Accession Number : AD0277383

Title :   GUENTER LOESER MEMORIAL LECTURE 1960. INTERPLANETARY IONIZATION BY SOLAR EXTREME ULTRAVIOLET RADIATION

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : HINTEREGGER,HANS H.

Report Date : DEC 1960

Pagination or Media Count : 1

Abstract : From recent rocket monochromator measurements of solar photon fluxes phi(lambda) between 1300 and 60 A around 200 km, the fluxes phi sub o characteristic of the upper F sub 2region and interplanetary space near the earth are estimated by assuming some reasonable spectral attenuation factors phi/phi sub o because of the atmospheric absorption above the point of observation. Ionization rates in terms of sigma sub j phi sub o are estimated for H, O, N, and N2. The estimated total ionization rate for the hydrogen atom of about 5 x 10 to the -7th power per sec implies a fractional ionization of at least 99.9% for total hydrogen particle number densities of less than about 500 per cc. (Author)

Descriptors :   *IONOSPHERE, *UPPER ATMOSPHERE, GEOPHYSICS, HELIUM, HYDROGEN, IONIZATION, NITROGEN, OXYGEN, PHOTONS, RADIATION EFFECTS, SOLAR RADIATION, SPACE ENVIRONMENTS, SPACE PROBES, ULTRAVIOLET RADIATION, X RAYS

Distribution Statement : APPROVED FOR PUBLIC RELEASE