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Radium Content and Radon ExhalationRate from Natural Samples Using SSNTD |
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PP: 101-107 |
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Author(s) |
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A .H. Ashry,
W . Arafa,
M.Abou-leila,
A. A. Taha,
Omar . E .AbdElnaeem,
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Abstract |
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| Radium levels in some soil and fertilizers are analyzed from radiation protection perspective. In this work, evaluation of Radon concentration, radium activity, the radon exhalation rate in some fertilizers and soil sample in Khabat village Sohage governorate, Egypt, were addressed and discussed using CR-39 nuclear track detector. In that technique, radon gas passively diffused into the detector. For radium measurements, CR-39 Samples have been calibrated by using some natural samples with known radium activity. The radium activity in the natural sample has been determined using high pure germanium detector. Linear relationship between track density and radium activity has been achieved. It is found that the calibration factor of CR-39 for radium measurements is (0.014 Trcks.cm-2.day/Bq.kg-1). The mass and areal Radon exhalation rate show linear relation with radium content in the samples .The radon gas concentration show large variation with the maximum concentration ((7523.81 Bq/m3) in the waste product of Abo-Zaboul factory. The minimum value (71.43Bq/m3 ) is found in ammonium chemical fertilizer sample.Values of radium content in all soil samples except those near Abo-Zaboul factory are less than the permitted value of 370 Bq/kg authorized by organization for Economic corporation and development. |
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