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Measurement of 226Ra, 228Ra, 137Cs and 40K in edible parts of two types of leafy vegetables cultivated in Tehran province-Iran and resultant annual ingestion radiation dose
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| V. Changizi, Z. Jafarpoor, M. Naseri |
| , changizi@sina.tums.ac.ir |
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Abstract: (12367 Views) |
| Background: The sources of radioactivity in the
environment have natural, terrestrial and extraterrestrial,
and anthropogenic origins. Plants may get radioactive
nuclides in two ways: (i) by the deposition of
radioactive fallout, (ii) by absorption from the soil.
Materials and Methods: The Concentrations of the
natural radionuclides (226Ra, 228Ra, 40K) and the
artificial radionuclide (137Cs) in leek and parsley in
Tehran province-Iran were determined using HPGe.
Also the effective dose due to the ingestion of such
vegetables by the population of Tehran province was
studied. Results: The average value of radionuclide
concentrations in parsley samples were measured
177.69 ± 12.47 mBq kg-1 fresh for 226Ra 349.62 ±
28.42 mBq kg-1 fresh for 228Ra 187364.6 mBq kg-1 fresh
for 40K. The average value of radionuclide concentrations
in leek samples were measured 94.31 ± 6.46
mBq kg-1 fresh for 226Ra 207.47 ± 19.46 mBq kg-1 fresh
for 228Ra 174555 ± 1704.21 mBq kg-1 fresh for 40K.
The concentrations of 137Cs in most of Parsley and
Leek samples were below the minimum detectable
activity (MDA). Conclusion: The Average 226Ra and
228Ra activities in 29 leek and parsley samples were
about 2.63 and 6.78 times the reference values,
respectively. The annual effective dose resulting from
the studied radionuclides for the adult population in
Tehran province were found to be safe in comparison
with normal background areas. Iran. J. Radiat. Res.,
2010 8 (2): 103-110 |
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| Keywords: 226Ra, 228Ra, 40K, 137Cs, leafy vegetable, HPGe, effective dose. |
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Full-Text [PDF 323 kb]
(2683 Downloads)
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Type of Study: Original Research |
Subject:
Medical Physics
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