M.E. Globus, B.V.Grinyov, M.A.Ratner, V.A.Tarasov
Received 15 September, 1998
Two methods of registration and identification of radionuclides,
present in the sample in small amounts, are considered. The most widespread
method, based on counting gamma-photons within a narrow energy
window, in some cases lacks sensitivity. Another method, consisting
in the expansion of the registered energy spectrum in basis spectra,
becomes unreliable for nuclides with overlapping spectra and for that
reason is not broadly used in actual practice. The demerits of these
identification methods require their optimization which is carried
out in the present work. For that purpose, the successive stages of
the detection process are calculated and analyzed. It is shown that
the second method is essentially connected with the energy resolution
of the scintillation detector.