Abstract.
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 \( 3.480 \pm 0.001 (stat.) \pm 0.064 (sys.)\) 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.
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Communicated by C. Broggini
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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The data are being stored at the PNNL cluster and all data generated during this study are contained in this published article.]
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Akashi-Ronquest, M., Bacon, A., Benson, C. et al. Triplet lifetime in gaseous argon. Eur. Phys. J. A 55, 176 (2019). https://doi.org/10.1140/epja/i2019-12867-2
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DOI: https://doi.org/10.1140/epja/i2019-12867-2