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Single Molecule Fluorescence Imaging as a Technique for Barium Tagging in Neutrinoless Double Beta Decay | | B. J. P. Jones
; A. D. McDonald
; D. R. Nygren
; | | Date: |
13 Sep 2016 | | Abstract: | Background rejection is key to success for future neutrinoless double beta
decay experiments. To achieve sensitivity to effective Majorana lifetimes of
$sim10^{28}$ years, backgrounds must be controlled to better than 0.1 count
per ton per year, beyond the reach of any present technology. In this paper we
propose a new method to identify the birth of the barium daughter ion in the
neutrinoless double beta decay of $^{136}$Xe. The method adapts Single Molecule
Fluorescent Imaging, a technique from biochemistry research with demonstrated
single ion sensitivity. We explore possible SMFI dyes suitable for the problem
of barium ion detection in high pressure xenon gas, and develop a fiber-coupled
sensing system with which we can detect the presence of bulk Ba$^{++}$ ions
remotely. We show that our sensor produces signal-to-background ratios as high
as 85 in response to Ba$^{++}$ ions when operated in aqueous solution. We then
describe the next stage of this R&D program, which will be to demonstrate
chelation and fluorescence in xenon gas. If a successful barium ion tag can be
developed using SMFI adapted for high pressure xenon gas detectors, the first
essentially zero background, ton-scale neutrinoless double beta decay
technology could be realized. | | Source: | arXiv, 1609.4019 | | Services: | Forum | Review | PDF | Favorites | |
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