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Title: Measurement of Radon-Induced Backgrounds in the NEXT Double Beta Decay Experiment

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 $$(37.5\pm 2.3~\mathrm{(stat.)}\pm 5.9~\mathrm{(syst.)})$$~mBq/m$^3$. 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 0.2~counts/yr in the neutrinoless double beta decay sample.

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
NEXT
OSTI Identifier:
1437298
Report Number(s):
FERMILAB-PUB-18-093-CD-ND; arXiv:1804.00471
1665520
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Novella, P., and et al. Measurement of Radon-Induced Backgrounds in the NEXT Double Beta Decay Experiment. United States: N. p., 2018. Web.
Novella, P., & et al. Measurement of Radon-Induced Backgrounds in the NEXT Double Beta Decay Experiment. United States.
Novella, P., and et al. Mon . "Measurement of Radon-Induced Backgrounds in the NEXT Double Beta Decay Experiment". United States. doi:. https://www.osti.gov/servlets/purl/1437298.
@article{osti_1437298,
title = {Measurement of Radon-Induced Backgrounds in the NEXT Double Beta Decay Experiment},
author = {Novella, P. and et al.},
abstractNote = {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 $(37.5\pm 2.3~\mathrm{(stat.)}\pm 5.9~\mathrm{(syst.)})$~mBq/m$^3$. 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 0.2~counts/yr in the neutrinoless double beta decay sample.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 02 00:00:00 EDT 2018},
month = {Mon Apr 02 00:00:00 EDT 2018}
}