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Title: Searches for double beta decay of Xe 134 with EXO-200

Searches for double beta decay of 134Xe were performed with EXO-200, a single-phase liquid xenon detector designed to search for neutrinoless double beta decay of 136Xe. Using an exposure of 29.6 kg ∙ yr , the lower limits of T$$2νββ\atop{1/2}$$ > 8.7 × 10 20 yr and T$$0νββ\atop{1/2}$$ > 1.1 × 10 23 yr at 90% confidence level were derived, with corresponding half-life sensitivities of 1.2 × 10 21 yr and 1.9 × 10 23 yr . In conclusion, these limits exceed those in the literature for 134 Xe , improving by factors of nearly 10 5 and 2 for the two antineutrino and neutrinoless modes, respectively.
Authors:
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Publication Date:
Report Number(s):
PNNL-SA-131514
Journal ID: ISSN 2470-0010; PRVDAQ; TRN: US1800122
Grant/Contract Number:
AC02-76SF00515; ACI576RL10830
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Contributing Orgs:
EXO-200 Collaboration
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Double beta decay; Nuclear structure & decays; Beta decay
OSTI Identifier:
1410523
Alternate Identifier(s):
OSTI ID: 1408179; OSTI ID: 1430699