University of Oulu

Kasztelan, M., Enqvist, T., Jędrzejczak, K., Joutsenvaara, J., Kotavaara, O., Kuusiniemi, P., Loo, K., Orzechowski, J., Puputti, J., Sobkow, A., Słupecki, M., Szabelski, J., Usoskin, I., Trzaska, W., Ward, T. (2021) High-multiplicity neutron events registered by NEMESIS experiment. Proceedings of 37th International Cosmic Ray Conference (ICRC2021), 395, 497.

High-multiplicity neutron events registered by NEMESIS experiment

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Author: Kasztelan, M.1; Enqvist, T.2; Jędrzejczak, K.1;
Organizations: 1National Centre for Nuclear Research, 28 Pułku Strzelców Kaniowskich 69, Łódz, Poland
2Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
3University of Oulu, Kerttu Saalasti Institute, Pajatie 5, 85500 Nivala, Finland
4Institut für Physik (IPH), Johannes Gutenberg-Universität Mainz (JGU), Staudingerweg 7, 55128 Mainz,Germany
5Helsinki Institute of Physics (HIP), P.O. Box 64, 00014 University of Helsinki, Finland
6University of Oulu, Sodankyla Geophysical Observatory, P.O. Box 3000, FIN-99600 Sodankyla, Finland
7High Energy Physics (HEP), U.S. Department of Energy, SC-25/Germantown Building, 1000 Independence Ave., SW, Washington, D.C., 20585, United States
8TechSource, Santa Fe, NM, United States
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 8.2 MB)
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Language: English
Published: Sissa, 2021
Publish Date: 2021-11-22


Neutron-induced interactions contribute to the signal-mimicking background in deep-underground searches for exotic phenomena such as Dark Matter, neutrino-less double beta decay, proton decay, etc. Apart from radioactive decay, the primary source of neutrons underground are high-energy muons from cosmic showers. While the maximum number of fission neutrons is around six and energies around oneMeV, muon-induced interactions may generate hundreds of neutrons, also with high energies. Furthermore, these processes are not yet reproduced in numerical simulations with sufficient reliability. The main goal of the NEMESIS experiment is to improve our knowledge and understanding of cosmic muon-induced neutron production in high-Z targets. NEMESIS (New Emma MEasurementS Including neutronS) is taking data at a depth of 210 m.w.e. in Callio Lab in the Pyhäsalmi mine, Finland.

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Series: POS. Proceedings of science
ISSN: 1824-8039
ISSN-E: 1824-8039
ISSN-L: 1824-8039
Issue: 395
Article number: 497
DOI: 10.22323/1.395.0497
Host publication: Proceedings of 37th International Cosmic Ray Conference (ICRC2021)
Conference: International Cosmic Ray Conference
Type of Publication: B3 Article in conference proceedings
Field of Science: 115 Astronomy and space science
Funding: This work was financially supported in part by the EU (INTERREG for Baltic Sea programme) as part of the BSUIN project, and by the Polish Ministry of Science and Higher Education (grant no. 3988/INTERREG BSR/2018/2).
Copyright information: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).