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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents

ID: 544282.0, MPI für Physik / MPI für Physik
Electron and Gamma Background in CRESST Detectors
Authors:Lang, R. F.; Angloher, G.; Bauer, M.; Bavykina, I.; Bento, A.; Brown, A.; Bucci, C.; Ciemniak, C.; Coppi, C.; Deuter, G.; von Feilitzsch, F.; Hauff, D.; Henry, S.; Huff, P.; Imber, J.; Ingleby, S.; Isaila, C.; Jochum, J.; Kiefer, M.; Kimmerle, M.; Kraus, H.; Lanfranchi, J. -C.; Majorovits, B.; Malek, M.; McGowan, R.; Mikhailik, V. B.; Pantic, E.; Petricca, F.; Pfister, S.; Potzel, W.; Pröbst, F.; Roth, S.; Rottler, K.; Sailer, C.; Schäffner, K.; Schmaler, J.; Scholl, S.; Seidel, W.; Stodolsky, L.; Tolhurst, A. J. B.; Usherov, I.; Westphal, W.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Astroparticle Physics
Journal Abbrev.:Astropart.Phys.
Issue / Number:32
Start Page:318
End Page:324
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The CRESST experiment monitors 300g CaWO_4 crystals as targets for particle interactions in an ultra low background environment. In this paper, we analyze the background spectra that are recorded by three detectors over many weeks of data taking. Understanding these spectra is mandatory if one wants to further reduce the background level, and allows us to cross-check the calibration of the detectors. We identify a variety of sources, such as intrinsic contaminations due to primordial radioisotopes and cosmogenic activation of the target material. In particular, we detect a 3.6keV X-ray line from the decay of 41-Ca with an activity of (26\pm4)\mu Bq, corresponding to a ratio 41-Ca/40-Ca=(2.2\pm0.3)\times10^{-16}.
Classification / Thesaurus:CRESST
Comment of the Author/Creator:7 pages, 12 figures
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
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