We report results from tests of 83Krm, as a calibration source in liquid argon and liquid neon. 83Krm atoms are produced in the decay of 83Rb, and a clear 83Krm scintillation peak at 41.5 keV appears in both liquids when filling our detector through a piece of zeolite coated with 83Rb. Based on this scintillation peak, we observe 6.0 photoelectrons/keV in liquid argon with a resolution of 6% (σ/E) and 3.0 photoelectrons/keV in liquid neon with a resolution of 19% (σ/E). The observed peak intensity subsequently decays with the 83Krm half-life after stopping the fill, and we find evidence that the spatial location of 83Krm atoms in the chamber can be resolved. 83Krm will be a useful calibration source for liquid argon and neon dark matter and solar neutrino detectors.
@article{arxiv.0911.5453,
title = {Calibration of liquid argon and neon detectors with $^{83}Kr^m$},
author = {W. H. Lippincott and S. B. Cahn and D. Gastler and L. W. Kastens and E. Kearns and D. N. McKinsey and J. A. Nikkel},
journal= {arXiv preprint arXiv:0911.5453},
year = {2010}
}