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arXiv · 1510.05109

Results of measurements of an environment neutron background at BNO INR RAS objects with the helium proportional counter

V. V. Alekseenko·I. R. Barabanov·R. A. Etezov·Yu. M. Gavrilyuk·A. M. Gangapshev·A. M. Gezhaev·V. V. Kazalov·A. Kh. Khokonov·V. V. Kuzminov·S. I. Panasenko·S. S. Ratkevich
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Abstract

A method of measurements of the environmental neutron background at the Baksan Neutrino Observatory of the INR RAS are described. Measurements were done by using of a proportional counter filled with mixture of Ar(2 at)+$^3$He(4 at). The results obtained at the surface and the underground laboratory of the BNO INR RAS are presented. It is shown that a neutron background in the underground laboratory at the 4900 m w.e. depth is decreased by $\sim 260$ times without any special shield in a comparison with the Earth surface. A neutron flux density in the 5-1323.5~cm air height region is constant within the determination error and equal to $(7.1\pm0.1_{\rm{stat}}\pm0.3_{\rm{syst}})\times10^{-3}$ s$^{-1}\cdot$cm$^{-2}$.

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V. V. Alekseenko, I. R. Barabanov, R. A. Etezov, Yu. M. Gavrilyuk, A. M. Gangapshev, A. M. Gezhaev, V. V. Kazalov, A. Kh. Khokonov, V. V. Kuzminov, S. I. Panasenko, S. S. Ratkevich. 2015-10-29. Results of measurements of an environment neutron background at BNO INR RAS objects with the helium proportional counter. https://arxiv.org/abs/1510.05109

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