The task of the Radiometric Laboratory of the Eötvös Loránd Geophysical Institute of Hungary is a survey of the radioactivity coming from the naturally occurring radioelements and also elements originating from human activity (eg. Chernobyl accident, military weapon experiments). The first group consists of the decay series isotopes of U-Ra, Th and the K-40 the second one is the Cs-137. For this purpose the laboratory is equipped with a car mounted gamma-measuring system. The basis of the measuring system is a liquid nitrogen cooled, high purity germanium semiconductor detector (HpGe). By the help of the built-in professional computer system, there is the possibility of the prompt analysis and report of the locally obtained spectra. This is independent of the electric network. In case of nuclear accidents this system can also work as a monitoring unit.


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