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  • 1970-1974  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Measurements on the Lyman alpha corona (1971)
    Springer
    Solar physics 21 (1971), S. 392-400 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract As a result of a collaborative rocket experiment carried out during the solar eclipse on 7 March, 1970, measurements have been made of the brightness of Lyman α from the corona, at heights between 5 × 104 and 5 × 105 km above the limb. The emission is shown to occur primarily through the resonance scattering of chromospheric Lyman α from the residual neutral hydrogen in the corona. Both the absolute value and radial fall-off of the brightness agree well with calculations based on solar density models. The Lyman α emission has similar variations around the limb to the white light corona, showing in particular an equatorial enhancement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00154290
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dielectronic satellite spectra in the soft X-ray region (1972)
    Springer
    Space science reviews 13 (1972), S. 655-664 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Satellite lines, situated on the long wavelength side of the helium-like ion resonance line, can be observed in highly-ionized ions both in laboratory sources and from the Sun. Although seen for more than 30 years, these lines have only recently been classified in detail as inner-shell transitions in lithium-like ions. Laboratory experiments have shown that under steady-state conditions these satellites are produced by dielectronic recombination, although in transient ionizing plasmas direct inner-shell excitation can be important. Detailed calculations have been carried out for high Z ions up to copper, and the results can be compared with solar flare spectra in iron. Such comparisons allow both the electron temperature and the transient state of the plasma to be determined. Laboratory spectra from such high-Z ions are different in appearance, and may be dominated by processes resulting from the transient ionizing state of the plasma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213500
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Preface (1972)
    Springer
    Space science reviews 13 (1972), S. iii 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213473
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    Paper (German National Licenses)
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