NI, NII, OI and OII Emissions Produced Through Photoexcitation of N2 and O2
Abstract
Fluorescence spectra produced through photoexcitation of N2 and O2 using synchrotron radiation in the extreme ultraviolet region have been obtained. In the case of N2 study a high resolution spectroscopy beamline has been utilized to provide extreme ultraviolet photons with a bandwidth (fwhm) of 0.007 nm in spectral region between 45 and 62 nm. In the case of O2 a high flux beamline has been utilized to provide extreme ultraviolet photons at 52.5 nm, 87.0 nm, and the zero order white light. We have employed a 0.5-m spectrometer coupled with a position-sensitive-array detector to take images of fluorescence spectra. In addition to measure the fluorescence cross sections of NI and OI lines we are also searching for the production of NI 108.2706 nm and NII 108.5701 nm features, the OII 61.7 64.41, 67.3, 71.85, 83.4, 107.4, and 115.2 nm lines, and many others. We have carried out the above experiments so that the data can be applicable to the characterization of the N2 emissions in the atmospheres of Earth, Titan and Pluto, and possibly the dayglow OII 61.7 nm emission feature in the lower thermosphere of Earth. Detailed results will be presented. This research is based on work supported by NSF grant AST-0906158.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFMSA43B2082W
- Keywords:
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- 0310 ATMOSPHERIC COMPOSITION AND STRUCTURE / Airglow and aurora;
- 0335 ATMOSPHERIC COMPOSITION AND STRUCTURE / Ion chemistry of the atmosphere;
- 0343 ATMOSPHERIC COMPOSITION AND STRUCTURE / Planetary atmospheres;
- 2407 IONOSPHERE / Auroral ionosphere