Triplet Lifetime in Gaseous Argon

15 Mar 2019 · Michael Akashi-Ronquest, Amanda Bacon, Christopher Benson, Kolahal Bhattacharya, Thomas Caldwell, Joseph A. Formaggio, Dan Gastler, Brianna Grado-White, Jeff Griego, Michael Gold, Andrew Hime, Christopher M. Jackson, Stephen Jaditz, Chris Kachulis, Edward Kearns, Joshua R. Klein, Antonio Ledesma, Steve Linden, Frank Lopez, Sean MacMullin, Andrew Mastbaum, Jocelyn Monroe, James Nikkel, John Oertel, Gabriel D. Orebi Gann, Gabriel S. Ortega, Kimberley Palladino, Keith Rielage, Stanley R. Seibert, Jui-Jen Wang ·

MiniCLEAN is a single-phase liquid argon dark matter experiment. During the initial cooling phase, impurities within the cold gas ($<$140 K) were monitored by measuring the scintillation light triplet lifetime, and ultimately a triplet lifetime of 3.480 $\pm$ 0.001 (stat.) $\pm$ 0.064 (sys.) $\mu$s was obtained, indicating ultra-pure argon. This is the longest argon triplet time constant ever reported. The effect of quenching of separate components of the scintillation light is also investigated.

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Triplet Lifetime in Gaseous Argon

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