AN ATOMIC OXYGEN TARGET FOR DIFFERENTIAL CROSS SECTION MEASUREMENTS

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dc.creatorHakes, Charles Lynn
dc.date.accessioned2007-05-09T17:58:25Z
dc.date.available2007-05-09T17:58:25Z
dc.date.issued1987
dc.description.abstractAtomic oxygen, an abundant upper atmospheric species, is an important target in collisions involving fast ions and neutrals precipitating into the Earth's thermosphere. To facilitate the laboratory study of these collisions and to measure their differential cross sections, an appropriate atomic oxygen target has been developed. Oxygen atoms for the target are produced by electron-impact dissociation of O$\sb2$ in a discharge created in a microwave cavity resonant at 2.54 GHz. Thirty percent of the added molecular oxygen at 50 mTorr is dissociated in the discharge. The atomic and molecular oxygen mixture flows through a phosphoric acid coated pyrex tube to a fluorocarbon coated target cell. The dissociation fraction in the target cell is determined by titration with NO$\sb2$ and by analysis with a time-of-flight mass spectrometer.
dc.format.mimetypeapplication/pdf
dc.identifier.callnoThesis Sp. Sci. 1987 Hakes
dc.identifier.citationHakes, Charles Lynn. "AN ATOMIC OXYGEN TARGET FOR DIFFERENTIAL CROSS SECTION MEASUREMENTS." (1987) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/13222">https://hdl.handle.net/1911/13222</a>.
dc.identifier.urihttps://hdl.handle.net/1911/13222
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectAtomic physics
dc.titleAN ATOMIC OXYGEN TARGET FOR DIFFERENTIAL CROSS SECTION MEASUREMENTS
dc.typeThesis
dc.type.materialText
thesis.degree.departmentSpace Science
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Arts
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