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Search for two-neutrino double electron capture of Xe-124 with XENON100
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Number of Authors: 116
2017 (English)In: Physical Review C, ISSN 2469-9985, Vol. 95, no 2, 024605Article in journal (Refereed) Published
Abstract [en]

Two-neutrino double electron capture is a rare nuclear decay where two electrons are simultaneously captured from the atomic shell. For Xe-124 this process has not yet been observed and its detection would provide a new reference for nuclear matrix element calculations. We have conducted a search for two-neutrino double electron capture from the K shell of 124Xe using 7636 kg d of data from the XENON100 dark matter detector. Using a Bayesian analysis we observed no significant excess above background, leading to a lower 90% credibility limit on the half-life T-1/2 > 6.5 x 10(20) yr. We have also evaluated the sensitivity of the XENON1T experiment, which is currently being commissioned, and found a sensitivity of T-1/2 > 6.1 x 10(22) yr after an exposure of 2 t yr.

Place, publisher, year, edition, pages
2017. Vol. 95, no 2, 024605
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-141422DOI: 10.1103/PhysRevC.95.024605ISI: 000393744200001OAI: oai:DiVA.org:su-141422DiVA: diva2:1087034
Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2017-04-05Bibliographically approved

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Bauermeister, BorisCalvén, JakobConrad, JanFerella, Alfredo D.Pelssers, Bart
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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