Absolute differential and integral electron excitation cross sections for atomic oxygen. 9. Improved cross section for the [sup 3]P [r arrow] [sup 1]D transition from 4. 0 to 30 eV

Journal Article · Mon Nov 30 23:00:00 EST 1992 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/92JA02007· OSTI ID:6784834

Doering, J P ^[1]

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1. Johns Hopkins Univ., Baltimore, MD (United States)

The O I ([sup 3]P [r arrow] [sup 1]D) transition cross section has been remeasured for a new set of incident energies. In addition, a new O[sub 2] ([alpha] [sup 1][Delta][sub g] [l arrow] [Chi] [sup 3][Sigma][sub g][sup [minus]]) reference cross section set has been used to normalize the relative measurements. The previous results of Doering and Gulcicek have been revised to reflect the improved reference cross section set. The new results combined with the revised Doering and Gulcicek values show that theory and experiment are in excellent agreement at incident energies greater than 9 eV. However, at lower incident energies, the experimental cross section rises to a sharp peak near 6 eV. The peak in the experimental cross section is 5.4 [times] 10[sup [minus]17] cm[sup 2] ([plus minus] 35%) at 6 eV, approximately a factor of 2 larger than the theoretical cross section. The shape of this cross section vs. incident energy has many implications for aeronomy.

• OSTI ID: 6784834
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 97:A12; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 01-10
EV RANGE 10-100
INTEGRAL CROSS SECTIONS
NONMETALS
OXYGEN