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Detailed Reference Information |
Ajello, J.M., Pang, K.D., Franklin, B.O., Howell, S.K. and Bowring, N.J. (1989). A study of electron impact excitation of NO: The vacuum ultraviolet from 40 to 170 nm. Journal of Geophysical Research 94: doi: 10.1029/89JA00202. issn: 0148-0227. |
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The electron impact induced fluorescence spectrum of NO at 200 eV has been measured in a crossed-beam experiment. The wavelength range studied spanned the range of the vacuum ultraviolet (VUV) from 40 to 170 nm. The basis of the absolute cross sections was the newly established Ly &agr; cross section standard from electron impact dissociation of H2. By comparison with this standard the cross section of the N I (120.0 nm) transition produced by dissociative excitation of 200 eV was established to be 1.73¿0.38¿10-18 cm2. The cross section of all other features in the VUV were measured. The extreme ultraviolet spectrum from 40 to 120 nm consists entirely of emissions from excited N I, N II, O I, and O II atomic dissociation fragments. In addition, in the far ultraviolet (FUV) from 120 to 170 nm we report a measurement of the cross section of the NO+(A1∏ →X1∑+) Baer--Miescher (BM) bands. We develop a band model of the FUV spectrum which consists of the BM bands, including the known variation of the electronic transition moment and the &bgr;' bands (B'2Δi→X2 ∏r). Identification of the (4, 0) &bgr;' band has allowed an estimate of the electronic emission cross section of the B'2Δi→X2∏r transition. ¿ American Geophysical Union 1989 |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Airglow and aurora, Atmospheric Composition and Structure, Ion chemistry of the atmosphere, Ionosphere, Auroral ionosphere, Planetology, Solid Surface Planets, Atmospheres—composition and chemistry |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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