PoS - Proceedings of Science
Volume 441 - XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP2023) - Dark Matter and its Detection
$^{17}$O enrichment of CaWO$_4$ crystals for spin-dependent DM search
A. Kinast*, A. Erb, S. Schönert, R. Strauss and J. Haase
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Pre-published on: February 04, 2024
Published on: March 22, 2024
For many years, various experiments have attempted to shed light on the nature of dark matter (DM). This work investigates the possibility of using CaWO$_4$ crystals for the direct search of spin-dependent DM interactions using the isotope $^{17}$O with a nuclear spin of 5/2. Due to the low natural abundance of 0.038$\%$, an enrichment of the CaWO$_4$ crystals with $^{17}$O is developed during the crystal production process at the Technical University of Munich. Three CaWO$_4$ crystals were enriched, and their $^{17}$O content was measured by nuclear magnetic resonance spectroscopy at the University of Leipzig. This paper presents the concept and first results of the $^{17}$O enrichment and discusses the possibility of using enriched crystals to increase the sensitivity for the spin-dependent DM search with CRESST.
DOI: https://doi.org/10.22323/1.441.0091
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