Measurement of radon-induced backgrounds in the NEXT double beta decay experiment

The NEXT collaboration

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Abstract

The measurement of the internal 222Rn activity in the NEXT-White detector during the so-called Run-II period with 136Xe-depleted xenon is discussed in detail, together with its implications for double beta decay searches in NEXT. The activity is measured through the alpha production rate induced in the fiducial volume by 222Rn and its alpha-emitting progeny. The specific activity is measured to be (38.1 ± 2.2 (stat.) ± 5.9 (syst.)) mBq/m3. Radon-induced electrons have also been characterized from the decay of the 214Bi daughter ions plating out on the cathode of the time projection chamber. From our studies, we conclude that radon-induced backgrounds are sufficiently low to enable a successful NEXT-100 physics program, as the projected rate contribution should not exceed 0.1 counts/yr in the neutrinoless double beta decay sample.[Figure not available: see fulltext.]

Original languageEnglish (US)
Article number112
JournalJournal of High Energy Physics
Volume2018
Issue number10
DOIs
StatePublished - Oct 1 2018

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Keywords

  • Dark Matter and Double Beta Decay (experiments)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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