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ID: 544276.0, MPI für Physik / MPI für Physik
Discrimination of Recoil Backgrounds in Scintillating Calorimeters
Authors:
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Astroparticle Physics
Journal Abbrev.:Astropart.Phys.
Issue / Number:33
Start Page:60
End Page:64
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The alpha decay of $\n{{}^{210}Po}$ is a dangerous background to rare event searches. Here, we describe observations related to this alpha decay in the Cryogenic Rare Event Search with Superconducting Thermometers (CRESST). We find that lead nuclei show a scintillation light yield in our $\n{CaWO_4}$ crystals of $0.0142\pm0.0013$ relative to electrons of the same energy. We describe a way to discriminate this source of nuclear recoil background by means of a scintillating foil, and demonstrate its effectiveness. This leads to an observable difference in the pulse shape of the light detector, which can be used to tag these events. Differences in pulse shape of the phonon detector between lead and electron recoils are also extracted, opening the window to future additional background suppression techniques based on pulse shape discrimination in such experiments.
Classification / Thesaurus:CRESST
Comment of the Author/Creator:5 pages, 9 figures
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:
Identifiers:
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