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

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dc.contributor.advisorWalters, G. Kingen_US
dc.contributor.committeeMemberTrammell, George T.en_US
dc.contributor.committeeMemberDunning, F. Barryen_US
dc.creatorOnellion, Marshallen_US
dc.date.accessioned2018-12-18T21:18:55Zen_US
dc.date.available2018-12-18T21:18:55Zen_US
dc.date.issued1981en_US
dc.descriptionText includes handwritten formulasen_US
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.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent105 ppen_US
dc.identifier.callnoThesis Phys. 1981 Onellionen_US
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>.en_US
dc.identifier.digitalRICE1841en_US
dc.identifier.urihttps://hdl.handle.net/1911/104213en_US
dc.language.isoengen_US
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.en_US
dc.titleA spin-polarized He (2³S₁) metastable atom source for surface researchen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentPhysicsen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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