A precise measurement of the radio-purity levels of the CaWO4 crystals used for both the CRESST and the NUCLEUS experiment, is fundamental for a better background understanding. The sensitivity of HPGe detectors is not sufficient to the excellent radio-purity levels of the CaWO4 crystals produced in-house at the Technische Universitat München (TUM). We report on a cryogenic α-screening facility which will provide a method to determine the radio-purity of this crystals by measuring the alpha-decays with a high precision, taking advantage of the unique experimental environment of the shallow underground laboratory (UGL) of the TUM.
Kinast, A., Mondragon, E., Erb, A., Langenkamper, A., Kaznacheeva, M., Ortmann, T., et al. (2020). Development of a cryogenic alpha-screening facility at the shallow underground laboratory at TUM. In 16th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2019. Institute of Physics Publishing [10.1088/1742-6596/1468/1/012248].
Development of a cryogenic alpha-screening facility at the shallow underground laboratory at TUM
Pattavina L.;
2020
Abstract
A precise measurement of the radio-purity levels of the CaWO4 crystals used for both the CRESST and the NUCLEUS experiment, is fundamental for a better background understanding. The sensitivity of HPGe detectors is not sufficient to the excellent radio-purity levels of the CaWO4 crystals produced in-house at the Technische Universitat München (TUM). We report on a cryogenic α-screening facility which will provide a method to determine the radio-purity of this crystals by measuring the alpha-decays with a high precision, taking advantage of the unique experimental environment of the shallow underground laboratory (UGL) of the TUM.
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