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CdTe detector based PIXE mapping of geological samples
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Orientador(es)
Resumo(s)
A sample collected from a borehole drilled approximately 10 km ESE of Bragança, Trás-os-Montes, was analysed by standard and high energy PIXE at both CTN
(previous ITN) PIXE setups. The sample is a fine-grained metapyroxenite grading to coarse-grained in the base with disseminated sulphides and fine veinlets
of pyrrhotite and pyrite. Matrix composition was obtained at the standard PIXE setup using a 1.25 MeV H+ beam at three different spots. Medium and high Z
elemental concentrations were then determined using the DT2fit and DT2simul codes (Reis et al., 2008, 2013 [1] and [2]), on the spectra obtained in the High
Resolution and High Energy (HRHE)-PIXE setup (Chaves et al., 2013 [3]) by irradiation of the sample with a 3.8 MeV proton beam provided by the CTN 3 MV
Tandetron accelerator. In this paper we present results, discuss detection limits of the method and the added value of the use of the CdTe detector in this
context.
Descrição
Palavras-chave
Amostras de rochas Análise de amostras Raios X PIXE
Contexto Educativo
Citação
Chaves, P. C.; Taborda, A.; Oliveira, D. P. S. de; Reis, M. A. - CdTe detector based PIXE mapping of geological samples. In: Nuclear Instruments and Methods in Physics Research B, Vol. 318, Part A, 1 January 2014, p. 37-41