Show simple item record

dc.contributor.advisorSitz, Greg Ormanen
dc.creatorIsakson, Marcia Joyceen
dc.date.accessioned2011-04-25T21:55:30Zen
dc.date.available2011-04-25T21:55:30Zen
dc.date.issued2002-05en
dc.identifier.urihttp://hdl.handle.net/2152/11014en
dc.descriptiontexten
dc.description.abstractThe effects of rotational alignment in surface scattering phenomena are studied. Alignment means a spatial preference for the plane of rotation. Specifically, changes in the reflection probability for H2 reaction with Pd(111) were studied for different molecular rotational alignments (helicopters vs. cartwheelers) and different incident translational energies. Experimentally, molecules were prepared with well-defined, non-statistical alignments using a linearly polarized laser before interaction with the surface. After scattering, the molecules were probed with another laser to determine their internal state. We found that the reflectivity of helicopter molecules was less than that of cartwheeler molecules. This effect increased with increasing incident energy. The result is interpreted as meaning that helicopters are more likely to dissociate than to scatter. The results are further evidence of steric forces in the H2/Pd interaction.
dc.format.mediumelectronicen
dc.language.isoengen
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.subjectScattering (Physics)en
dc.subjectMolecular rotationen
dc.subjectDissociationen
dc.titleThe effects of alignment on the dissociation of H₂ on Pd(111)en
dc.description.departmentPhysicsen
thesis.degree.departmentPhysicsen
thesis.degree.disciplinePhysicsen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen
dc.rights.restrictionRestricteden


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record