Tidal effect in the radon-due neutron flux from the Earth's crust

Алексеенко, В. В.; Gavriluk, Yu. M.; Kuzminov, V. V.; Stenkin, Yu. V.

doi:10.1088/1742-6596/203/1/012045

Cited by 16 publications

(22 citation statements)

References 2 publications

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“…The S1 and S2 solar tidal components are present in our data similarly to other published results (e.g. Kies et al, 1999;Groves-Kirkby et al, 2006;Alekseenko et al, 2010;Steinitz and Piatibratova, 2010). To determine the origin of the tidal constituents in the radon concentration data, the tidal components of the theoretical tidal potential, calculated for the location of the SGO, and the measured radon concentration data series were adjusted by means of the ETERNA 3.4 program package.…”

Section: Resultssupporting

confidence: 85%

“…Garavaglia et al (2000) found low correlation between tilt-strain and radon emission in underground observatories. Several papers deal with the connection of radon concentration and Earth tides (Alekseenko et al, 2010) in underground caves (Barnet et al, 1997a(Barnet et al, , 1997bKies et al, 1999) and in dwellings (Groves-Kirkby et al, 2004). Richon et al (2009) treat the impact of barometric tides on radon concentration in their publication.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

Mentes

Eper-Pápai

2015

Journal of Environmental Radioactivity

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Radon concentration variation has been monitored since 2009 in the artificial gallery of the Sopronbánfalva Geodynamic Observatory, Hungary. In the observatory, the radon concentration is extremely high, 100 -600 kBq m-3 in summer and some kBq m-3 in winter. The relationships between radon concentration, temperature and barometric pressure were separately investigated in the summer and winter months by Fast Fourier Transform, Principal Component Analysis, Multivariable Regression and Partial Least Square analyses in different frequency bands. It was revealed that the long-period radon concentration variation is mainly governed by the temperature (20 kBq m-1 °C-1) both in summer and winter. The regression coefficients between long-period radon concentration and barometric pressure are -1.5 KBq m-3 hPa-1 in the summer and 5 KBq m-3 hPa-1 in the winter months. In the 0.072-0.48 cpd frequency band the effect of the temperature is about -1 kBq m-3 °C-1 and that of the barometric pressure is -5 KBq m-3 hPa-1 in summer and -0.5 KBq m-3 hPa-1 in winter. In the high frequency range (> 0.48 cpd) all regression coefficients are one order of magnitude smaller than in the range of 0.072-0.48 cpd. Fast Fourier Transform of the radon concentration, temperature and barometric pressure time series revealed S1, K1, P1, S2, K2, M2 tidal constituents in the data and week O1 components in the radon concentration and barometric pressure series. A detailed tidal analysis, however, showed that the radon tidal components are not directly driven by the gravitational force but rather by solar radiation and barometric tide. Principal Component Analysis of the raw data was performed to investigate the yearly, summer and winter variability of the radon concentration, temperature and barometric pressure. In the summer and winter periods the variability does not change. The higher variability of the radon concentration compared to the variability of the temperature and the barometric pressure shows that besides the temperature and barometric pressure variations other agents, e.g. natural ventilation of the observatory, wind, etc. also play an important role in the radon concentration variation. Sopronbánfalva Geodynamic Observatory, Hungary. In the observatory, the radon 7 concentration is extremely high, 100 -600 kBq m -3 in summer and some kBq m -3 in winter. 8The relationships between radon concentration, temperature and barometric pressure were

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

Mentes

Eper-Pápai

2015

Journal of Environmental Radioactivity

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“…So, the amplitude of neutron flux modulation ∆Φ n ≥ 5% taking into account the intrinsic background from 210 Po. The behaviour of the count rate of the detectors and humidity is very similar to that measured in work [6]. The continuous decrease of count rate is due to decay of 210 Pb.…”

Section: Resultssupporting

confidence: 79%

“…The experimental setup consist of four detectors (D1, D2, D3 and D4) and three sensors (temperature, humidity, pressure). The detectors are identical to that used in [6]. The schematic view of the setup is presented in Fig.…”

Section: Methodsmentioning

confidence: 99%

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

et al. 2017

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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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“…Therefore, it is possible to monitor the radon concentration in soil by measuring the thermal neutron flux. This method developed by us (ALEKSEENKO et al,2009;ALEKSEENKO et al 2010) has many advantages, mainly the fact that it is not sensitive to air drought, ventilation, humidity, etc., but only to the radon concentration underground (in soil, rock, concrete, etc.). More precisely, the neutron yield is proportional to the radon density flux through soil, rock, concrete or other porous materials close to the detector.…”

Section: Introductionmentioning

confidence: 99%

Seasonal and Lunar Month Periods Observed in Natural Neutron Flux at High Altitude

Stenkin

Алексеенко

Cai

et al. 2017

Pure Appl. Geophys.

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Air radon concentration measurement is useful for research on geophysical effects, but it is strongly sensitive to site geology and many geophysical and microclimatic processes such as wind, ventilation, air humidity and so * Corresponding author: Xinhua Ma, Key Laboratory of Particle Astrophysics, Institute of High energy Physics, Chinese Academy of Sciences, P.O.Box 918(3), Yuquan Road 19(B), Beijing 100049, China E-mail: maxh@ihep.ac.cn 1 on that induce very big fluctuations on the concentration of radon in air. On the contrary, monitoring the radon concentration in soil by measuring the thermal neutron flux reduces environmental effects. In this paper we report some experimental results on the natural thermal neutron flux as well as the concentration of air radon and its variations at 4300 m a.s.l. These results were obtained with unshielded thermal neutron scintillation detectors (en-detectors) and radon monitors located inside the ARGO-YBJ experimental hall. The correlation of these variations with the lunar month and 1-year period is undoubtedly confirmed. A method for earthquakes prediction provided by a global net of the en-detectors is currently under study.

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Tidal effect in the radon-due neutron flux from the Earth's crust

Cited by 16 publications

References 2 publications

Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

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

Seasonal and Lunar Month Periods Observed in Natural Neutron Flux at High Altitude

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