Gamma spectrometric measurement of uranium isotopic composition and mass in sintered UO pellets using the efficiency transfer method.

Gamma spectrometric measurements to determine the isotopic composition and total uranium mass in UO pellets (D = 7.5 mm; H = 3.5 mm, ρ = 10 g/cm) were carried out.

A Monte Carlo method for calculation of the characteristic limits decision threshold and detection limit in low-level radioactivity measurements.

In this study, calculation of decision threshold and detection limit expressed in counts for low-level radioactivity measurements were evaluated and compared to a Monte Carlo method for the case of paired Poisson-distributed observations, i.e. for discrete variables.

Alpha spectrometry and liquid scintillation counting for the measurement of Pu, Pu, Pu, Pu, Pu and age.

A method for the measurement of the isotopic composition and time since last chemical separation (age) of plutonium is presented. The method includes alpha spectrometric measurement of Pu, Pu and Pu where the ratio of Pu and Pu was determined using spectral deconvolution, and liquid scintillation counting of Pu, after chemical separation of plutonium and americium. For the age determination, the Pu determined using liquid scintillation counting was combined with alpha spectrometric measurement of Am.

Characterization of strong (241)Am sources.

Gamma ray spectra of strong (241)Am sources may reveal information about the source composition as there may be other radioactive nuclides such as progeny and radioactive impurities present. In this work the possibility to use gamma spectrometry to identify inherent signatures in (241)Am sources in order to differentiate sources from each other, is investigated. The studied signatures are age, i.

On the categorization of uranium materials using low resolution gamma ray spectrometry.

In order to characterize uranium materials during e.g. nuclear safeguards inspections and in initial stages of nuclear forensic investigations, hand-held low resolution gamma ray detection instruments with automatic uranium categorization capabilities may be used.