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  • 1995-1999  (2)
  • 1980-1984  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Opacity in the Si iii Spectrum (1998)
    Springer
    Solar physics 182 (1998), S. 37-63 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The opacities of the Si iii resonance line at 1206.5 Å and component lines of the UV 4 multiplet near 1300 Å are analyzed and re-examined in published spectra, taking account of improved expressions for photon escape probabilities and making use of an intensity/linewidth analysis recently developed. Level populations and line intensities are computed to extend knowledge of the optically thin spectrum to lower densities. Diagnostic diagrams of line ratios are included. Opacities are found to be higher than in previous treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005057808400
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Expected intensities of solar forbidden lines emitted from 2p k (k = 2, 3, 4) configurations (1983)
    Springer
    Solar physics 85 (1983), S. 41-51 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Predicted intensities of all significant transitions within the ground configurations of six-, seven-, and eight-electron ions are tabulated for solar conditions, on a common scale. Some applications of the table entries to line identification and emission measure analysis are presented, including proposed Mg vi classifications for the coronal lines 3488.5 Å and 3502.5 Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00148256
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Proposed Mg V, Fe XIV and forbidden Fe XVII line identifications in the EUV solar spectrum (1982)
    Springer
    Solar physics 81 (1982), S. 59-61 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some line identifications in solar disk and limb spectra are proposed on the basis of recent laboratory and theoretical results reported in the literature, including allowed lines of Mgi and Fexiv in the EUV spectrum and an expected forbidden line of Fexvii near 1190 Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151979
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Diagnostic application of highly ionized iron lines in the XUV spectrum of a solar flare (1984)
    Springer
    Solar physics 92 (1984), S. 199-216 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Recent atomic data have been used to analyze a solar flare spectrum obtained with the Goddard Space Flight Center's grating spectrometer on the OSO-5 satellite. There exist in the wavelength region 90–200 Å strong lines from each of the ions Fe xviii-Fe xxiv. The Fe xxi lines can be used as an electron density diagnostic for the 107 K plasma. From our analysis of a particular flare, we find a steep positive slope in the emission measure between 106.5 and 107.2 K and an electron density of ∼4 × 1011 cm−3 at 107 K. We emphasise the need for high spectral and spatial resolution observations of solar flares in this wavelength region, which has to date been largely neglected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00157246
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The coronal spectra of Fe xv and Ni xvii (1980)
    Springer
    Solar physics 65 (1980), S. 181-196 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Predicted allowed and forbidden EUV line intensities of Fe xv and Ni xvii are presented in explicit graphical form, clarifying and extending the earlier treatment of Bely and Blaha (1968). In the case of the former ion a detailed comparison with available observations leads to questioning or rejection of some presently accepted line identifications (323.57 Å, 317.61 Å), and on the other hand suggests that a quiet Sun line at 304.853 Å is due to Fe xv. For the little known ion Ni xvii estimates of level structure and line wavelengths are given and a preliminary comparison is made with recent flare observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151392
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Symbolic Evaluation of Total Transition Probabilities in Kinetic Systems; Potential Applications (1997)
    Springer
    Journal of scientific computing 12 (1997), S. 371-384 
    Details
    ISSN: 1573-7691
    Keywords: Kinetic systems ; conditional probabilities ; symbolic evaluation ; ordinary differential equations ; stiff systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract The significance and possible applications of conditional “total” transition probability expressions t ij, earlier defined and shown to be basic properties of physical kinetic systems, are reviewed and discussed. A program to carry out explicit evaluation of these quantities is presented, which may facilitate their use in applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1025672812125
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    Paper (German National Licenses)
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