Electron-Impact-Induced Emission Cross Sections of Atomic Oxygen

Details Electron-Impact-Induced Emission Cross Sections of Atomic Oxygen Electron-Impact-Induced Emission Cross Sections of Atomic Oxygen

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dmp..hp09n&link_type=abstract

American Physical Society, DAMOP Meeting, 27-30 May 1998 Santa Fe, New Mexico, abstract #HP.09

Physics

Scientific paper

One cannot overstate the importance of ultraviolet (UV) lines of neutral atomic oxygen. For example, the atomic oxygen resonance transition at 130.4 nm is a prominent emission feature in the vacuum ultraviolet (VUV) spectrum of the Earth's aurora and dayglow as well as the atmospheres of Venus and Mars. In this poster, we present our measurements of the electron-impact emission cross sections of the 130.4 nm atomic oxygen feature from threshold to 100 eV impact energy. A high-density atomic oxygen beam, created by a microwave discharge source, was intersected at a right angle by a magnetically focused electron beam. A 0.2m UV spectrometer system was used in the present measurements. It consists of an electron-impact collision chamber in tandem with an UV spectrometer equipped with a CsI coated channel electron multiplier detector. Emitted photons corresponding to radiative decay of collisionally excited state of the 130.4 nm atomic oxygen feature were detected.

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