background: radon concentration was measured in 50 drinking water samples in mashhad - iran. b the tap water used for drinking and other household usages can increase the indoor radon level. drinking water samples were collected from various places and supplies of public water used in mashhad. then radon concentration has been measured by portable radon gas surveyor silena (prassi) system. resu...

introduction natural and artificial radionuclides are the main sources of human radiation exposure. these radionuclides, which are present in the environment, can be dissolved into water. evidence suggests that radionuclides being entered the human body through drinking or hot spring water can be harmful for human health. materials and methods in this study,10 samples were collected from ground...

introduction guilan is one of the provinces in north of iran, with population of 2,480,874 and a total area of ​​14,042 square kilometers. this study assesses the outdoor natural gamma dose rates in the air of 49 cities in guilan and calculates corresponding average annual effective dose. materials and methods a total of 260 different sample points measurements were carried out. the results inc...

background: there is a rapid increase worldwide in the consumption of mineral waters which may contain different level of radioactive elements, especially 226ra, in addition to varying amounts of beneficial salts. therefore, a comprehensive study was planned and carried out in order to determine concentration of 226ra natural radionuclide in bottled mineral waters that commercially available in...

background: human is exposed to radiation in their environment with or without their consent and the exposure to natural background radiation is an unpreventable event on earth. materials and methods: an in situ assessment of the indoor and outdoor background radiation in akwanga and keffi towns of nasarawa state nigeria was carried out using a halogen-quenched geiger muller (gm) detector (insp...

background: radon is one of the most important radioactive elements which is released by natural decay of available uranium and radium in the ground. the presence of radon gas is common, wherever those faults are located there. radon concentration of various drinking water resources of bam villages; located near bam fault; was measured. materials and methods: this cross-sectional study was cond...