## arXiv Analytics

### arXiv:1306.6106 [nucl-ex]AbstractReferencesReviewsResources

#### An improved measurement of the 2νββ half-life of Xe-136 with EXO-200

Published 2013-06-25, updated 2014-01-29Version 4

We report on an improved measurement of the 2\nu \beta \beta\ half-life of Xe-136 performed by EXO-200. The use of a large and homogeneous time projection chamber allows for the precise estimate of the fiducial mass used for the measurement, resulting in a small systematic uncertainty. We also discuss in detail the data analysis methods used for double-beta decay searches with EXO-200, while emphasizing those directly related to the present measurement. The Xe-136 2\nu \beta \beta\ half-life is found to be 2.165 +- 0.016 (stat) +- 0.059 (sys) x 10^21 years. This is the most precisely measured half-life of any 2\nu \beta \beta\ decay to date.

Comments: 34 pages, 32 figures, Updated to published version
Journal: Phys. Rev. C 89, 015502 (2014)
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