On the extreme ultraviolet solar emission of B-like ions - NA VII, SI X and S XII

Details On the extreme ultraviolet solar emission of B-like ions - NA VII, SI X and S XII On the extreme ultraviolet solar emission of B-like ions - NA VII, SI X and S XII

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....45..349f&link_type=abstract

Astronomy and Astrophysics, vol. 45, no. 2, Dec. 1975, p. 349-352.

Astronomy and Astrophysics

Astrophysics

60

Atomic Structure, Far Ultraviolet Radiation, Ion Emission, Solar Corona, Solar Spectra, Ultraviolet Spectroscopy, Boron, Electron Transitions, Silicon, Sodium, Solar Corpuscular Radiation, Spin-Orbit Interactions, Sulfur, Transition Probabilities

Scientific paper

Computations of radiative and collisional atomic data for the boron isoelectronic sequence are extended to include Na VII, Si X, and S XII. The data presented include weighted oscillator strengths and spontaneous radiative transition probabilities for each transition and multiplet, collisional strengths at three energies relative to the ground term, and emissivity ratios for specified conditions. The calculations indicate that both spin-orbit and configuration interactions must be taken into accout to obtain accurate 2s(2)2p-2s2p(2) allowed transition probabilities for highly ionized members of the boron isoelectronic sequence. It is shown that the allowed EUV transitions of Si X and X XII enable the coronal electron density to be determined. Apparent discrepancies in some of the data are discussed.

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