Ionization contribution by cosmic X-rays

Mitra, A. P. ; Ramanamurty, Y. V. (1972) Ionization contribution by cosmic X-rays Radio Science, 7 (1). pp. 67-72. ISSN 0048-6604

Full text not available from this repository.

Official URL:

Related URL:


The contribution of cosmic X rays in the production of ionization in the nighttime D region is discussed in the light of observed X-ray flux emissions from the various celestial X-ray sources and from the galactic background. The cumulative effect of several sources when they are in transit at close time intervals can amount to a sizable fraction of all nighttime sources, which consist principally of scattered Ly α and Ly β. Above 95 km, the Ly β contribution is generally far in excess of the production due to cosmic X rays, but, at and around 90 km, the relative importances of cosmic X rays and scattered Ly α depend on the variation of the scattered Ly α flux, its variations with time, the nighttime concentrations of nitric oxide, and on the variations in the flux from the sources. Since some of these are uncertain, exact contributions are difficult to establish, but a marginal ionospheric effect around 90 km levels from cosmic X-ray sources seems possible at low latitudes.

Item Type:Article
Source:Copyright of this article belongs to American Geophysical Union.
ID Code:31661
Deposited On:15 Mar 2011 12:36
Last Modified:09 Jun 2011 10:09

Repository Staff Only: item control page