Results of measurements of an environment neutron background at BNO INR RAS objects with the helium proportional counter
Alekseenko, V. V. · Barabanov, I. R. · Etezov, R. A. · Gavrilyuk, Yu. M. · Gangapshev, A. M. · Gezhaev, A. M. · Kazalov, V. V. · Khokonov, A. Kh. · Kuzminov, V. V. · Panasenko, S. I. · Ratkevich, S. S.
Original · EN
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)+³He(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 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±0.1stat±0.3syst)×10⁻³ s⁻¹⁻².
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