (darc) are adopted for
the calculations.
Results. Radiative rates, oscillator strengths, and line strengths are reported for all electric dipole (E1), magnetic dipole (M1), electric
quadrupole (E2), and magnetic quadrupole (M2) transitions among the 25 levels. Furthermore, collision strengths and effective
collision strengths are listed for all 300 transitions among the above 25 levels over a wide energy (temperature) range up to 800 Ryd
(107.4 K).
Original languageEnglish
Pages (from-to)383-388
JournalAstronomy & Astrophysics
Volume487
DOIs
Publication statusPublished - Aug 2008

ASJC Scopus subject areas

  • Space and Planetary Science

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