Analysis of gross alpha, gross beta activities and beryllium-7 concentrations in surface air: their variations and statistical prediction model |
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Authors: | Foroozan Arkian Maryam Salahinejad Ali Akbar Bidokhti Amir Meshkatee |
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Institution: | (1) Azad University, Tehran Shomal Branch, Darband street, Tehran, Iran;(2) Nuclear Science and Technology Institute, Nuclear Research School, Tehran, Iran;(3) Azad University, Tehran, Iran |
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Abstract: | Measurement of gross α, gross β activities and cosmogenic beryllium-7 (7Be) concentrations were made both daily and weekly during the years 2001–2004 from samples of atmospheric aerosols filtered
from the air at Tehran Nuclear Research Center (35 41′ N) and Zahedan (28 29′ N). Weekly aerosol samples collected with the
high-volume air samplers on cellulose filters were used to determine the 7Be contents of samples, using a semiconductor gamma spectrometer. Airborne dust samples were collected daily on fiber glass
filters and used to determine the gross β and gross α activities with automatic beta analyzer and a ZnS(Ag) counter, respectively.
In this work, the concentration and meteorological data were used to determine models for gross α, gross β and 7Be. The air concentrations of gross β and gross α activities and 7Be concentrations displayed lognormal distributions during the study period. Both β and 7Be have maximum activity concentrations during warm mid-year months. |
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Keywords: | Beryllium-7 concentration Gross β activity Gross α activity Meteorology parameters |
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