A laser-based barium tagging scheme using Ba+ fluorescence could make 136Xe double beta decay searches nearly background-free without molecular additives.
It is plausible to consider that barium ions may appear after the disintegration of xenon in the ground state
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Background reduction in $^{136}$Xe double beta decay experiments through direct barium ion detection
A laser-based barium tagging scheme using Ba+ fluorescence could make 136Xe double beta decay searches nearly background-free without molecular additives.