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Measurement of Wavelengths and Abundances from Solar Flare X-Ray Spectra

Published online by Cambridge University Press:  12 April 2016

J.F. Seely ,
U. Feldman  and
G.A. Doschek
J.F. Seely
Affiliation:
E.O. Hulburt Center for Space Research Naval Research Laboratory Washington, DC 20375-5000
U. Feldman
Affiliation:
E.O. Hulburt Center for Space Research Naval Research Laboratory Washington, DC 20375-5000
G.A. Doschek
Affiliation:
E.O. Hulburt Center for Space Research Naval Research Laboratory Washington, DC 20375-5000

Extract

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The measurement of transition energies in highly charged ions represents an important test of quantum electrodynamics (QED) in strong fields. The OED contributions to the hydrogenic transition energies increase as (αZ)4, where α is the fine structure constant and Z is the atomic number. Transitions in hydrogenic ions of sulfur, chlorine, argon, and iron have previously been measured to a precision of 100 ppm or better. These measurements are in satisfactory agreement with accurate calculations of the energy levels, and this confirms the calculation of the QED contributions to the energy levels of one-electron ions.

Type
Session 6. Poster Papers
Information
International Astronomical Union Colloquium , Volume 86: Eighth International Colloquium on Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas , 1984 , pp. 151 - 153
Copyright
Copyright © Naval Research Laboratory 1984. Publication courtesy of the Naval Research Laboratory, Washington, DC.

References

Drake, G.W.F. 1984, private communications.Google Scholar
Ermolaev, A.M., and Jones, M. 1974, J. Phys. B 1, 199, and unpublished supplement.Google Scholar
Safronova, U.I. 1981, Phys. Scripta 23, 241.CrossRefGoogle Scholar