Accession Number : AD0757505

Title :   Laboratory Studies of Collisions of Energetic H(+) and H with Atmospheric Constituents.

Descriptive Note : Rept. for Jan-Nov 72,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

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

Report Date : 30 DEC 1972

Pagination or Media Count : 158

Abstract : In the paper, the authors present an account of the current status of laboratory measurements applicable to the interaction of fast protons and hydrogen atoms with the earth's atmosphere. Data are also presented for some gases found in the atmospheres of other planets. After a brief discussion of recent measurements of the auroral particle energy spectra in order to define the energy range for relevant laboratory measurements, the motion of energetic protons in the atmosphere is discussed to eludicate further the cross sections and quenching processes of interest. A review of ionization experiments follows with emphasis on data acquired in the last decade. Cross sections for excitation of the atmospheric target gases and fast hydrogen projectiles are then presented. Application of the data to auroral calculations is also discussed. (Author)

Descriptors :   (*UPPER ATMOSPHERE, PROTON BOMBARDMENT), (*AURORAE, PROTONS), (*PROTON BOMBARDMENT, *GAS IONIZATION), HYDROGEN, EXCITATION, DIFFERENTIAL CROSS SECTIONS, EMISSIVITY, ELECTRONS, ATOMS, NITROGEN, OXYGEN, DISSOCIATION

Subject Categories : Atmospheric Physics
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE