Approximations for proton excitation - Erratum and extension

Details Approximations for proton excitation - Erratum and extension Approximations for proton excitation - Erratum and extension

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....71..211k&link_type=abstract

Astronomy and Astrophysics, vol. 71, no. 1-2, Jan. 1979, p. 211-213.

Astronomy and Astrophysics

Astrophysics

30

Atomic Excitations, Proton Energy, Quantum Theory, Solar Corona, Solar Protons, Atomic Energy Levels, Cross Sections, Rates (Per Time), Transition

Scientific paper

Kastner (1977) proposed relatively simple approximations for proton excitation in coronal ions, which yield both excitation rate coefficients and excitation cross sections. An error in Kastner's expression for one of the partial excitation rate coefficients is corrected. The expression for excitation cross section is extended to higher energies, and the resulting expression for the other partial rate coefficient is given. Results obtained with the corrected and extended total excitation rate coefficient are presented for several representative transitions in Ca XIII, Ca XV, Fe X, Fe XIII, Fe XIV, Fe XVIII, and S X. The corrected and extended approximation is expected to yield excitation rates reliably within 50%.

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