title: Seabed radioactivity based on in situ measurements and Monte Carlo simulations.
abstract: 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 (40)K, (214)Bi and (208)Tl were determined utilizing the present approach. The results were validated by laboratory measurements.
authors.affiliation: Hellenic Centre for Marine Research, Institute of Oceanography, P.O. Box 712, GR-19013 Anavyssos, Greece; National Technical University of Athens, Department of Physics, Zografou Campus, GR-15780 Athens, Greece.
authors.forename: E G
authors.initials: EG
authors.lastname: Androulakaki
authors.affiliation: Hellenic Centre for Marine Research, Institute of Oceanography, P.O. Box 712, GR-19013 Anavyssos, Greece. Electronic address: tsabaris@hcmr.gr.
authors.forename: C
authors.initials: C
authors.lastname: Tsabaris
authors.affiliation: Hellenic Centre for Marine Research, Institute of Oceanography, P.O. Box 712, GR-19013 Anavyssos, Greece; National Technical University of Athens, Department of Physics, Zografou Campus, GR-15780 Athens, Greece.
authors.forename: G
authors.initials: G
authors.lastname: Eleftheriou
authors.affiliation: National Technical University of Athens, Department of Physics, Zografou Campus, GR-15780 Athens, Greece.
authors.forename: M
authors.initials: M
authors.lastname: Kokkoris
authors.affiliation: Hellenic Centre for Marine Research, Institute of Oceanography, P.O. Box 712, GR-19013 Anavyssos, Greece.
authors.forename: D L
authors.initials: DL
authors.lastname: Patiris
authors.affiliation: National Technical University of Athens, Department of Physics, Zografou Campus, GR-15780 Athens, Greece.
authors.forename: R
authors.initials: R
authors.lastname: Vlastou