Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsa41b..02m&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SA41B-02
Physics
2400 Ionosphere (6929)
Scientific paper
By counting the UV and VUV photons emitted from a stored population of NO+ ions confined in a radio- frequency ion trap, we have observed the optical fluorescence of at least two long-lived excited states of NO+. These states lie above the NO+ a3Σ+ metastable state and have significantly shorter apparent lifetimes [1] than the a3Σ+ state. The measurements we present in this work were obtained as part of a systematic plan to study reaction rate coefficients, decay rates, and cross sections for metastable states of molecules containing nitrogen and/or oxygen. Small atomic and molecular ions, such as O+, O2+, O22+, N+, N22+, and NO+, are particularly relevant to the Earth's ionosphere. By improving our knowledge of radiative and collisional parameters associated with metastable states of these ions significant uncertainties in current ionospheric models will be minimized, and our understanding of the ionosphere will be improved. Data and tentative assignments of the radiative decay signals will be presented and discussed. [1] Calamai and Yoshino, J. Chem. Phys. 101, page 9480-9486 1994.
Calamai Anthony G.
Daw Adrian N.
Mount Elliot
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