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Contribution to the higher levels of neutral helium atoms deviating from Boltzmann distribution

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Abstract

The deviations from Boltzmann distribution have been carried out for higher energy levels of neutral helium atoms. The computations have been done up to the quantum numbern=10, for variety of both electron temperature (T e) and radiation temperature (T s). Furthermore, computations for more values of the dilution factor (W) enable applications of results to atmospheres of intermediate heights and to lower parts of stellar atmosphere. Also for the special casesT e=T s=10080 K, 20160 K andW=0.3, 0.1, and 1.00, was treated, to afford at least a rough comparison between the new and old results.

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Authors and Affiliations

  1. National Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt

    M. Bahgat El-Shaarawy

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  1. M. Bahgat El-Shaarawy
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El-Shaarawy, M.B. Contribution to the higher levels of neutral helium atoms deviating from Boltzmann distribution. Astrophys Space Sci 178, 45–69 (1991). https://doi.org/10.1007/BF00647115

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  • DOI: https://doi.org/10.1007/BF00647115

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