Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2609
Título: CdTe detector based PIXE mapping of geological samples
Autor: Chaves, P. C.
Taborda, A:
Oliveira, Daniel P. S.
Reis, M. A.
Palavras-chave: Amostras de rochas
Análise de amostras
Raios X
Data: Jan-2014
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
Resumo: 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.
URI: http://hdl.handle.net/10400.9/2609
DOI: http://dx.doi.org/10.1016/j.nimb.2013.05.098
ISSN: 0168-583X
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