Measurement of Radium and Radon Exhalation Rate in Marble Samples used in Al-Bayda City Market-Libya

The aim of the present study is to measure activity concentrations 226Ra, 222Rn, mass exhalation rate and annual effective dose radon in marble samples collected from Al-Bayda city local market –Libya. Samples were measured by using a low-background NaI (Tl) detector. average 226Ra 222Rn 72.57 Bq.kg-1 597.85 Bq.m-3.The vary 0.05-0.30 Bq.kg-1.S-1 with an 0.13 Bq.kg-1.S-1. was calculated under investigation. For most samples, values lower than maximum permissible limits. It can be concluded that investigation do not pose any radiological hazard dwellers buildings used their construction.