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_5.elvlc.adas theoretical energy levels 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) - 2024 January 03
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_5.wgfa theoretical energy levels and A-values J A Ludlow et al, J. Phys. B43 (2010), 074029, Open-ADAS A-values (ground configuration only): Biemont, E., & Bromage, G.E., 1983, MNRAS, 205, 1085 gf values from an Autostructure calculation A Breit-Pauli distorted wave implementation for AUTOSTRUCTURE Badnell, N.R., 2011, Computer Physics Communications, 182, 1528 ADSref: http://adsabs.harvard.edu/abs/2011CoPhC.182.1528B wavelengths determined from energy level file = ar_5.elvlc 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. minimum branching ratio = 1.00e-04 produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy K. Dere (GMU) - 2024 January 04 2024 January 04 Swapped Ludlow A-values for Biemont & Bromage due to anomalies for these transitions. - P.R. Young (NASA) - 2024 October 03
contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).
were in the CHIANTI 10.1 model); corrected "ntemps" from 10 to 12 for the Ludlow data. Replaced the Ludlow ground configuration upsilons with those from Galavis et al. (which 7-Oct-2024, Peter Young K. Dere (GMU) - 2024 January 04 produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy ADSref: http://adsabs.harvard.edu/abs/2011CoPhC.182.1528B Badnell, N.R., 2011, Computer Physics Communications, 182, 1528 A Breit-Pauli distorted wave implementation for AUTOSTRUCTURE gf values from an Autostructure calculation collision strengths provided in the range 5.00e+03 to 5.00e+06 K J A Ludlow et al, J. Phys. B43 (2010), 074029, Open-ADAS For all other levels: Note: The fits are accurate to within 0.59% over the temperature range 3.0 <= logT <= 5.0. Galavis, M.E., Mendoza, C., Zeippen, C.J. 1995, A&ASS 111, 347 For ground configuration levels (1-5): theoretical effective collision strengths: filename ar_5.scups
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