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Gross beta activities and Beryllium-7 concentrations in surface air
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F. Arkian   , J. Amidi |
| , arkian 1@yahoo.com |
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Abstract: (14437 Views) |
ABSTRACT Background: were made each week during year 2002 from samples of atmospheric aerosols filtered from the air at Tehran Nuclear Research Center. Measurement of gross beta activities and cosmogenic Beryllium-7 concentrationsMaterials and Methods sampler at the Nuclear Research Center meteorological station in Tehran (40 contents of samples were determined with semiconductor gamma spectrometry. The long-lived beta activity, i.e. total beta activity measured four days after the end of sampling (after decay of : The aerosol samples were collected weekly with high-volume airo 35. N). The 7Be220 The long-lived beta activity consists mainly of amount of artificial radionuclides in the air is negligible. Rn progeny and short-lived 220Rn progeny), was assessed with an automatic beta analyzer.210Bi, the daughter nuclide of 210Pb, as theResults: lognormal distribution during the study period 2002. The arithmetic mean of annual concentrations of The air concentrations of both the 7Be and the long-lived beta activity displayed a7Be and 210 Pb was 6.30 and 0.50 mBqm-3, respectively .Conclusion: beta activities are partially correlated. Both have maximum concentrations during warm mid-year months. Despite the different origins, the concentrations of both the 7Be and the long.livedIran. J. Radiat. Res., 2005 2 (4): 211-213 |
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| Keywords: lead-210, gamma spectrometry, gross beta activity, Beryllium-7 concentrations |
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Full-Text [PDF 196 kb]
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Type of Study: Original Research |
Subject:
Radiation Biology
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