Excitation of the Na D-doublet of the nightglow

Details Excitation of the Na D-doublet of the nightglow Excitation of the Na D-doublet of the nightglow

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.286..790b&link_type=abstract

Nature, vol. 286, Aug. 21, 1980, p. 790, 791.

Physics

4

Atomic Collisions, Nightglow, Radiant Flux Density, Sodium, Branching (Physics), Chapman-Enskog Theory, Electron States, Oxygen

Scientific paper

It is inferred from the absolute intensity of the nocturnal D-doublet emission, the abundance of free Na and other relevant information that there is very little possibility of an alternative to Chapman's theory that the excited Na atoms involved are released by NaO-O collisions. The nature of the collision process is discussed. It is pointed out that a remarkably high branching ratio for the reaction path leading to excited (rather than normal) sodium is necessary. A high branching ratio is explained by considering the symmetry properties of the correlated electronic states.

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