B3 Non-refereed conference proceedings
High-multiplicity neutron events registered by NEMESIS experiment (2021)

Kasztelan Marcin, Enqvist, T., Jędrzejczak, K., Joutsenvaara, J., Kotavaara, O., Kuusiniemi, P., Loo, K.K., Orzechowski, J., Puputti, J., Sobkow, A., Słupecki, M., Szabelski, J., Usoskin, I., Trzaska, W.H., Ward, T.E. (2021). High-multiplicity neutron events registered by NEMESIS experiment. In ICRC 2021 : 37th International Cosmic Ray Conference (pp. 1-8). Sissa. POS Proceedings of Science, 497. https://doi.org/10.22323/1.395.0497

JYU authors or editors

Publication details

All authors or editors: Kasztelan Marcin; Enqvist, T.; Jędrzejczak, K.; Joutsenvaara, J.; Kotavaara, O.; Kuusiniemi, P.; Loo, K.K.; Orzechowski, J.; Puputti, J.; Sobkow, A.; et al.

Parent publication: ICRC 2021 : 37th International Cosmic Ray Conference

Place and date of conference: Online – Berlin, Germany, 12.-23.7.2021

Journal or series: POS Proceedings of Science

eISSN: 1824-8039

Publication year: 2021

Number in series: 497

Pages range: 1-8

Publisher: Sissa

Publication country: Italy

Publication language: English

DOI: https://doi.org/10.22323/1.395.0497

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/79687

Abstract

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 one MeV, 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.

Keywords: physics; neutrons; particle physics; nuclear physics; radioactive radiation

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2021