EDP Sciences
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Volume 436, Number 3, June IV 2005
Page(s) 1141 - 1150
Section Atomic, molecular and nuclear data
DOI http://dx.doi.org/10.1051/0004-6361:20052847

A&A 436, 1141-1150 (2005)
DOI: 10.1051/0004-6361:20052847

Energy levels and radiative rates for transitions in Ar XIII, Ar XIV and Ar XV

K. M. Aggarwal1, F. P. Keenan1 and S. Nakazaki2

1  Department of Physics and Astronomy, Queen's University, Belfast BT7 1NN, Northern Ireland, UK
    e-mail: K.Aggarwal@qub.ac.uk
2  Department of Applied Physics, Faculty of Engineering, University of Miyazaki, Miyazaki 889-2192, Japan

(Received 9 February 2005/ Accepted 9 March 2005)

Energies for 524 levels of Ar XIII, 460 levels of Ar XIV and 156 levels of Ar XV have been calculated using the GRASP code of Dyall et al. (1989). Additionally, radiative rates, oscillator strengths, and line strengths are calculated for all electric dipole (E1), magnetic dipole (M1), electric quadrupole (E2), and magnetic quadrupole (M2) transitions among these levels. Comparisons are made with the limited results available in the literature, and the accuracy of the data is assessed. Our energy levels are estimated to be accurate to better than 1%, whereas results for other parameters are probably accurate to better than 20%. Additionally, the level lifetimes derived from our radiative rates are in excellent agreement with measured values.

Key words: atomic data -- atomic processes

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