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  • 1960-1964  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Detection of Negative Ions formed by Charge Transfer (1960)
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 1038-1039 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] On the other hand, the cross-section shows no such variation for argon. Thus it seems likely that the sudden increases which occur in the cross-section for electron loss are associated with a process which leaves the electron attached to the target molecule or a fragment of it after the collision ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1861038a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Excitation of the Lyman-α in the night sky (1962)
    Springer
    Space science reviews 1 (1962), S. 135-153 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The experiments pertaining to the excitations of Lyman-α radiation in the night sky are reviewed. Various possible modes of excitation are considered. Scattering of solar Lα in interplanetary hydrogen is not suitable because of an insufficient amount of hydrogen and difficulty in accounting for the large night time albedo contrasted with the small daytime value. Transport by multiple scattering in the exosphere produces an appreciable excitation as well as the correct variation of intensity as function of zenith angle. However, the process fails by a factor of 4 for a solar flux of 6 ergs/cm2 sec and the 3 × 1012 atoms/cm2 geocorona consistent with absorption measurements. A direct scattering in a geocoma far from the earth overcomes the albedo and thin atmosphere problems. However, there is difficulty in accounting for the presence of the amount of hydrogen necessary beyond 15 earth radii. Also the absence of Hα excitation by Lyman-β is a problem. No explanation so far proposed appears adequate. Experiments are suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00174639
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    Paper (German National Licenses)
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