caa a22 4500 469110783 CHVBK 20180323133110.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF02039776 doi (NATIONALLICENCE)springer-10.1007/BF02039776 Efficiency calibration of germanium detectors with internal standards [Elektronische Daten] [M. Felsmann, H. Denk] A simple experimental method for the efficiency calibration of germanium detectors especially for environmental samples is presented, using only the natural radionuclides in the sample. The method is based on the fact that for the energy range above 300 keV the full-energy-peak efficiency of a Ge detector can be described in a first order approximation by a linear interpolation curve in the log-log display with errors lying normally under 5%. Photons with different energies which are emitted from one radionuclide yield count rates which are correlated to the corresponding efficiencies. From this correlation one coefficient of the interpolation curve — a first order polynomial — can be calculated. The second coefficient can be obtained by the count rate of40K, resulting from KCl, which is mixed homogeneously with the sample. Expecially for environmental samples with large volumes, this method is very useful, because it takes into account the self-absorption of photons in the sample. Akadémiai Kiadó, 1992 Felsmann M. Fachhochschule Münster, Stegerwaldstr. 39, D-4430, Steinfurt, (Germany) aut Denk H. Fachhochschule Münster, Stegerwaldstr. 39, D-4430, Steinfurt, (Germany) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 157/1(1992-02-01), 47-55 0236-5731 157:1<47 1992 157 10967 https://doi.org/10.1007/BF02039776 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02039776 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Felsmann M. Fachhochschule Münster, Stegerwaldstr. 39, D-4430, Steinfurt, (Germany) aut NATIONALLICENCE 700 1- Denk H. Fachhochschule Münster, Stegerwaldstr. 39, D-4430, Steinfurt, (Germany) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 157/1(1992-02-01), 47-55 0236-5731 157:1<47 1992 157 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer