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Detection of small numbers of barium ions implanted in solid xenon for the EXO experiment

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dc.contributor.authorCook, Shon, author
dc.contributor.authorFairbank, William, advisor
dc.contributor.authorLee, Siu Au, committee member
dc.contributor.authorRoberts, Jacob, committee member
dc.contributor.authorBartels, Randy, committee member
dc.date.accessioned2007-01-03T08:11:03Z
dc.date.available2007-01-03T08:11:03Z
dc.date.issued2012
dc.description.abstractIn an effort to discover the yet-unknown absolute masses of neutrinos, the goal of the Enriched Xenon Observatory is to observe neutrinoless double beta decay of 136Xe. Identification of this very rare decay may be difficult even with the best conventional efforts to reduce and reject radioactive background, thus requiring additional background rejection via detection of the daughter 136Ba nucleus. One method of detection is laser-induced fluorescence of the barium atom in solid xenon. Spectra of very small numbers of barium atoms in solid xenon, as few as 3 atoms, are reported for the first time. Demonstration of detection of Ba atoms with large fluorescence efficiencies gives promise for detecting single atoms in the near future. Results from experiments involving implantation of Ba+ ions in solid xenon are discussed. One narrow excitation peak was discovered from ion beam deposition that was not found in neutral deposits. Five new emission lines are found with this same excitation spectrum. Bleaching, annealing, and laser dependence of these lines are studied. The identification of the new Ba species as Ba+ or as a barium molecule is discussed.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.identifierCook_colostate_0053A_11343.pdf
dc.identifierETDF2012500213PHYS
dc.identifier.urihttp://hdl.handle.net/10217/68100
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.titleDetection of small numbers of barium ions implanted in solid xenon for the EXO experiment
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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