Radon background in liquid xenon detectors

Rupp, N.

doi:10.1088/1748-0221/13/02/c02001

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…1 H NMRs were acquired on 300 MHz and 500 MHz spectrometers and referenced to the internal solvent signals (7.26 ppm in CDCl 3 or 3.33 ppm in CD 3 OD). 13 C NMRs were acquired on 75 MHz and 125 MHz spectrometers referenced to the internal solvent signals (central peak 77.00 ppm in CDCl 3 or 45.00 ppm in CD 3 OD). NMR data are reported as follows: chemical shift (in ppm, δ ), integration, multiplicity (s = singlet, d = doublet, t = triplet, q = quartet, m = multiplet, br = broad), coupling constant (in Hz).…”

Section: Methodsmentioning

confidence: 99%

“…Well-motivated theoretical models involving light neutrino exchange predict that 0νβ β could be observed with any lifetime beyond this limit [8][9][10] , given present knowledge of neutrino masses and mixing angles. Observing such a rare process above experimental background from sources such as detector material gamma rays 11 , dissolved radioisotopes 12,13 , neutron captures 14 , and others is a formidable experimental challenge, requiring deep underground detectors, exquisite radio-purity [15][16][17] , and extremely selective signal identification and background rejection methods.…”

Section: Introductionmentioning

confidence: 99%

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Barium Chemosensors with Dry-Phase Fluorescence for Neutrinoless Double Beta Decay

Thapa

Arnquist

Byrnes

et al. 2019

Sci Rep

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The nature of the neutrino is one of the major open questions in experimental nuclear and particle physics. The most sensitive known method to establish the Majorana nature of the neutrino is detection of the ultra-rare process of neutrinoless double beta decay. However, identification of one or a handful of decay events within a large mass of candidate isotope, without obfuscation by backgrounds is a formidable experimental challenge. One hypothetical method for achieving ultra- low-background neutrinoless double beta decay sensitivity is the detection of single 136Ba ions produced in the decay of 136Xe (“barium tagging”). To implement such a method, a single-ion-sensitive barium detector must be developed and demonstrated in bulk liquid or dry gaseous xenon. This paper reports on the development of two families of dry-phase barium chemosensor molecules for use in high pressure xenon gas detectors, synthesized specifically for this purpose. One particularly promising candidate, an anthracene substituted aza-18-crown-6 ether, is shown to respond in the dry phase with almost no intrinsic background from the unchelated state, and to be amenable to barium sensing through fluorescence microscopy. This interdisciplinary advance, paired with earlier work demonstrating sensitivity to single barium ions in solution, opens a new path toward single ion detection in high pressure xenon gas.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Barium Chemosensors with Dry-Phase Fluorescence for Neutrinoless Double Beta Decay

Thapa

Arnquist

Byrnes

et al. 2019

Sci Rep

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“…Radon can be removed from gases (including air) using purification columns filled with adsorbers, such as charcoal, typically operated at cryogenic temperatures [4,5]. Radon can also be removed via nitrogen gas stripping [4,6] or via liquid distillation [7]. Because of these reasons, radio-assay measurements of detector components via gamma-ray spectroscopy or mass spectrometry techniques prior to detector installation are of limited use to constrain radon-induced backgrounds.…”

Section: Introductionmentioning

confidence: 99%

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

Novella¹,

Palmeiro²,

Simón³

et al. 2018

J. High Energ. Phys.

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The measurement of the internal 222 Rn activity in the NEXT-White detector during the so-called Run-II period with 136 Xe-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 222 Rn and its alpha-emitting progeny. The specific activity is measured to be (38.1 ± 2.2 (stat.) ± 5.9 (syst.)) mBq/m 3. Radon-induced electrons have also been characterized from the decay of the 214 Bi 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.

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Study on the radon adsorption capability of low-background activated carbon

Li,

Zhang,

et al. 2023

J Radioanal Nucl Chem

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Radon background in liquid xenon detectors

Cited by 6 publications

References 20 publications

Barium Chemosensors with Dry-Phase Fluorescence for Neutrinoless Double Beta Decay

Barium Chemosensors with Dry-Phase Fluorescence for Neutrinoless Double Beta Decay

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

Study on the radon adsorption capability of low-background activated carbon

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