PhD thesis supervisor: dr. Arūnas Gudelis (apply for recommendation)
Application of the liquid scintillation counting for the accurate measurements of the radionuclide activity
Liquid scintillation counting spectrometry methods are often used to measure the activity of radionuclides, not alpha- or gamma-emitters. To measure activity with the greatest precision (or, in other words, with the least uncertainty), primary methods should be used. They may be different, depending on the decay scheme of the radionuclide. For example, to precisely measure the activity of radionuclides decaying by electron capture, it is necessary to register coincidences in scintillating solutions and at the same time evaluate all electrons generated during decay, including the Auger process. For this, it is necessary to define the interaction of the particles generated during the decay with the detector. In this way, the result is obtained by combining theoretical calculations with experiment. This allows the development of existing methods and the creation of new ones, with the help of which it will be possible to measure the activity of Fe-55, Mn-54, Ni-59, Zn-65 and other nuclides with similar decay schemes with high accuracy (U<1%, k=2). It is planned to prepare 3 scientific articles on this topic.