Header

UZH-Logo

Maintenance Infos

New measurement of the relative scintillation efficiency of xenon nuclear recoils below 10 keV


Aprile, E; Baudis, L; Choi, B; Giboni, K L; Lim, K E; Manalaysay, A; Monzani, M E; Plante, G; Santorelli, R; Yamashita, M (2009). New measurement of the relative scintillation efficiency of xenon nuclear recoils below 10 keV. Physical Review C, 79(4):045807.

Abstract

Liquid xenon is an important detection medium in direct dark matter experiments, which search for low-energy nuclear recoils produced by the elastic scattering of WIMPs with quarks. The two existing measurements of the relative scintillation efficiency of nuclear recoils below 20 keV lead to inconsistent extrapolations at lower energies. This results in a different energy scale and thus sensitivity reach of liquid xenon dark matter detectors. We report a new measurement of the relative scintillation efficiency below 10 keV performed with a liquid xenon scintillation detector, optimized for maximum light collection. Greater than 95% of the interior surface of this detector was instrumented with photomultiplier tubes, giving a scintillation yield of 19.6 photoelectrons/keV electron equivalent for 122-keV γ rays. We find that the relative scintillation efficiency for nuclear recoils of 5 keV is 0.14, staying constant around this value up to 10 keV. For higher energy recoils we measure a value of 0.21, consistent with previously reported data. In light of this new measurement, the XENON10 experiment's upper limits on spin-independent WIMP-nucleon cross section, which were calculated assuming a constant 0.19 relative scintillation efficiency, change from 8.8×10-44 cm2 to 9.9×10-44 cm2 for WIMPs of mass 100 GeV/c2, and from 4.5×10-44 cm2 to 5.6×10-44 cm2 for WIMPs of mass 30 GeV/c2.

Abstract

Liquid xenon is an important detection medium in direct dark matter experiments, which search for low-energy nuclear recoils produced by the elastic scattering of WIMPs with quarks. The two existing measurements of the relative scintillation efficiency of nuclear recoils below 20 keV lead to inconsistent extrapolations at lower energies. This results in a different energy scale and thus sensitivity reach of liquid xenon dark matter detectors. We report a new measurement of the relative scintillation efficiency below 10 keV performed with a liquid xenon scintillation detector, optimized for maximum light collection. Greater than 95% of the interior surface of this detector was instrumented with photomultiplier tubes, giving a scintillation yield of 19.6 photoelectrons/keV electron equivalent for 122-keV γ rays. We find that the relative scintillation efficiency for nuclear recoils of 5 keV is 0.14, staying constant around this value up to 10 keV. For higher energy recoils we measure a value of 0.21, consistent with previously reported data. In light of this new measurement, the XENON10 experiment's upper limits on spin-independent WIMP-nucleon cross section, which were calculated assuming a constant 0.19 relative scintillation efficiency, change from 8.8×10-44 cm2 to 9.9×10-44 cm2 for WIMPs of mass 100 GeV/c2, and from 4.5×10-44 cm2 to 5.6×10-44 cm2 for WIMPs of mass 30 GeV/c2.

Statistics

Citations

58 citations in Web of Science®
67 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

73 downloads since deposited on 29 Jan 2010
29 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2009
Deposited On:29 Jan 2010 13:19
Last Modified:05 Apr 2016 13:50
Publisher:American Physical Society
ISSN:0556-2813
Publisher DOI:https://doi.org/10.1103/PhysRevC.79.045807
Related URLs:http://arxiv.org/abs/0810.0274

Download

Preview Icon on Download
Preview
Content: Accepted Version
Filetype: PDF
Size: 1MB
View at publisher

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations