Measurement Of The Distribution Of Bi-207 Depositions On Calibration Sources For Supernemo

R. Arnold, C. Augier,A. S. Barabash, A. Basharina-Freshville, E. Birdsall, S. Blondel,M. Bongrand,D. Boursette,R. Breier,V. Brudanin, J. Busto, S. Calvez,C. Cerna,J. P. Cesar, M. Ceschia,A. Chapon,E. Chauveau,A. Chopra,L. Dawson,S. De Capua,D. Duchesneau,D. Durand,G. Eurin,J. J. Evans,D. Filosofov, R. Flack,P. Franchini,C. Girard-Carillo,H. Gómez, B. Guillon,P. Guzowski, M. Hoballah,R. Hodák, M. H. Hussain,A. Jeremie,S. Jullian,J. Kaizer,A. Klimenko, O. Kochetov,S. I. Konovalov,V. Kovalenko,D. Lalanne, K. Lang,Y. Lemière,T. Le Noblet,Z. Liptak,X. R. Liu,P. Loaiza,M. Macko, C. Macolino,C. Marquet, F. Mauger,A. Minotti, Y. Mora,B. Morgan,J. Mott, I. Nemchenok, M. Nomachi,F. Nova,F. Nowacki, H. Ohsumi,G. Oliviéro,R. B. Pahlka,V. Palušová,C. Patrick,F. Perrot,A. Pin,F. Piquemal,P. Povinec, M. Proga, W. S. Quinn,Y. A. Ramachers,A. Remoto,J. L. Reyss, R. Saakyan,A. Salamatin,R. Salazar, X. Sarazin,J. Sedgbeer,Yu. Shitov, L. Simard,F. Šimkovic,A. Smolnikov, S. Söldner-Rembold,I. Štekl, J. Suhonen,C. S. Sutton, G. Szklarz,H. Tedjditi,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

JOURNAL OF INSTRUMENTATION（2021）

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摘要

The SuperNEMO experiment will search for neutrinoless double-beta decay (0 upsilon beta beta), and study the Standard-Model double-beta decay process (2 upsilon beta beta). The SuperNEMO technology can measure the energy of each of the electrons produced in a double-beta (beta beta) 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 Bi-207 within a frame assembly.The quality of these sources, which depends upon the entire Bi-207 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 Bi-207 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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关键词

Detector alignment and calibration methods (lasers, sources, particle-beams), Double-beta decay detectors

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