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 ± 0.001 (stat.) ± 0.064 (sys.) μs 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.
Cite
@article{arxiv.1903.06706,
title = {Triplet Lifetime in Gaseous Argon},
author = {Michael Akashi-Ronquest and Amanda Bacon and Christopher Benson and Kolahal Bhattacharya and Thomas Caldwell and Joseph A. Formaggio and Dan Gastler and Brianna Grado-White and Jeff Griego and Michael Gold and Andrew Hime and Christopher M. Jackson and Stephen Jaditz and Chris Kachulis and Edward Kearns and Joshua R. Klein and Antonio Ledesma and Steve Linden and Frank Lopez and Sean MacMullin and Andrew Mastbaum and Jocelyn Monroe and James Nikkel and John Oertel and Gabriel D. Orebi Gann and Gabriel S. Ortega and Kimberley Palladino and Keith Rielage and Stanley R. Seibert and Jui-Jen Wang},
journal= {arXiv preprint arXiv:1903.06706},
year = {2019}
}