Characterisation of low background CaWO$_4$ crystals for CRESST-III
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Published:2023-07-04
Issue:12
Volume:
Page:
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ISSN:2666-4003
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Container-title:SciPost Physics Proceedings
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language:
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Short-container-title:SciPost Phys. Proc.
Author:
Kinast Angelina1, Angloher G.2, Banik S.34, Benato Giovanni5, Bento A.26, Bertolini Andrea2, Breier R.7, Bucci C.5, Burkhart J.4, Canonica Lucia2, D'Addabbo Antonio5, Di Lorenzo S.5, Einfalt Leonie34, Erb A.18, von Feilitzsch F.1, Ferreiro Iachellini Nahuel2, Fichtinger S.4, Fuchs D.2, Fuss A.34, Garai A.2, Ghete V. M.4, Gerster S.9, Gorla Paolo5, Guillaumon P. V.5, Gupta S.4, Hauff D.2, Ješkovský Miroslav7, Jochum Josef9, Kaznacheeva Margarita1, Kluck Holger4, Kraus H.10, Langenkämper Alexander21, Mancuso M.2, Marini Laura511, Meyer L.9, Mokina Valentyna4, Nilima A.2, Olmi M.5, Ortmann T.1, Pagliarone C.512, Pattavina Luca15, Petricca Federica2, Potzel Walter1, Povinec P.7, Pröbst F.2, Pucci F.2, Reindl Florian34, Rothe J.1, Schäffner K.2, Schieck J.34, Schmiedmayer D.34, Schönert S.1, Schwertner C.34, Stahlberg Martin2, Stodolsky L.2, Strandhagen C.9, Strauss R.1, Usherov I.9, Wagner F.4, Willers Michael1, Zema Vanessa2
Affiliation:
1. Technical University of Munich 2. Max Planck Institute for Physics 3. Atominstitut 4. Austrian Academy of Sciences 5. Gran Sasso National Laboratory 6. University of Coimbra 7. Comenius University Bratislava 8. Walther-Meißner-Institut 9. University of Tübingen 10. University of Oxford 11. Gran Sasso Science Institute 12. University of Cassino and Southern Lazio
Abstract
The CRESST-III experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO_44 target crystal. For many years CaWO_44 crystals have successfully been produced in-house at Technische Universität München with a focus on high radiopurity. To further improve the CaWO_44 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 \alphaα-decay rate analysis performed on 344 days of data collected in the ongoing CRESST-III data-taking campaign. The \alphaα-decay rate could significantly be reduced.
Funder
Agentúra na Podporu Výskumu a Vývoja Austrian Science Fund Bundesministerium für Bildung und Forschung Deutsche Forschungsgemeinschaft Österreichische Forschungsförderungsgesellschaft
Publisher
Stichting SciPost
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