Electronic Excitation in Collisions of Fast Protons and Hydrogen Atoms with NO, N2O, CO2, and OCS.
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Pagination or Media Count:
Analyses of radiation in the 115- to 850-nm range produced by collisions of 10 to 25 keV and H and H with NO, N2O, CO2, and OCS under thin target conditions have been carried out. The most prominent features for the polyatomic targets are emitted by excited parent molecule ions. Except in the case of OCS, for which weak CO bands were detected, the cross sections for dissociative excitation to yield diatomic fragments are extremely small. These observations in conjunction with results obtained elsewhere for other projectile ions provide further evidence that, in the competition among allowed excitation channels, details of the electronic structure of the collision partners override energy considerations. For an NO target, the NO bands are observed and, for all of the molecules studied, atomic lines resulting from dissociative excitation are prominent in the spectra.
- Atomic and Molecular Physics and Spectroscopy