Electron impact excitation of lambda 7990-A multiplet

Details Electron impact excitation of lambda 7990-A multiplet Electron impact excitation of lambda 7990-A multiplet

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7245e&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Sept. 1, 1983, p. 7245-7249.

Physics

18

Airglow, Atomic Excitations, Auroral Spectroscopy, Electron Impact, Infrared Spectra, Oxygen Spectra, Dissociation, Fine Structure, Nitrogen, Radiation Trapping, Ultraviolet Absorption

Scientific paper

The authors have investigated the dissociative excitation of the atomic oxygen multiplet O I (3sarcmin3D0→3p3P; λ7990 Å) due to electron impact on O2 and NO. The results are consistent with a λ7990/λ989 branching ratio of ≡2.5×10-5 that is at least an order of magnitude smaller than either the previous experimental upper limits or a recent theoretical calculation. This finding complicates the study of (3sarcmin3D0→2P4 3P; λ989 Å) radiation entrapment in the thermosphere and increases the potential importance of selective absorption of the λ989-Å multiplet by N2. Although the latter process may help to explain some aspects of the behaviour of λ7990-Å emission in aurorae, it is nonetheless difficult, in the light of the present results, to account for the observed absolute intensity of this infrared cascade transition using current entrapment models.

Affiliated with

Also associated with

No associations

Rating

Electron impact excitation of lambda 7990-A multiplet does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Electron impact excitation of lambda 7990-A multiplet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron impact excitation of lambda 7990-A multiplet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1593021