A83Krmsource for use in low-background liquid Xenon time projection chambers

We report the testing of a charcoal-based 83 Kr m source for use in calibrating a low-background two-phase liquid xenon detector. 83 Kr m atoms produced through the decay of 83 Rb are introduced into a xenon detector by flowing xenon gas past the 83 Rb source. 9.4 keV and 32.1 keV transitions from decaying 83 Kr m nuclei are detected through liquid xenon scintillation and ionization. The characteristics of the 83 Kr m source are analyzed and shown to be appropriate for a low background liquid xenon detector. Introduction of 83 Kr m allows for quick, periodic calibration of low background noble liquid detectors at low energy.