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• W1978442074 abstract "Ultralow-background experiments, such as neutrinoless double-ensuremath{beta} decay, solar neutrino, and dark-matter searches, are carried out deep underground to escape background events created by cosmic-ray muons passing through the detector volumes. However, such experiments may nevertheless be limited in sensitivity by cosmogenically induced backgrounds. This limit can be attributable to cosmogenically created radioactive isotopes produced either in situ during operation or prior to construction when the detector construction materials are above ground. An accurate knowledge of the production of the latter source of background is of paramount importance to be able to interpret the results of low-background experiments. One way to deal with the characterization of cosmogenic background production is to use Monte Carlo simulations to model the spallation reactions arising from cosmic-ray neutrons, protons, and muons. The objective of this work was to evaluate the degree of accuracy that such simulations could provide by comparing measurements for various materials to results from two standard Monte Carlo codes using the same physics model for generating intranuclear cascades. The simulated results from both codes provide the correct trends of neutron production with increasing material density. However, there was substantial disagreement between the models and experimental results for lower-density materials of Al, Fe, and Cu. The model values, when normalized to the Pb experimental results, show disagreement with experiment by a factor of about two for Fe and Cu and significantly greater for Al. It is concluded that additional neutron-induced spallation measurements are required to refine models routinely employed in underground physics research. Further data collection against the above materials is an initial list for benchmarking." @default.
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• W1978442074 date "2014-09-10" @default.
• W1978442074 modified "2023-10-17" @default.
• W1978442074 title "Neutron spallation measurements and impacts on low-background experiments" @default.
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• W1978442074 doi "https://doi.org/10.1103/physrevc.90.034607" @default.
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