SSIMS matrix effect

Matrix effect The matrix effect in SSIMS is defined as the dependence of P(M — Xt), Kj. and Ku on the chemical composition of the analyzed surface. 

The situation becomes even more complex if mixtures of different materials exist at the surface. Fortunately in most cases the spectra of mixtures can be explained by superposition of the spectra of the individual compounds. Unfortunately such a superposition cannot necessarily be used for quantification since the matrix effect in SSIMS has to be taken into account, but is useful for qualitative identification i.e., the peaks present in the spectra of the individual compounds appear also in the spectrum of the mixture. Mixed ions, i.e.. those formed by reaction between the individual compounds, are rarely observed, Spectra libraries can therefore be used successfully to identify the individual compounds,... 

In Section 1.1 the matrix effect in SSIMS was introduced, i.c., the dependence of the number of detected secondary ions on the particular chemical environ-... 

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