Seabed radioactivity based on in situ measurements and Monte Carlo simulations

摘要

Activity concentration measurements were carried out on the seabed, by implementing the underwater detection system KATERINA. The efficiency calibration was performed in the energy range 350-2600 keV, using in situ and laboratory measurements. The efficiency results were reproduced and extended in a broadened range of energies from 150 to 2600 keV, by Monte Carlo simulations, using the MCNP5 code. The concentrations of K-40, Bi-214 and (TI)-T-208 were determined utilizing the present approach. The results were validated by laboratory measurements. (C) 2015 Elsevier Ltd. All rights reserved.