The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The approach is based on in-situ measurements performed with a portable high-resolution germanium γ-spectrometer and on calculations of the depth distribution by an unfolding method. To unfold the depht distribution of 137 Cs concentration in soil four detector responses and the iterative procedure SAND II were used. The detector responses consist of the responses to primary 662 keV photons and to photons scattered in soil with the rest energies of 620-655 keV. The detector is used with and without collimator. The method is sufficiently sensitive for measurements of 137 Cs concentration in soil 10 years after the Chemobyl accident. The results are compared to laboratory analyses of collected soil samples and with a standard method of in-situ spectrometry.