Radionuclides in Costa-Rican corals

Using Low Level Gamma Spectrometry it has been evaluated the activity (Bq/kg) of K-40, the gamma emisor daugthers of U-238 and Th-232 and the presence of artificial, isotopes due to anthropogenic contamination. The probes used are coral as biodynamic captors. The results show a presence between low and mittel of natural isotopes compared to other accumulation processes like sedimentation in soil and agricultural production. The Caribbean side show a higher activity than Pacific for K-40 and a similar for Ra-226. Results show low activity for artificial radionuclides with short life (Cs-137).