Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Long Wavelength Satellites to the He-like Ion Resonance Lines in the Laboratory and in the Sun (1969)
    [s.l.] : Nature Publishing Group
    Nature 221 (1969), S. 947-949 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The laboratory satellites were first reported by Edlen and Tyren1, who attributed them to the normal 1s2-1s2p transition in the presence of an additional outer electron Is2nl-ls2pnl The prominent satellites were attributed to n = 2. Those with higher n rapidly move closer to, and merge with, the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/221947a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The identification of new forbidden coronal lines in the solar EUV spectrum (1971)
    Springer
    Solar physics 21 (1971), S. 381-391 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Identifications are proposed for twenty of the twenty-eight coronal lines observed in the spectra obtained during a rocket flight into the path of the 7 March, 1970 solar eclipse. The methods by which the lines have been identified are discussed. Most of the lines identified are from forbidden transitions between levels in the ground 2p n and 3p n configurations in high ions of magnesium, silicon, sulphur, iron, and nickel. The temperature range represented is from 6.9 × 105 K to 2.5 × 106 K. The classification of three lines of Fexii and two of Nixiv has led to a revised identification for the near ultraviolet 2 D 3/2-2 P 1/2 transition in Fe xii. This transition can be identified with the line at 3072 Å rather than that at 3021 Å as previously suggested in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00154289
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Classification of Iron Lines in the Spectrum of the Sun and Zeta in the Range 167 Å to 220 Å (1965)
    [s.l.] : Nature Publishing Group
    Nature 206 (1965), S. 390-392 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] At Culham, new experimental results, recently obtained, have led to the classification of many of the more intense lines in this group. It is the purpose of this communication to give a preliminary account of this work. A paper in course of preparation will detail the reasons leading to these ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/206390a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Little and large (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 640-640 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE interaction between atomic physics and astrophysics has its origins in work of the nineteenth-century spectroscopists, who used stellar spectra to establish em pirical formulae to describe the series of lines observed. Thus began a fruitful dialogue - discoveries from astrophysical spectra ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303640a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    The relative intensities of CI lines in the solar EUV spectrum (1967)
    Springer
    Solar physics 2 (1967), S. 441-450 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The relative intensity of two Ci lines at 1993.6 Å and 1657.4 Å, observed in the limb spectrum of the sun, is a factor 2.6 × 103 larger than that expected if both lines were optically thin. It is shown that the observed intensity ratio may be explained in terms of the transfer of photons from λ 1657.4 Å to λ 1993.6 Å due to a large optical depth in the line at 1657.4 Å. The observed upper limit on the relative intensity of two further lines at 1992.0 Å and 1657.0 Å has been used to show that the line at 1993.6 Å is optically thin. Hence it is shown that τ(1657.4 Å) = 1300, and τ(1993.6 Å) = 0.44. These values provide an independent evaluation of optical depths against which chromospheric models may be checked. Assuming a mean temperature of T e = 8000 °K, and a mean scale height of 350 km, the optical depths lead to a mean hydrogen-particle density of N (H) = 1.4 × 1012 cm−3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00146492
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The relative abundance of silicon and iron in the solar corona (1968)
    Springer
    Solar physics 4 (1968), S. 104-107 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00147004
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Identifications of emission lines in the EUV solar spectrum (1972)
    Springer
    Space science reviews 13 (1972), S. 595-605 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Conclusions During the past three years there have been significant extensions of the solar data available. Over most of the solar spectrum between 1 Å – 2200 Å the new or improved observations have led to interesting problems in line identifications. The identifications have in turn led to new methods of determining the physical conditions in the solar atmosphere, eg electron density determinations from the Hei like ion intercombination line to forbidden line ratio (Gabriel and Jordan, 1969b). The majority of the strong lines have now been identified, either by theoretical considerations or from the extensive laboratory data which have recently become available. However, weak lines may also aid the understanding of the chromosphere and corona and work on the identifications of all remaining features observed must continue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00213490
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...