The average concentrations of the members of the uranium and thorium decay chains in drinking water are around 1 Bq/m3. To measure these concentrations by gamma-ray spectrometry large sample quantities have to be processed. To achieve appropriate sensitivity about 50 L of sample have to be evaporated and the dry residue is measured. In this way concentrations of all long-lived isotopes, except U-234, Th-230 and Th-232 can be determined. Concentrations of these isotopes are assessed from the measurement results using simple models.
B.04 Guest lecture
COBISS.SI-ID: 21925927