Assessment of public exposure to background radiation was performed in Manyoni, Tanzania address concerns following the discovery uranium deposits their neighborhoods. Results show that highest concentrations radionuclides are 112, 95 and 463 Bq.kg-1 for 226Ra, 232Th 40K, respectively. The annual effective dose is 2.91 mSv.y-1 with a mean value 1.29 mSv.y-1. Authorities may use these results as...

The uranium (234U/238U) and radium (228Ra/226Ra) activity ratios and 87Sr/86Sr isotopic ratio in thermal groundwater, subsurface water (groundwater) and river water from Poddebice and Uniejow were determined. The uranium and radium activity ratios and strontium isotopic ratio varied from 0.629 to 1.471, from 0.396 to 4.961 and from 0.708438 to 0.710344, respectively. The results for the thermal...

Indoor radon concentrations were measured in four well-known spas of Tunisia using nuclear track detectors. The radon concentrations in these spas were found to be in the range of 19 − 870 Bq.m-3. The equilibrium factor F between radon and its progeny was found to vary in the range of 0.2 0.5, depending upon the ventilation rates within the buildings of the spas. Using the exposure-dose convers...