Accession Number : AD0291785

Title :   HELIUM IONS IN THE UPPER ATMOSPHERE

Corporate Author : QUEEN'S UNIV BELFAST (NORTHERN IRELAND)

Personal Author(s) : BATES,D.R. ; PATTERSON,T.N.L.

Report Date : 1962

Pagination or Media Count : 1

Abstract : Reasons are given for believing that ion-atom interchange between He(+) and N2 i strongly endothermic but that ion-atom interchange between H E(+)and O2 is exothermic. It is concluded that the former ion-atom interchange proce s does not occur to an appreciable extent but that the latter may be responsible for the re oval of the He(+) being produced by photoionization. Calculations are carried out on the steady state. In harmony with the prediction of Nicolet He(+) is found to be abundant at great altitudes even if a high rate coefficient is assigned to the collision process leading to its removal. Attention is drawn to the possibility that dissociative recombination f HeO(+) is important in connection with the problem of the escape of helium into interplanetary space. (Author)

Descriptors :   *ATOMS, *HELIUM, *IONS, *UPPER ATMOSPHERE, ATMOSPHERE MODELS, DISSOCIATION, NITROGEN, OXYGEN, RECOMBINATION REACTIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE