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– In so doing, can cause fluorescence of other x-ray lines • The x-rays that exit the free surface of the sample do not exactly
correspond to the x-ray spectrum generated within sample
– ZAF / phi-rho-Z correction •
• An energy dispersive detector collects the resulting x-rays
The detection system degrades the spectrum
Displays the familiar EDS spectrum
Extract peak intensities from spectrum Two separate issues – what happens within the sample and what happens
within the detection system! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 13
! 28 Within the Sample! • Once it is established what came out of the
sample surface, need to run ZAF to
determine what was generated
• Z - Atomic number
• A - Absorption
• F - Fluorescence of lower Z atom s x-ray by
absorption of an x-ray photon CBEMS 164 – XRD, SEM & Microanalysis: Lecture 13
! 29 How Does One Get From Spectrum to Quantitative Data?! • Extract from spectrum intensities for each line
– Account for detector artifacts
– Strip background
– Deconvolute overlapping peaks • Discard int...
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This note was uploaded on 01/16/2014 for the course CBEMS 164 taught by Professor Porter,j during the Fall '08 term at UC Irvine.
- Fall '08