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dc.contributor.advisorSellinger, Alan
dc.contributor.authorHernandez, Griselda
dc.date.accessioned2018-10-04T16:02:25Z
dc.date.accessioned2022-02-03T13:11:08Z
dc.date.available2019-10-03T16:02:26Z
dc.date.available2022-02-03T13:11:08Z
dc.date.issued2018
dc.identifierHernandez_mines_0052N_11592.pdf
dc.identifierT 8567
dc.identifier.urihttps://hdl.handle.net/11124/172519
dc.descriptionIncludes bibliographical references.
dc.description2018 Summer.
dc.description.abstractScintillators have long been established for radiation detection and even date back to 1917 in which the use of a scintillator led to the discovery of the proton. Of particular interest are plastic scintillators (PS) which are low cost plastics doped with organic fluorescent compounds. In addition, PSs are of great interest due to their light weight, ambient stability, and ease of fabrication into complex and large geometries. Recent interest in PSs has become even more widespread due to their pulse shape discrimination (PSD) capabilities – the ability to detect and discriminate neutron (n) signals in gamma () radiation background. This is achieved by simply over doping 2,5-diphenyloxazole (PPO) in poly(vinyltoluene) matrices. However, over-doping PPO causes mechanical softening of the plastic, hindering its field deployment and overall widespread commercialization. It has also been observed that the dopant leaches out of the matrix which can reduce PSD capabilities and scintillator lifetimes. In an effort to improve current PSs, this project aims to enhance the mechanical and optical properties of PSs by co-polymerizing PPO designed monomers into a polymer matrix. To the best of our knowledge, the PPO monomers designed and synthesized as primary polymerizable dopants are reported here for the first time. Co-polymerizing PPO monomers into the matrix have proven to increase mechanical and thermal stability and have reached high loadings without the leaching of dopants to their surroundings. In addition, they have displayed high light outputs and great PSD adequate for n/ discrimination.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2018 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subject5-diphenyloxazole
dc.subjectlight yield
dc.subjectpolymerizable fluorophores
dc.subject2
dc.subjectplastic scintillators
dc.subjectcopolymers
dc.subjectpulse shape discrimination
dc.titlePolymerizable dopants capable of high light output and pulse shape discrimination for application in plastic scintillators
dc.typeText
dc.contributor.committeememberDomaille, Dylan
dc.contributor.committeememberGreife, Uwe
dcterms.embargo.terms2019-10-03
dcterms.embargo.expires2019-10-03
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineMetallurgical and Materials Engineering
thesis.degree.grantorColorado School of Mines
dc.rights.accessEmbargo Expires: 10/03/2019


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