A spin-polarized He (2³S₁) metastable atom source for surface research

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dc.contributor.advisorWalters, G. King
dc.contributor.committeeMemberTrammell, George T.
dc.contributor.committeeMemberDunning, F. Barry
dc.creatorOnellion, Marshall
dc.date.accessioned2018-12-18T21:18:55Z
dc.date.available2018-12-18T21:18:55Z
dc.date.issued1981
dc.descriptionText includes handwritten formulas
dc.description.abstractSurface science has a paucity of probes, particularly for spin-dependent studies. This thesis describes a 2 3S1 He probe, recently developed in this laboratory, that can be used for such investigations. There are three interaction mechanisms such a probe can undergo: resonance ionization/ Auger neutralization, Auger deexcitation, or surface Penning ionization. All are discussed and compared. The important concepts introduced include electronic transitions, factors affecting the interactions, variation of atomic energy levels, and the convolution problem. After introducing these concepts, and describing the resulting physical phenomena, the experimental apparatus is examined. The thesis delineates the rationale for a multi-chamber design and the problems encountered. One diagnostic, a Stern-Gerlach magnet used as a polarization analyzer, is particularly useful and is described in detail. By using the analyzer, we found the beam is approximately 5 percent polarized. Finally, several problems related to the first experiments are discussed.
dc.format.digitalOriginreformatted digital
dc.format.extent105 pp
dc.identifier.callnoThesis Phys. 1981 Onellion
dc.identifier.citationOnellion, Marshall. "A spin-polarized He (2³S₁) metastable atom source for surface research." (1981) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104213">https://hdl.handle.net/1911/104213</a>.
dc.identifier.digitalRICE1841
dc.identifier.urihttps://hdl.handle.net/1911/104213
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.titleA spin-polarized He (2³S₁) metastable atom source for surface research
dc.typeThesis
dc.type.materialText
thesis.degree.departmentPhysics
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Arts
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