Fluorescence imaging of individual ions and molecules in pressurized noble gases for barium tagging in 136^{136}Xe

Collaboration
May 20, 2024
13 pages
Published in:
  • Nature Commun. 15 (2024) 1, 10595
  • Published: Dec 5, 2024
e-Print:
Report number:
  • FERMILAB-PUB-24-0802-PPD

Citations per year

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Abstract: (Springer)
The imaging of individual Ba2+^{2+} ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba2+^{2+} ion imaging inside a high-pressure xenon gas environment. Ba2+^{2+} ions chelated with molecular chemosensors are resolved at the gas-solid interface using a diffraction-limited imaging system with scan area of 1 × 1 cm2^{2} located inside 10 bar of xenon gas. This form of microscopy represents key ingredient in the development of barium tagging for neutrinoless double beta decay searches in 136^{136}Xe. This also provides a new tool for studying the photophysics of fluorescent molecules and chemosensors at the solid-gas interface to enable bottom-up design of catalysts and sensors.