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|Title: ||Assessment of radon-222 concentrations and exhalation rates of rocks and building materials|
|Authors: ||Arabi, A M El|
Ahmed, N K
Kamel, A H El
Abbady, A G E
|Issue Date: ||Apr-2006|
|Series/Report no.: ||H01J65/08|
One hundred samples were collected from two
regions (Bir El-Sid and Wady El-Gemal ) in the Nile Valley.
It contain various types of igneous and metamorphic rock samples (acidic dykes,
intermediate dykes, basic dykes, serpentinite, metagabbro, menalge). Another
set of samples were collected from different regions of Germany.
Samples were analyzed and the concentrations in Bq/kg dry weight of radium were
determined by gamma-ray spectrometry using hyper-pure germanium (HPGe)
detector. A direct method is used to measure 222Rn emanated from the
samples, which was analyzed in laboratory using the portable radon monitor
Prassi. 222Rn activity concentrations (Bq/m3) were in the
range from 36.1± 2 to 96.4 ± 6, 17.8 ± 3 to 73.6 ± 4 and 18.0 ± 2 to 188.1± 15
Bq/m3 for samples collected from Bir Elsid, Wadi El-Gemal and
samples from Germany
respectively. The corresponding values of exhalation rates were from 0.0012 to
0.004, 0.005 to 0.015 and 0.007 to 0.0069 Bq/gs for these areas respectively.
|ISSN: ||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.44(04) [April 2006]|
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