Accession Number : AD0713691

Title :   BASIC PROCESSES AND CROSS SECTIONS IN PROTON AURORAS.

Descriptive Note : Rept. for 15 May-15 Aug 70

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : McNeal,Robert J. ; Birely,John H.

Report Date : 08 SEP 1970

Pagination or Media Count : 18

Abstract : A proton aurora is a weak, diffuse emission readily identified by Doppler-shifted hydrogen lines in its spectrum. It is caused by precipitation of protons with a broad energy distribution that peaks near 1 ke V. For theoretical analysis of this aurora, cross sections for ionization and excitation of atmospheric constituents by energetic protons and hydrogen atoms are needed over a wide energy range. Recent measurements of these cross sections are reviewed in this paper, and preliminary results from this laboratory for excitation of some of the hydrogen emissions are reported. (Author)

Descriptors :   (*AURORAE, PROTONS), IONIZATION, EXCITATION, DIFFERENTIAL CROSS SECTIONS, INTERACTIONS, GRAPHICS, HYDROGEN

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE