Details

Autor(en) / Beteiligte

• Walther, T

Titel

Comparison of experimental and theoretical X-ray intensities from (In)GaAs specimens investigated by energy-dispersive X-ray spectroscopy in a transmission electron microscope

Ist Teil von

• Journal of physics. Conference series, 2010-02, Vol.209 (1), p.012029

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2010

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Experimental measurements of X-ray line intensity ratios in a transmission electron microscope are compared over several orders of magnitude of sample thicknesses, from the nm- to the mm- range, with Monte-Carlo simulations using two different software packages. It is shown that the form of the thickness dependence of the K/L ratio of characteristic X-ray lines for GaAs is reproduced qualitatively, but the numerical differences between software packages are large. A scheme is presented for improving the simple k-factor method, taking explicitly into account the thickness dependence that remains even after application of the usual absorption and fluorescence corrections. This is done in first-order approximation by linear regression. The improvement in determining the correct indium concentration in specimens of InGaAs is calculated to be 1at%.