Satellite lines in the solar X-ray spectrum.

Details Satellite lines in the solar X-ray spectrum. Satellite lines in the solar X-ray spectrum.

Jul 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971soph...18..474n&link_type=abstract

Solar Physics, Volume 18, Issue 3, pp.474-488

Physics

42

Scientific paper

Observations of solar X-ray line emission using crystal spectrometers during a large chromospheric flare have provided a list of wavelengths with a precision of 0.003 Å in first order of diffraction and correspondingly better in higher orders. In addition to the resonance, intersystem (1 1 S 0-2 3 P 1) and forbidden (1 1 S 0-2 3 S 1) transitions of ions of the Hei isoelectronic sequence, we have recorded satellite lines arising from ions in the Lii, Bei and Bi isoelectronic sequences. These satellite features are most prominent in the iron spectrum. Apparent decreases in the ratio of forbidden and intersystem line intensities of Mgxi and Sixiii during the flare are used to derive electron densities possibly as high as 1 × 1013 cm-3 in the Mgxi emitting region and 1 × 1014 cm-3 in the Sixiii region during the event. A search for satellite lines on the long-wavelength side of the Lyman-alpha line of Hi-like ions has yielded no positive identifications.

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