قياس الفعالية الإشعاعية لنظير البريليوم-7 لنماذج من تربة مدينة بغداد باستعمال مطيافية أشعة كاما

الملخص EN

This study deals with the measurement of the specific activity radiation for beryllium-7 isotope in Baghdad city for samples of surface soils, by using gamma ray spectrometer technique.

Twenty one samples were collected from surface soil of Baghdad city from Risafa and Karkh sides, (7) samples from Risafa side and (14) samples from Karkh side, where the axis for locations which are fixed by using (G.P.S.).

Gamma-ray spectrometry system (DSA 2000) with high purity germanium detector was used, which has (50 %) efficiency and resolution of (2.2 keV) at gamma line (1332 keV) of 60Co source.

The specific activity values for beryllium-7 isotope in surface soil of Risafa and Karkh sides, ranged between (B.D.L.- 32.827 ± 6.636) Bq / kg for Risafa soil , and (B.D.L.-23.660 ± 3.703) Bq / kg for Karkh soil.

While the average of beryllium-7 isotope in surface soil of Baghdad city from Risafa and Karkh sides would be (32.827 ± 6.636) Bq / kg & (23.660 ± 3.703) respectively.

The results showed that the most samples have a specific activity for beryllium-7 isotope which is higher than that for normal limits of international levels because of falls of atmosphere dust resulting from sun reactions.