A comprehensive study of natural gamma radioactivity levels and associated dose rates from surface soils in cyprus

Abstract

A survey was carried out to determine activity concentration levels and associated dose rates from the naturally occurring radionuclides 232

Indoor and outdoor in situ high-resolution gamma radiation measurements in urban areas of Cyprus

“…In The present results on the outdoor specific activity of the three naturally occurring radionuclides are in very good agreement with the corresponding values obtained previously by laboratory high-resolution gamma spectrometry of soil samples from the main geological formations of Cyprus (3,4) . The 5 districts covered by the present in situ measurements belong to 4 different geological formations of sedimentary origin, which have been studied and discussed in details (with respect to naturally occurring radioactivity) elsewhere (3,4) .…”

“…The 5 districts covered by the present in situ measurements belong to 4 different geological formations of sedimentary origin, which have been studied and discussed in details (with respect to naturally occurring radioactivity) elsewhere (3,4) . According to these, the averaged specific activities over all main sedimentary formations were found to be (A.M ± S.D.)…”

Ingestion of U(nat),226Ra,230Th and210Po in vegetables by adult inhabitants of Bagjata uranium mining area, Jharkhand, India

“…Natural radioactivity arises mainly from the primordial radionuclides, such as 40 K, and the radionuclides from the 238 U and 232 Th and their decay products, which are present at trace levels in all ground formations (Tzortzis et al, 2004). The knowledge on the levels of the naturally occurring radionuclides is important because they contribute a substantial portion of the radiation dose to the living organisms (NCRP, 1975;UNSCEAR, 1993).…”

Measurement of Natural Radioactivity in Sand Samples Collected from Ad-Dahna Desert in Saudi Arabia

“…Under normal conditions, artificial radioactivity emitted from the nuclear power plants, industrial plants and research facilities has smaller contribution to the overall radiation. Natural environmental radioactivity arises mainly from primordial radionuclides, such as 226 Ra, 232 Th, 40 K and their decay products, which occur at trace levels in all ground formations [4]. Accumulation of these radionuclides in the environment raises many problems concerning safety of biotic life, food chain and ultimately humans.…”