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Kinast, Angelina; Angloher, G.; Banik, S.; Benato, Giovanni; Bento, A.; Bertolini, Andrea; Breier, R.; Bucci, C.; Burkhart, J.; Canonica, Lucia; D'Addabbo, Antonio; Di Lorenzo, S.; Einfalt, Leonie; Erb, A.; von Feilitzsch, F.; Ferreiro Iachellini, Nahuel; Fichtinger, S.; Fuchs, D.; Fuss, A.; Garai, A.; Ghete, V. M.; Gerster, S.; Gorla, Paolo; Guillaumon, P. V.; [...]

Characterisation of low background CaWO$_4$ crystals for CRESST-III

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  • Media type: E-Article
  • Title: Characterisation of low background CaWO$_4$ crystals for CRESST-III
  • Contributor: Kinast, Angelina; Angloher, G.; Banik, S.; Benato, Giovanni; Bento, A.; Bertolini, Andrea; Breier, R.; Bucci, C.; Burkhart, J.; Canonica, Lucia; D'Addabbo, Antonio; Di Lorenzo, S.; Einfalt, Leonie; Erb, A.; von Feilitzsch, F.; Ferreiro Iachellini, Nahuel; Fichtinger, S.; Fuchs, D.; Fuss, A.; Garai, A.; Ghete, V. M.; Gerster, S.; Gorla, Paolo; Guillaumon, P. V.; [...]
  • imprint: Stichting SciPost, 2023
  • Published in: SciPost Physics Proceedings
  • Language: Not determined
  • DOI: 10.21468/scipostphysproc.12.031
  • ISSN: 2666-4003
  • Keywords: General Medicine ; General Chemistry
  • Origination:
  • Footnote:
  • Description: <jats:p>The CRESST-III experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO<jats:inline-formula><jats:alternatives><jats:tex-math>_4</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi /><mml:mn>4</mml:mn></mml:msub></mml:math></jats:alternatives></jats:inline-formula> target crystal. For many years CaWO<jats:inline-formula><jats:alternatives><jats:tex-math>_4</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi /><mml:mn>4</mml:mn></mml:msub></mml:math></jats:alternatives></jats:inline-formula> crystals have successfully been produced in-house at Technische Universität München with a focus on high radiopurity. To further improve the CaWO<jats:inline-formula><jats:alternatives><jats:tex-math>_4</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi /><mml:mn>4</mml:mn></mml:msub></mml:math></jats:alternatives></jats:inline-formula> crystals, an extensive chemical purification of the raw materials has been performed and the crystal TUM93 was produced from this powder. We present results from an <jats:inline-formula><jats:alternatives><jats:tex-math>\alpha</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math></jats:alternatives></jats:inline-formula>-decay rate analysis performed on 344 days of data collected in the ongoing CRESST-III data-taking campaign. The <jats:inline-formula><jats:alternatives><jats:tex-math>\alpha</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math></jats:alternatives></jats:inline-formula>-decay rate could significantly be reduced.</jats:p>
  • Access State: Open Access