The CHIANTI database has the following primary ASCII files for this ion:
contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.
%filename: ar_6.elvlc theoretical energies: J A Ludlow et al, J. Phys. B43 (2010), 074029, Open-ADAS Observed energy levels: Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2022). NIST Atomic Spectra Database (ver. 5.0), [Online]. Available: http://physics.nist.gov/asd [2023, October 28]. National Institute of Standards and Technology, Gaithersburg, MD. produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy K. Dere (GMU) - 2023 November 29
contains wavelengths, gf and A values of the transitions. The wavelengths are based on the experimental energy levels and should be the best available. Wavelengths calculated from the theoretical energies are of an indeterminate accuracy and their values are presented as negative values of the calculated wavelength.
%filename: ar_6.wgfa_adas_as J A Ludlow et al, J. Phys. B43 (2010), 074029, Open-ADAS gf values correspond to electric dipole transitions minimum branching ratio = 1.00e-05 produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy K. Dere (GMU) - 2023 December 12 2023 December 12
contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).
Fixed ntemps to match number of temperatures. 11-Oct-2024, Peter Young collision strengths provided in the range 7.20e+03 to 7.20e+06 K K. Dere (GMU) - 2023 December 13 produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy J A Ludlow et al, J. Phys. B43 (2010), 074029, Open-ADAS filename: ar_6.ups_adas_as filename ar_6.scups
Page created by Giulio Del Zanna on Wed Apr 16 17:42:14 2025