RESEARCH ON METASTABLE SPECIES IN ATOMIC AND MOLECULAR BEAMS PRODUCED BY CHARGE TRANSFER. TASKS 1, 2, AND 3
Abstract
Two types of experiments are being used to study collisions between metastable species and ground state atoms and molecules. One type involves fast beams (energies between 150 and 1000 eV) containing excited particles, and is aimed at developing methods of detecting these species, as well as measuring cross sections for their collisional deexcitation. Studies of the detection and deexcitation of He 2-1S and 2-3S metastables are reported; the techniques developed for these studies are expected to be used for atmospheric species. The other type of experiment involves the production of metastables by rf excitation and photodissociation of low pressure gases. The mechanisms and rates of energy transfer between many excited and ground state species of particular importance in the upper atmosphere have been examined. Deactivation of O(1D), O(1S), O2(b1 sigma), and N2(A3 sigma) is discussed here. Another phase of our program has involved field measurements of emissions from Ba-Sr releases in the upper atmosphere.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 05, 1968
- Accession Number
- AD0679032
Entities
People
- G. Black
- J. R. Peterson
Organizations
- SRI International