Four types of light weight concrete (LWC) commonly used in Hong Kong, namely, autoclave aerated concrete (plus lime), autoclave aerated concrete (plus Pulverized Fuel Ash or PFA), concrete with synthetic aggregate 'Leca' and concrete with polystyrene bean as aggregate were measured for their 226Ra, 232Th and 40K contents using high-resolution gamma spectrometry. All the radionuclide contents ex...

The existence of radioactivity linked to the heavy-bearing minerals in building materials—such as granite—has increased attention extraction procedure. Granite rocks play an essential economic role various areas Egypt. Thus, this study intended detect 238U, 232Th, and 40K activity concentrations examined granite samples determine corresponding radiological risks associated with granite. studied...

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...

Abstract In this study, the effect of various types fertilizers on natural radioactivity levels in agricultural soil was investigated research. The activity concentration 226Ra, 232Th, and 40K fertilizer samples were determined by using gamma-ray spectroscopy a high-purity germanium (HPGe) detector to determine concentrations 40K. for phosphate raw (2300-5400) Bq/kg, (9-53) (56-3000) respective...