İstanbul-Beykoz’daki Bazı Toprak Örneklerinde Doğal Radyoaktivite ve Radyolojik Parametre Tayini
Evrenin ilk yaratılışından beri var olan doğal radyasyonun belirlenmesi oldukça önemlidir. Bu amaçla bu çalışmada İstanbul’unBeykoz ilçesinde farklı örnekleme noktaları belirlenerek doğal radyoaktivite (226Ra, 232Th, 40K) konsantrasyonları HPGe detektörkullanılarak hesaplanmıştır. Yapılan ölçümler sonucunda, radyum konsantrasyonu 27,75 BqKg-1ile 63,79 BqKg-1arasında, toryumkonsantrasyonu 30,74 BqKg-1ile 89,75 BqKg-1arasında, potasyum konsantrasyonu 533,73 BqKg-1ile 912,12 BqKg-1arasındadeğiştiği bulunmuştur. Ayrıca çalışmada, radyum eşdeğeri (Raeq), soğrulan gama doz hızı (D), yıllık etkin doz değeri, (AEDE), yaşamboyu kanser riski (ELCR) miktarları hesaplanmıştır. Elde edilen hesaplamaların tamamı hem ulusal hem de uluslar arası standartlarlave yapılmış olan benzer çalışmalarla karşılaştırılmıştır.
Determination of Natural Radioactivity and Radiological Effects in some Soil Samples in Beykoz-Istanbul
It is important to measure natural radioactivity which existed since the creation of universe. Thus in this study, 226Ra, 232Th, 40K concentrations were calculated at different sampling points in Beykoz district of Istanbul using HPGe detector. As a result of the measurements, the concentration of radium, thorium, potassium level have been found to be varied from 27.75 BqKg-1 to 63.79 BqKg1 , 30.74 BqKg-1 to 89.75 BqKg-1 and 533.73 BqKg-1 to 912.12 BqKg-1 respectively. In addition, radium equivalent (Raeq), absorbed gamma dose rate (D), annual effective dose equivalent, (AEDE), excess lifetime cancer risk (ELCR) were calculated in the study. All of the calculations have been compared with both national and international standards and similar studies.
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