Spectroscopy of Ba and Ba⁺ Deposits in Solid Xenon for Barium Tagging in nEXO

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dc.contributor.author Piepke, Andreas
dc.date.accessioned 2019-05-14T20:23:18Z
dc.date.available 2019-05-14T20:23:18Z
dc.date.issued 2015-02-10 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/5538
dc.description.abstract Progress on a method of barium tagging for the nEXO double beta decay experiment is reported. Absorption and emission spectra for deposits of barium atoms and ions in solid xenon matrices are presented. Excitation spectra for prominent emission lines, temperature dependence, and bleaching of the fluorescence reveal the existence of different matrix sites. A regular series of sharp lines observed in Ba⁺ deposits is identified with some type of barium hydride molecule. Lower limits for the fluorescence quantum efficiency of the principal Ba emission transition are reported. Under current conditions, an image of fewer than or equal to 10⁴ Ba atoms can be obtained. Prospects for imaging single Ba atoms in solid xenon are discussed. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.subject Atomic spectra en_US
dc.subject Fluorescence, phosphorescence (including quenching) en_US
dc.subject β decay; double β decay; electron and muon capture en_US
dc.subject Neutrino mass and mixing en_US
dc.title Spectroscopy of Ba and Ba⁺ Deposits in Solid Xenon for Barium Tagging in nEXO en_US
dc.type text en_US

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