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'Searching for a needle in a haystack;' A Ba-tagging approach for an upgraded nEXO experiment
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abstract
nEXO is a proposed experiment that will search for neutrinoless double-beta decay (0$\nu\beta\beta$) in 5-tonnes of liquid xenon (LXe), isotopically enriched in $^{136}$Xe. A technique called Ba-tagging is being developed as a potential future upgrade for nEXO to detect the $^{136}$Xe double-beta decay daughter isotope, $^{136}$Ba. An efficient Ba-tagging technique has the potential to boost nEXO's 0$\nu\beta\beta$ sensitivity by essentially suppressing non-double-beta decay background events. A conceptual approach for the extraction from the detector volume, trapping, and identification of a single Ba ion from 5 tonnes of LXe is presented, along with initial results from the commissioning of one of its subsystems, a quadrupole mass filter.
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Cited by 1 Pith paper
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Canadian Contributions to the Search for Neutrinoless Double Beta Decay
A review article that details past and present Canadian contributions to neutrinoless double beta decay searches and their theoretical interpretation.
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