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

作者：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. Cesar, M. Ceschia, A. Chapon, E. Chauveau, A. Chopra, L. Dawson, S. De Capua, D. Duchesneau, D. Durand, G. Eurin, J. Evans, D. Filosofov, R. Flack, P. Franchini, C. Girard-Carillo, H. Gomez, B. Guillon, P. Guzowski, M. Hoballah, R. Hodak, M. Hussain, A. Jeremie, S. Jullian, J. Kaizer, A. Klimenko, O. Kochetov, S. 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. Oliviero, R. Pahlka, V. Palušová, C. Patrick, F. Perrot, A. Pin, F. Piquemal, P. Povinec, M. Proga, W. S. Quinn, Y. Ramachers, A. Remoto, J. Reyss, R. Saakyan, A. Salamatin, R. Salazar, X. Sarazin, J. Sedgbeer, Y. Shitov, L. Simard, F. Šimkovic, A. Smolnikov, S. Söldner-Rembold, I. Stekl, J. Suhonen, C. Sutton, G. Szklarz, H. Tedjditi, J. Thomas, V. Timkin, S. Torre, V. Tretyak, V. Tretyak, V. I. Umatov, C. Vilela, V. Vorobel, D. Waters, F. Xie, J. Žemlička · 发表于：Journal of Instrumentation · 年份：2021 · DOI：10.1088/1748-0221/16/07/t07012 · 被引用次数：7 · 研究领域：Physics

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.