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arxiv: 1507.05488 · v2 · pith:KYNPKTB3new · submitted 2015-07-20 · ⚛️ nucl-ex · physics.ins-det

The study of the thermal neutron flux in the deep underground laboratory DULB-4900

V. V. Alekseenko , Yu. M. Gavrilyuk , A. M. Gangapshev , A. M. Gezhaev , D. D. Dzhappuev , V. V. Kazalov , A. U. Kudzhaev , V. V. Kuzminov
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S. I. Panasenko S. S. Ratkevich D. A. Tekueva S. P. Yakimenko Yu. V. Sten'kin
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classification ⚛️ nucl-ex physics.ins-det
keywords fluxneutronthermaldulb-4900laboratorydeepmodulationunderground
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We report on the study of thermal neutron flux using monitors based on mixture of ZnS(Ag) and LiF enriched with a lithium-6 isotope at the deep underground laboratory DULB-4900 at the Baksan Neutrino Observatory. An annual modulation of thermal neutron flux in DULB-4900 is observed. Experimental evidences were obtained of correlation between the long-term thermal neutron flux variations and the absolute humidity of the air in laboratory. The amplitude of the modulation exceed 5\% of total neutron flux.

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