Comparison of two methodologies for spectra analysis in coincidence neutron activation analysis
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Brazilian Journal of Radiation Sciences
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The Research Reactor Center (CERPq) of IPEN-CNEN/SP has been developing a facility for Coincidence
Neutron Activation Analysis (CNAA), a variation of the Neutron Activation Analysis technique in which gamma-gamma
coincidence is used to reduce spectral interferences and improve detection limits of some elements. As
the acquisition results in 2D-coincidence spectra, the spectrum analysis has to be dealt with accordingly. There
are two distinct ways to perform these analyses, either directly, by fitting bidimensional peaks in the coincidence
matrix, or by gating the spectra in one detector around each peak of interest and fitting the resulting 1D-spectrum
in the usual way. In this work, the concentrations of As, Co, Cs, Sb and Se were determined in
geological and biological reference materials by CNAA using two different methodologies of analysis, using the
BIDIM software, which provides 2D-peak-fitting; and a combination of the AnalisaCAEN suite, which gates the
2D-spectra, with Canberra’s Genie2000, which fits the resulting unidimensional spectra. The outcomes allow for
a discussion of the advantages and shortcomings of each method, both in terms of usability and of the reliability
of the results.
Como referenciar
RIBEIRO JUNIOR, I.S.; GENEZINI, F.A.; ZAHN, G.S. Comparison of two methodologies for spectra analysis in coincidence neutron activation analysis. Brazilian Journal of Radiation Sciences, v. 9, n. 1A, p. 1-12, 2021. DOI: 10.15392/bjrs.v9i1A.1540. Disponível em: http://repositorio.ipen.br/handle/123456789/32138. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.