Measurement of Muon-induced High-energy Neutrons from Rock in an Underground Gd-doped Water Detector
| Autor: | M. Bergevin, S. D. Rountree, Adam Bernstein, F. Sutanto, C. Roecker, S. Quillin, Steven Dazeley, P. Jaffke, M. Askins, Igor Jovanovic, Nathaniel Bowden, O. A. Akindele |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Physics - Instrumentation and Detectors Spectrometer 010308 nuclear & particles physics Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Detector FOS: Physical sciences Mars Exploration Program Instrumentation and Detectors (physics.ins-det) 01 natural sciences Neutron temperature High Energy Physics - Experiment Nuclear physics High Energy Physics - Experiment (hep-ex) Recoil Neutron flux Water detector 0103 physical sciences Neutron 010306 general physics Nuclear Experiment |
| DOI: | 10.48550/arxiv.2008.13266 |
| Popis: | We present a measurement of the rate of correlated neutron captures in the WATCHBOY detector, deployed at a depth of approximately 390 meters water equivalent (m.w.e.) in the Kimballton Underground Research Facility (KURF). WATCHBOY consists of a cylindrical 2 ton water target doped with 0.1% gadolinium, surrounded by a 40 ton undoped water hermetic shield. We present a comparison of our results with the expected rate of correlated neutron captures arising from high-energy neutrons incident on the outside of the WATCHBOY shield, predicted by a hybrid FLUKA/GEANT4-based simulation. The incident neutron energy distribution used in the simulation was measured by a fast neutron spectrometer, the 1.8-ton Multiplicity and Recoil Spectrometer (MARS) detector, at the same depth. We find that the measured detection rate of two correlated neutrons is consistent with that predicted by simulation. The result lends additional confidence in the detection technique used by MARS, and therefore in the MARS spectra as measured at three different depths. Confirmation of the fast neutron flux and spectrum is important as it helps validate the scaling models used to predict the fast neutron fluxes at different overburdens. Comment: 11 pages, 16 figures, Phys. Rev. C (forthcoming) |
| Databáze: | OpenAIRE |
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