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

R. Arnold 1 C. Augier 2 A.S. Barabash A. Basharina-Freshville E. Birdsall S. Blondel 2 M. Bongrand 2 D. Boursette 2 R. Breier V. Brudanin J. Busto 3 S. Calvez 2 C. Cerna 4 J.P. Cesar M. Ceschia A. Chapon 5 E. Chauveau 4 A. Chopra L. Dawson S. de Capua D. Duchesneau 6 D. Durand 5 G. Eurin 2 J.J. Evans D. Filosofov R. Flack P. Franchini C. Girard-Carillo 2 H. Gómez 2 B. Guillon 5 P. Guzowski M. Hoballah 2 R. Hodák M.H. Hussain A. Jeremie 6 S. Jullian 2 J. Kaizer A. Klimenko O. Kochetov S.I. Konovalov V. Kovalenko D. Lalanne 2 K. Lang Y. Lemière 5 T. Le Noblet 6 Z. Liptak 5 X.R. Liu P. Loaiza 2 M. Macko C. Macolino 2 C. Marquet 4 F. Mauger 5 A. Minotti 6 Y. Mora B. Morgan J. Mott I. Nemchenok M. Nomachi F. Nova F. Nowacki 1 H. Ohsumi G. Oliviéro 5 R.B. Pahlka V. Palušová 4 C. Patrick F. Perrot 4 A. Pin 4 F. Piquemal 4 P. Povinec M. Proga W.S. Quinn Y.A. Ramachers A. Remoto 6 J.L. Reyss 7 R. Saakyan A. Salamatin R. Salazar X. Sarazin 2 J. Sedgbeer Yu. Shitov L. Simard 2, 8 F. Šimkovic A. Smolnikov S. Söldner-Rembold I. Štekl J. Suhonen C.S. Sutton G. Szklarz 2 H. Tedjditi 3 J. Thomas V. Timkin S. Torre Vl.I. Tretyak V.I. Tretyak V.I. Umatov C. Vilela V. Vorobel D. Waters F. Xie J. Žemlička
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.
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Submitted on : Thursday, October 7, 2021 - 1:56:31 PM
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R. Arnold, C. Augier, A.S. Barabash, A. Basharina-Freshville, E. Birdsall, et al.. Measurement of the distribution of ^207Bi depositions on calibration sources for SuperNEMO. JINST, 2021, 16 (07), pp.T07012. ⟨10.1088/1748-0221/16/07/T07012⟩. ⟨hal-03197532⟩

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