Extended Data Fig. 2: Time-resolved photon counting of 619-nm fluorescence.
From: Imaging individual barium atoms in solid xenon for barium tagging in nEXO
Histograms showing the decay of the 619-nm fluorescence for barium in SXe (blue), SXe-only (green) and the cryoprobe tube (red). The decay lifetime of the barium fluorescence is 7.0 ± 0.3 ns. The SXe-only and cryoprobe emissions have shorter decay lifetimes of approximately 3 ns and 1.5 ns respectively.
