The effect of air mass origin on the ambient concentrations of ⁷Be and ²¹⁰Pb in Islamabad, Pakistan.
Concentration of radionuclides ²¹⁰Pb and ⁷Be, having half lives of 22.3 years and 53.29 days, respectively, in the surface air samples of Islamabad (33.38°N, 73.10°E and Altitude ∼536 m asl.) are measured. The non-destructive technique of gamma-spectrometry, with a high purity germanium HPGe detector, was employed for the analysis of all samples. The annual average concentrations of ²¹⁰Pb and ⁷Be in the surface air samples were determined as 0.284 ± 0.15 and 3.171 ± 1.14 mBq m⁻³, respectively. Our results have shown a seasonal variation of the concentration of ⁷Be in air samples with high values for the spring season. High concentrations for ²¹⁰Pb are obtained when air masses originate from plain areas of Pothohar region, located in the South-West, West and North West of Islamabad. Our values of concentrations show a nice agreement with the relevant reported results.
Ali
N
N
DPAM, PIEAS, Islamabad, Pakistan. nawab_71@yahoo.com
Khan
E U
EU
Akhter
P
P
Khattak
N U
NU
Khan
F
F
Rana
M A
MA
D000336:Aerosols / Q000032:analysis; D000388:Air / Q000032:analysis; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001608:Beryllium / Q000032:analysis*; D007856:Lead Radioisotopes / Q000032:analysis*; D010154:Pakistan; D011834:Radiation Monitoring; D011868:Radioisotopes / Q000032:analysis*
D000336:Aerosols; D000396:Air Pollutants, Radioactive; D007856:Lead Radioisotopes; D011868:Radioisotopes; D001608:Beryllium