A two-phase argon detector is being developed in our laboratory for dark matter search and low-energy neutrino experiments. A 109Cd γ-ray source was used to calibrate the energy scale of the detector. In this paper, a detailed emission spectrum of the 109Cd source was measured using a YAP:Ce based scintillation detector and high-purity germanium detector. It was shown that the 109Cd source equipped with a tungsten substrate and a copper filter can provide a complete set of γ-ray lines in the range from 8 to 90 keV for energy calibration of two-phase detectors. These measurements allowed us to successfully quantify the shape of the amplitude spectrum observed when the two-phase detector was irradiated by the 109Cd source.
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ACKNOWLEDGMENTS
Part of this work, related to the measurement of the 109Cd emission spectrum by means of the HPGe detector, was done using the infrastructure of the Shared-Use Center “Siberian Synchrotron and Terahertz Radiation Center (SSTRC)” based on “Complex VEPP-4–VEPP-2000”.
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Bondar, A.E., Buzulutskov, A.F., Dolgov, A.D. et al. Characterization of a 109Cd γ-Ray Source for the Two-Phase Argon Detector. Instrum Exp Tech 62, 746–749 (2019). https://doi.org/10.1134/S0020441219050142
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DOI: https://doi.org/10.1134/S0020441219050142