The production of free electrons in the ionospheric D layer by solar and galactic cosmic rays and the resultant absorption of radio waves
1962; American Geophysical Union; Volume: 67; Issue: 13 Linguagem: Inglês
10.1029/jz067i013p05091
ISSN2156-2202
Autores Tópico(s)Astrophysics and Cosmic Phenomena
ResumoJournal of Geophysical Research (1896-1977)Volume 67, Issue 13 p. 5091-5106 The production of free electrons in the ionospheric D layer by solar and galactic cosmic rays and the resultant absorption of radio waves William Webber, William WebberSearch for more papers by this author William Webber, William WebberSearch for more papers by this author First published: December 1962 https://doi.org/10.1029/JZ067i013p05091Citations: 114AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract The behavior of the D layer under bombardment by solar and galactic cosmic rays of energy greater than a few Mev is discussed. In particular, the variation with incident particle flux of the ionospheric parameters that determine the equilibrium electron density is deduced by means of the measurements of mid-day and mid-night absorption of cosmic radio noise corresponding to identical fluxes and spectrums of solar cosmic rays (protons). The values of the ionospheric parameters so obtained are then used in conjunction with differential solar proton spectrums of the form dJ/dP = Ke−p/p· to determine the electron densities and resultant absorption effects of cosmic radio noise in the range 3-30 Mc/s. Special attention is given to weak absorption effects in the ranges 3-10 Mc/s and to problems relating to the measurement of small, low-energy solar-particle events and to the changes in the low-energy portion of the spectrum of galactic cosmic rays. References Aiken, A. C., A preliminary study of sunrise effects in the D regionIonospheric Sci. Rept. 133Pennsylvania State University, 1960. Bailey, D. K., Abnormal ionization in the lower ionosphere associated with cosmic ray flux enhancements, Proc. IRE, 47, 255, 1959. Bailey, D. K., L. M. Branscomb, Rate coefficient for O-2 collisional detachment, Bull. Am. Phys. Soc., [2], 5, 123, 1960. Barth, C. A., Nitrogen and oxygen atomic reactions in the chemosphere, International Symposium on Chemical Reactions in the Lower and Upper Atmosphere, Interscience Publishers, New York, 1961. Biondi, M. 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