Calibration of liquid argon and neon detectors with ${}^{83}K{r}^m$

Abstract

We report results from tests of ${}^{83}$Kr${}^{\mathrm{m}}$, as a calibration source in liquid argon and liquid neon. ${}^{83}$Kr${}^{\mathrm{m}}$ atoms are produced in the decay of ${}^{83}$Rb, and a clear ${}^{83}$Kr${}^{\mathrm{m}}$ scintillation peak at 41.5 keV appears in both liquids when filling our detector through a piece of zeolite coated with ${}^{83}$Rb. Based on this scintillation peak, we observe 6.0 photoelectrons/keV in liquid argon with a resolution of 6% ($\sigma$/E) and 3.0 photoelectrons/keV in liquid neon with a resolution of 19% ($\sigma$/E). The observed peak intensity subsequently decays with the ${}^{83}$Kr${}^{\mathrm{m}}$ half-life after stopping the fill, and we find evidence that the spatial location of ${}^{83}$Kr${}^{\mathrm{m}}$ atoms in the chamber can be resolved. ${}^{83}$Kr${}^{\mathrm{m}}$ will be a useful calibration source for liquid argon and neon dark matter and solar neutrino detectors.

7 pages, 12 figures

References in corpus (4)

• Results from the First Science Run of the ZEPLIN-III Dark Matter Search Experiment
• Calibration of a Liquid Xenon Detector with Kr-83m
• Scintillation of liquid neon from electronic and nuclear recoils
• Preparation of Neutron-activated Xenon for Liquid Xenon Detector Calibration

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• Simulation of argon response and light detection in the DarkSide-50 dual phase TPC
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• Design and construction of a new detector to measure ultra-low radioactive-isotope contamination of argon
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