№ 1, 2018

Predominant frequencies of soil and their influence on the gamma field and level of subsoil radon activity: Baku city as a case study

Aliyeva A.R.

Geology and Geophysics Institute, Azerbaijan National Academy of Sciences, H.Javid Ave., 119, Baku, Azerbaijan, AZ1143: aziza-alieva@rambler.ru

Summary. The paper attempts to compare the soil parameters by microtremor measurements with the natural radiation background and radon field over the central part of Baku city. These researches revealed that radon concentration in soil depended on the integrated factors such as soil radioactivity, soil type, dominant (resonance) frequencies and soil amplification factor. The direct dependency between radon concentration, dominant (resonance) frequency and soil amplification factor was determined. In the reviewed frequency range, the highest radon concentration is observed at about 10 Hz with soil amplification factor at the point of 1.9-2.1. The paper also concludes that the lowest levels of radon concentration and radioactivity are evident in sands, but the highest values ​​are found in unconsolidated rocks with inclusions of loam, gravel and clay.

Keywords: radiation background, Baku city, radon, microtremor measurements



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