Abstract：
:Some unexpected sporadic increases of an environmental radioactive background have been recorded at mountain level at Baksan Neutrino Observatory (BNO, 1700 m above sea level) using electron-neutron detectors (en-detectors), which could be explained by radioactive aerosol enhancements. The large area inorganic scintillator en-detectors developed for cosmic ray study are continuously monitoring environmental thermal neutron fluxes at various geophysical conditions. Application of the pulse shape discrimination method allows us to select and separately measure both thermal neutrons and radioactive beta-decay nuclides being products of radon decays in air (mostly Rn-222 and Rn-220). There are two en-detector setups running now at BNO, one deep underground while another one at surface. Both installations had recorded some strange sporadic increases of radioactive nuclides in air. In this paper, we present results and the most probable explanation of the significant increases joint by radioactive aerosols production but caused by different reasons: Baksan river floods or nearby underground experiment with powerful Cr-51 radioactive source.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Stenkin YV,Alekseenko VV,Dzhappuev DD,Kuleshov DA,Kudjaev AU,Levochkin KR,Mikhailova OI,Shchegolev OB,Stepanov VIdoi
10.1016/j.jenvrad.2020.106335subject
Has Abstractpub_date
2020-10-01 00:00:00pages
106335eissn
0265-931Xissn
1879-1700pii
S0265-931X(20)30142-9journal_volume
222pub_type
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