background: many radioactive compounds may be released into the environment and hence into the drinking water supplies due to the human activities. radionuclides can also enter the food chain if the contaminated water is used for drinking or irrigation purposes. objective: to estimate the annual effective dose of natural radioactive materials like 226ra and 40k in drinking water of wells in zan...

Abstract Radioactivity, whether natural or artificial, today constitutes a significant segment in the process of protecting human and animal health. Natural radioactivity is an integral part our ecological system, so it has long been present food we eat. However, intensive industrial processes some areas have disturbed balance thus introduced into environment radionuclides quantities that can a...

Introduction: Natural radioactivity in the soil is considered a major indicator of radiological contamination. Primordial radionuclides are the main source of natural radioactivity. Natural radioactivity transfers radionuclides into the environment and poses radiation hazards to people's health. Therefore, the present study aimed to determine the radon concentration an...

the existence of a high natural radiation area in the northern part of iran (ramsar) is proved. ra 226 in soil is measured. the results are: minimum 23.5 pci/g and maximum 999 pci/g soil. environmental radioactivity is from 0.1 to 5 mr/h.