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Rydberg spectroscopy of Fr-like thorium and uranium ions

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dc.contributor.authorHanni, Mark Earl, author
dc.contributor.authorLundeen, Stephen R., advisor
dc.contributor.authorBradley, R. Mark, committee member
dc.contributor.authorRoberts, Jacob Lyman, committee member
dc.contributor.authorYalin, Azer P., 1972-, committee member
dc.date.accessioned2007-01-03T04:51:42Z
dc.date.available2007-01-03T04:51:42Z
dc.date.issued2010
dc.description.abstractThe binding energies of high L Rydberg levels of Th3+ were measured using the resonant excitation Stark ionization spectroscopy (RESIS) technique. When analyzed using the long range polarization model the measured energies determine the dipole and quadrupole polarizability of the Th4+ ion: αd = 7.61(6) a.u. and αQ = 45(4) a.u. The RESIS technique and apparatus constructed for this study are discussed in this work. Modifications to the original design of the detector are presented. The modifications to the detector increased the energy resolution of the beams in the detector. It was determined that a significant source of background present in the observations of the U5+ Rydberg fine structure is due to the presence of auto-ionizing Rydberg states attached to metastable excited ion cores. These auto-ionizing states severely limit the fine structure observations, preventing the successful observation of any U5+ Rydberg fine structure. Also discussed are future directions that could lead to an increase in the signal to noise in the Th3+ fine structure observations and to a successful measurement of the dipole polarizability of U6+.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.identifierHanni_colostate_0053A_10171.pdf
dc.identifierETDF2010100006PHYS
dc.identifier.urihttp://hdl.handle.net/10217/44867
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectRydberg spectroscopy
dc.subjectRESIS technique
dc.subjectfr-like uranium
dc.subjectfr-like thorium
dc.subjectRydberg states
dc.subjectResonance ionization spectroscopy
dc.subjectActinium compounds
dc.subjectActinide elements
dc.titleRydberg spectroscopy of Fr-like thorium and uranium ions
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplinePhysics
thesis.degree.grantorColorado State University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (Ph.D.)

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