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Measurement of the distribution of ^207Bi depositions on calibration sources for SuperNEMO

Arnold, R; Augier, C; Barabash, AS; Basharina-Freshville, A; Birdsall, E; Blondel, S; Bongrand, M; ... Žemlička, J; + view all (2021) Measurement of the distribution of ^207Bi depositions on calibration sources for SuperNEMO. Journal of Instrumentation , 16 (7) , Article T07012. 10.1088/1748-0221/16/07/T07012. Green open access

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Abstract

The SuperNEMO experiment will search for neutrinoless double-beta decay (0νββ), and study the Standard-Model double-beta decay process (2νββ). The SuperNEMO technology can measure the energy of each of the electrons produced in a double-beta (ββ) decay, and can reconstruct the topology of their individual tracks. The study of the double-beta decay spectrum requires very accurate energy calibration to be carried out periodically. The SuperNEMO Demonstrator Module will be calibrated using 42 calibration sources, each consisting of a droplet of 207Bi within a frame assembly. The quality of these sources, which depends upon the entire ^207Bi droplet being contained within the frame, is key for correctly calibrating SuperNEMO's energy response. In this paper, we present a novel method for precisely measuring the exact geometry of the deposition of 207Bi droplets within the frames, using Timepix pixel detectors. We studied 49 different sources and selected 42 high-quality sources with the most central source positioning.

Type: Article
Title: Measurement of the distribution of ^207Bi depositions on calibration sources for SuperNEMO
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1748-0221/16/07/T07012
Publisher version: https://doi.org/10.1088/1748-0221/16/07/T07012
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10135270
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